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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- S E M _ P R A G --
-- --
-- B o d y --
-- --
-- Copyright (C) 1992-2006, Free Software Foundation, Inc. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 2, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
-- Public License distributed with GNAT; see file COPYING. If not, write --
-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
-- Boston, MA 02110-1301, USA. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
-- This unit contains the semantic processing for all pragmas, both language
-- and implementation defined. For most pragmas, the parser only does the
-- most basic job of checking the syntax, so Sem_Prag also contains the code
-- to complete the syntax checks. Certain pragmas are handled partially or
-- completely by the parser (see Par.Prag for further details).
with Atree; use Atree;
with Casing; use Casing;
with Csets; use Csets;
with Debug; use Debug;
with Einfo; use Einfo;
with Elists; use Elists;
with Errout; use Errout;
with Exp_Dist; use Exp_Dist;
with Hostparm; use Hostparm;
with Lib; use Lib;
with Lib.Writ; use Lib.Writ;
with Lib.Xref; use Lib.Xref;
with Namet; use Namet;
with Nlists; use Nlists;
with Nmake; use Nmake;
with Opt; use Opt;
with Output; use Output;
with Restrict; use Restrict;
with Rident; use Rident;
with Rtsfind; use Rtsfind;
with Sem; use Sem;
with Sem_Ch3; use Sem_Ch3;
with Sem_Ch8; use Sem_Ch8;
with Sem_Ch13; use Sem_Ch13;
with Sem_Disp; use Sem_Disp;
with Sem_Dist; use Sem_Dist;
with Sem_Elim; use Sem_Elim;
with Sem_Eval; use Sem_Eval;
with Sem_Intr; use Sem_Intr;
with Sem_Mech; use Sem_Mech;
with Sem_Res; use Sem_Res;
with Sem_Type; use Sem_Type;
with Sem_Util; use Sem_Util;
with Sem_VFpt; use Sem_VFpt;
with Sem_Warn; use Sem_Warn;
with Stand; use Stand;
with Sinfo; use Sinfo;
with Sinfo.CN; use Sinfo.CN;
with Sinput; use Sinput;
with Snames; use Snames;
with Stringt; use Stringt;
with Stylesw; use Stylesw;
with Table;
with Targparm; use Targparm;
with Tbuild; use Tbuild;
with Ttypes;
with Uintp; use Uintp;
with Urealp; use Urealp;
with Validsw; use Validsw;
with GNAT.Spelling_Checker; use GNAT.Spelling_Checker;
package body Sem_Prag is
----------------------------------------------
-- Common Handling of Import-Export Pragmas --
----------------------------------------------
-- In the following section, a number of Import_xxx and Export_xxx
-- pragmas are defined by GNAT. These are compatible with the DEC
-- pragmas of the same name, and all have the following common
-- form and processing:
-- pragma Export_xxx
-- [Internal =>] LOCAL_NAME,
-- [, [External =>] EXTERNAL_SYMBOL]
-- [, other optional parameters ]);
-- pragma Import_xxx
-- [Internal =>] LOCAL_NAME,
-- [, [External =>] EXTERNAL_SYMBOL]
-- [, other optional parameters ]);
-- EXTERNAL_SYMBOL ::=
-- IDENTIFIER
-- | static_string_EXPRESSION
-- The internal LOCAL_NAME designates the entity that is imported or
-- exported, and must refer to an entity in the current declarative
-- part (as required by the rules for LOCAL_NAME).
-- The external linker name is designated by the External parameter
-- if given, or the Internal parameter if not (if there is no External
-- parameter, the External parameter is a copy of the Internal name).
-- If the External parameter is given as a string, then this string
-- is treated as an external name (exactly as though it had been given
-- as an External_Name parameter for a normal Import pragma).
-- If the External parameter is given as an identifier (or there is no
-- External parameter, so that the Internal identifier is used), then
-- the external name is the characters of the identifier, translated
-- to all upper case letters for OpenVMS versions of GNAT, and to all
-- lower case letters for all other versions
-- Note: the external name specified or implied by any of these special
-- Import_xxx or Export_xxx pragmas override an external or link name
-- specified in a previous Import or Export pragma.
-- Note: these and all other DEC-compatible GNAT pragmas allow full
-- use of named notation, following the standard rules for subprogram
-- calls, i.e. parameters can be given in any order if named notation
-- is used, and positional and named notation can be mixed, subject to
-- the rule that all positional parameters must appear first.
-- Note: All these pragmas are implemented exactly following the DEC
-- design and implementation and are intended to be fully compatible
-- with the use of these pragmas in the DEC Ada compiler.
--------------------------------------------
-- Checking for Duplicated External Names --
--------------------------------------------
-- It is suspicious if two separate Export pragmas use the same external
-- name. The following table is used to diagnose this situation so that
-- an appropriate warning can be issued.
-- The Node_Id stored is for the N_String_Literal node created to
-- hold the value of the external name. The Sloc of this node is
-- used to cross-reference the location of the duplication.
package Externals is new Table.Table (
Table_Component_Type => Node_Id,
Table_Index_Type => Int,
Table_Low_Bound => 0,
Table_Initial => 100,
Table_Increment => 100,
Table_Name => "Name_Externals");
-------------------------------------
-- Local Subprograms and Variables --
-------------------------------------
function Adjust_External_Name_Case (N : Node_Id) return Node_Id;
-- This routine is used for possible casing adjustment of an explicit
-- external name supplied as a string literal (the node N), according
-- to the casing requirement of Opt.External_Name_Casing. If this is
-- set to As_Is, then the string literal is returned unchanged, but if
-- it is set to Uppercase or Lowercase, then a new string literal with
-- appropriate casing is constructed.
function Get_Base_Subprogram (Def_Id : Entity_Id) return Entity_Id;
-- If Def_Id refers to a renamed subprogram, then the base subprogram
-- (the original one, following the renaming chain) is returned.
-- Otherwise the entity is returned unchanged. Should be in Einfo???
procedure Set_Unit_Name (N : Node_Id; With_Item : Node_Id);
-- Place semantic information on the argument of an Elaborate or
-- Elaborate_All pragma. Entity name for unit and its parents is
-- taken from item in previous with_clause that mentions the unit.
-------------------------------
-- Adjust_External_Name_Case --
-------------------------------
function Adjust_External_Name_Case (N : Node_Id) return Node_Id is
CC : Char_Code;
begin
-- Adjust case of literal if required
if Opt.External_Name_Exp_Casing = As_Is then
return N;
else
-- Copy existing string
Start_String;
-- Set proper casing
for J in 1 .. String_Length (Strval (N)) loop
CC := Get_String_Char (Strval (N), J);
if Opt.External_Name_Exp_Casing = Uppercase
and then CC >= Get_Char_Code ('a')
and then CC <= Get_Char_Code ('z')
then
Store_String_Char (CC - 32);
elsif Opt.External_Name_Exp_Casing = Lowercase
and then CC >= Get_Char_Code ('A')
and then CC <= Get_Char_Code ('Z')
then
Store_String_Char (CC + 32);
else
Store_String_Char (CC);
end if;
end loop;
return
Make_String_Literal (Sloc (N),
Strval => End_String);
end if;
end Adjust_External_Name_Case;
--------------------
-- Analyze_Pragma --
--------------------
procedure Analyze_Pragma (N : Node_Id) is
Loc : constant Source_Ptr := Sloc (N);
Prag_Id : Pragma_Id;
Pragma_Exit : exception;
-- This exception is used to exit pragma processing completely. It
-- is used when an error is detected, and no further processing is
-- required. It is also used if an earlier error has left the tree
-- in a state where the pragma should not be processed.
Arg_Count : Nat;
-- Number of pragma argument associations
Arg1 : Node_Id;
Arg2 : Node_Id;
Arg3 : Node_Id;
Arg4 : Node_Id;
-- First four pragma arguments (pragma argument association nodes,
-- or Empty if the corresponding argument does not exist).
type Name_List is array (Natural range <>) of Name_Id;
type Args_List is array (Natural range <>) of Node_Id;
-- Types used for arguments to Check_Arg_Order and Gather_Associations
procedure Check_Ada_83_Warning;
-- Issues a warning message for the current pragma if operating in Ada
-- 83 mode (used for language pragmas that are not a standard part of
-- Ada 83). This procedure does not raise Error_Pragma. Also notes use
-- of 95 pragma.
procedure Check_Arg_Count (Required : Nat);
-- Check argument count for pragma is equal to given parameter.
-- If not, then issue an error message and raise Pragma_Exit.
-- Note: all routines whose name is Check_Arg_Is_xxx take an
-- argument Arg which can either be a pragma argument association,
-- in which case the check is applied to the expression of the
-- association or an expression directly.
procedure Check_Arg_Is_External_Name (Arg : Node_Id);
-- Check that an argument has the right form for an EXTERNAL_NAME
-- parameter of an extended import/export pragma. The rule is that
-- the name must be an identifier or string literal (in Ada 83 mode)
-- or a static string expression (in Ada 95 mode).
procedure Check_Arg_Is_Identifier (Arg : Node_Id);
-- Check the specified argument Arg to make sure that it is an
-- identifier. If not give error and raise Pragma_Exit.
procedure Check_Arg_Is_Integer_Literal (Arg : Node_Id);
-- Check the specified argument Arg to make sure that it is an
-- integer literal. If not give error and raise Pragma_Exit.
procedure Check_Arg_Is_Library_Level_Local_Name (Arg : Node_Id);
-- Check the specified argument Arg to make sure that it has the
-- proper syntactic form for a local name and meets the semantic
-- requirements for a local name. The local name is analyzed as
-- part of the processing for this call. In addition, the local
-- name is required to represent an entity at the library level.
procedure Check_Arg_Is_Local_Name (Arg : Node_Id);
-- Check the specified argument Arg to make sure that it has the
-- proper syntactic form for a local name and meets the semantic
-- requirements for a local name. The local name is analyzed as
-- part of the processing for this call.
procedure Check_Arg_Is_Locking_Policy (Arg : Node_Id);
-- Check the specified argument Arg to make sure that it is a valid
-- locking policy name. If not give error and raise Pragma_Exit.
procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2 : Name_Id);
procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2, N3 : Name_Id);
-- Check the specified argument Arg to make sure that it is an
-- identifier whose name matches either N1 or N2 (or N3 if present).
-- If not then give error and raise Pragma_Exit.
procedure Check_Arg_Is_Queuing_Policy (Arg : Node_Id);
-- Check the specified argument Arg to make sure that it is a valid
-- queuing policy name. If not give error and raise Pragma_Exit.
procedure Check_Arg_Is_Static_Expression
(Arg : Node_Id;
Typ : Entity_Id);
-- Check the specified argument Arg to make sure that it is a static
-- expression of the given type (i.e. it will be analyzed and resolved
-- using this type, which can be any valid argument to Resolve, e.g.
-- Any_Integer is OK). If not, given error and raise Pragma_Exit.
procedure Check_Arg_Is_String_Literal (Arg : Node_Id);
-- Check the specified argument Arg to make sure that it is a
-- string literal. If not give error and raise Pragma_Exit
procedure Check_Arg_Is_Task_Dispatching_Policy (Arg : Node_Id);
-- Check the specified argument Arg to make sure that it is a valid
-- valid task dispatching policy name. If not give error and raise
-- Pragma_Exit.
procedure Check_Arg_Order (Names : Name_List);
-- Checks for an instance of two arguments with identifiers for the
-- current pragma which are not in the sequence indicated by Names,
-- and if so, generates a fatal message about bad order of arguments.
procedure Check_At_Least_N_Arguments (N : Nat);
-- Check there are at least N arguments present
procedure Check_At_Most_N_Arguments (N : Nat);
-- Check there are no more than N arguments present
procedure Check_Component (Comp : Node_Id);
-- Examine Unchecked_Union component for correct use of per-object
-- constrained subtypes, and for restrictions on finalizable components.
procedure Check_Duplicated_Export_Name (Nam : Node_Id);
-- Nam is an N_String_Literal node containing the external name set
-- by an Import or Export pragma (or extended Import or Export pragma).
-- This procedure checks for possible duplications if this is the
-- export case, and if found, issues an appropriate error message.
procedure Check_First_Subtype (Arg : Node_Id);
-- Checks that Arg, whose expression is an entity name referencing
-- a subtype, does not reference a type that is not a first subtype.
procedure Check_In_Main_Program;
-- Common checks for pragmas that appear within a main program
-- (Priority, Main_Storage, Time_Slice).
procedure Check_Interrupt_Or_Attach_Handler;
-- Common processing for first argument of pragma Interrupt_Handler
-- or pragma Attach_Handler.
procedure Check_Is_In_Decl_Part_Or_Package_Spec;
-- Check that pragma appears in a declarative part, or in a package
-- specification, i.e. that it does not occur in a statement sequence
-- in a body.
procedure Check_No_Identifier (Arg : Node_Id);
-- Checks that the given argument does not have an identifier. If
-- an identifier is present, then an error message is issued, and
-- Pragma_Exit is raised.
procedure Check_No_Identifiers;
-- Checks that none of the arguments to the pragma has an identifier.
-- If any argument has an identifier, then an error message is issued,
-- and Pragma_Exit is raised.
procedure Check_Optional_Identifier (Arg : Node_Id; Id : Name_Id);
-- Checks if the given argument has an identifier, and if so, requires
-- it to match the given identifier name. If there is a non-matching
-- identifier, then an error message is given and Error_Pragmas raised.
procedure Check_Optional_Identifier (Arg : Node_Id; Id : String);
-- Checks if the given argument has an identifier, and if so, requires
-- it to match the given identifier name. If there is a non-matching
-- identifier, then an error message is given and Error_Pragmas raised.
-- In this version of the procedure, the identifier name is given as
-- a string with lower case letters.
procedure Check_Static_Constraint (Constr : Node_Id);
-- Constr is a constraint from an N_Subtype_Indication node from a
-- component constraint in an Unchecked_Union type. This routine checks
-- that the constraint is static as required by the restrictions for
-- Unchecked_Union.
procedure Check_Valid_Configuration_Pragma;
-- Legality checks for placement of a configuration pragma
procedure Check_Valid_Library_Unit_Pragma;
-- Legality checks for library unit pragmas. A special case arises for
-- pragmas in generic instances that come from copies of the original
-- library unit pragmas in the generic templates. In the case of other
-- than library level instantiations these can appear in contexts which
-- would normally be invalid (they only apply to the original template
-- and to library level instantiations), and they are simply ignored,
-- which is implemented by rewriting them as null statements.
procedure Check_Variant (Variant : Node_Id);
-- Check Unchecked_Union variant for lack of nested variants and
-- presence of at least one component.
procedure Error_Pragma (Msg : String);
pragma No_Return (Error_Pragma);
-- Outputs error message for current pragma. The message contains an %
-- that will be replaced with the pragma name, and the flag is placed
-- on the pragma itself. Pragma_Exit is then raised.
procedure Error_Pragma_Arg (Msg : String; Arg : Node_Id);
pragma No_Return (Error_Pragma_Arg);
-- Outputs error message for current pragma. The message may contain
-- a % that will be replaced with the pragma name. The parameter Arg
-- may either be a pragma argument association, in which case the flag
-- is placed on the expression of this association, or an expression,
-- in which case the flag is placed directly on the expression. The
-- message is placed using Error_Msg_N, so the message may also contain
-- an & insertion character which will reference the given Arg value.
-- After placing the message, Pragma_Exit is raised.
procedure Error_Pragma_Arg (Msg1, Msg2 : String; Arg : Node_Id);
pragma No_Return (Error_Pragma_Arg);
-- Similar to above form of Error_Pragma_Arg except that two messages
-- are provided, the second is a continuation comment starting with \.
procedure Error_Pragma_Arg_Ident (Msg : String; Arg : Node_Id);
pragma No_Return (Error_Pragma_Arg_Ident);
-- Outputs error message for current pragma. The message may contain
-- a % that will be replaced with the pragma name. The parameter Arg
-- must be a pragma argument association with a non-empty identifier
-- (i.e. its Chars field must be set), and the error message is placed
-- on the identifier. The message is placed using Error_Msg_N so
-- the message may also contain an & insertion character which will
-- reference the identifier. After placing the message, Pragma_Exit
-- is raised.
function Find_Lib_Unit_Name return Entity_Id;
-- Used for a library unit pragma to find the entity to which the
-- library unit pragma applies, returns the entity found.
procedure Find_Program_Unit_Name (Id : Node_Id);
-- If the pragma is a compilation unit pragma, the id must denote the
-- compilation unit in the same compilation, and the pragma must appear
-- in the list of preceding or trailing pragmas. If it is a program
-- unit pragma that is not a compilation unit pragma, then the
-- identifier must be visible.
function Find_Unique_Parameterless_Procedure
(Name : Entity_Id;
Arg : Node_Id) return Entity_Id;
-- Used for a procedure pragma to find the unique parameterless
-- procedure identified by Name, returns it if it exists, otherwise
-- errors out and uses Arg as the pragma argument for the message.
procedure Gather_Associations
(Names : Name_List;
Args : out Args_List);
-- This procedure is used to gather the arguments for a pragma that
-- permits arbitrary ordering of parameters using the normal rules
-- for named and positional parameters. The Names argument is a list
-- of Name_Id values that corresponds to the allowed pragma argument
-- association identifiers in order. The result returned in Args is
-- a list of corresponding expressions that are the pragma arguments.
-- Note that this is a list of expressions, not of pragma argument
-- associations (Gather_Associations has completely checked all the
-- optional identifiers when it returns). An entry in Args is Empty
-- on return if the corresponding argument is not present.
function Get_Pragma_Arg (Arg : Node_Id) return Node_Id;
-- All the routines that check pragma arguments take either a pragma
-- argument association (in which case the expression of the argument
-- association is checked), or the expression directly. The function
-- Get_Pragma_Arg is a utility used to deal with these two cases. If
-- Arg is a pragma argument association node, then its expression is
-- returned, otherwise Arg is returned unchanged.
procedure GNAT_Pragma;
-- Called for all GNAT defined pragmas to note the use of the feature,
-- and also check the relevant restriction (No_Implementation_Pragmas).
function Is_Before_First_Decl
(Pragma_Node : Node_Id;
Decls : List_Id) return Boolean;
-- Return True if Pragma_Node is before the first declarative item in
-- Decls where Decls is the list of declarative items.
function Is_Configuration_Pragma return Boolean;
-- Deterermines if the placement of the current pragma is appropriate
-- for a configuration pragma (precedes the current compilation unit)
procedure Pragma_Misplaced;
-- Issue fatal error message for misplaced pragma
procedure Process_Atomic_Shared_Volatile;
-- Common processing for pragmas Atomic, Shared, Volatile. Note that
-- Shared is an obsolete Ada 83 pragma, treated as being identical
-- in effect to pragma Atomic.
procedure Process_Convention (C : out Convention_Id; E : out Entity_Id);
-- Common procesing for Convention, Interface, Import and Export.
-- Checks first two arguments of pragma, and sets the appropriate
-- convention value in the specified entity or entities. On return
-- C is the convention, E is the referenced entity.
procedure Process_Extended_Import_Export_Exception_Pragma
(Arg_Internal : Node_Id;
Arg_External : Node_Id;
Arg_Form : Node_Id;
Arg_Code : Node_Id);
-- Common processing for the pragmas Import/Export_Exception.
-- The three arguments correspond to the three named parameters of
-- the pragma. An argument is empty if the corresponding parameter
-- is not present in the pragma.
procedure Process_Extended_Import_Export_Object_Pragma
(Arg_Internal : Node_Id;
Arg_External : Node_Id;
Arg_Size : Node_Id);
-- Common processing for the pragmass Import/Export_Object.
-- The three arguments correspond to the three named parameters
-- of the pragmas. An argument is empty if the corresponding
-- parameter is not present in the pragma.
procedure Process_Extended_Import_Export_Internal_Arg
(Arg_Internal : Node_Id := Empty);
-- Common processing for all extended Import and Export pragmas. The
-- argument is the pragma parameter for the Internal argument. If
-- Arg_Internal is empty or inappropriate, an error message is posted.
-- Otherwise, on normal return, the Entity_Field of Arg_Internal is
-- set to identify the referenced entity.
procedure Process_Extended_Import_Export_Subprogram_Pragma
(Arg_Internal : Node_Id;
Arg_External : Node_Id;
Arg_Parameter_Types : Node_Id;
Arg_Result_Type : Node_Id := Empty;
Arg_Mechanism : Node_Id;
Arg_Result_Mechanism : Node_Id := Empty;
Arg_First_Optional_Parameter : Node_Id := Empty);
-- Common processing for all extended Import and Export pragmas
-- applying to subprograms. The caller omits any arguments that do
-- bnot apply to the pragma in question (for example, Arg_Result_Type
-- can be non-Empty only in the Import_Function and Export_Function
-- cases). The argument names correspond to the allowed pragma
-- association identifiers.
procedure Process_Generic_List;
-- Common processing for Share_Generic and Inline_Generic
procedure Process_Import_Or_Interface;
-- Common processing for Import of Interface
procedure Process_Inline (Active : Boolean);
-- Common processing for Inline and Inline_Always. The parameter
-- indicates if the inline pragma is active, i.e. if it should
-- actually cause inlining to occur.
procedure Process_Interface_Name
(Subprogram_Def : Entity_Id;
Ext_Arg : Node_Id;
Link_Arg : Node_Id);
-- Given the last two arguments of pragma Import, pragma Export, or
-- pragma Interface_Name, performs validity checks and sets the
-- Interface_Name field of the given subprogram entity to the
-- appropriate external or link name, depending on the arguments
-- given. Ext_Arg is always present, but Link_Arg may be missing.
-- Note that Ext_Arg may represent the Link_Name if Link_Arg is
-- missing, and appropriate named notation is used for Ext_Arg.
-- If neither Ext_Arg nor Link_Arg is present, the interface name
-- is set to the default from the subprogram name.
procedure Process_Interrupt_Or_Attach_Handler;
-- Common processing for Interrupt and Attach_Handler pragmas
procedure Process_Restrictions_Or_Restriction_Warnings;
-- Common processing for Restrictions and Restriction_Warnings pragmas
procedure Process_Suppress_Unsuppress (Suppress_Case : Boolean);
-- Common processing for Suppress and Unsuppress. The boolean parameter
-- Suppress_Case is True for the Suppress case, and False for the
-- Unsuppress case.
procedure Set_Exported (E : Entity_Id; Arg : Node_Id);
-- This procedure sets the Is_Exported flag for the given entity,
-- checking that the entity was not previously imported. Arg is
-- the argument that specified the entity. A check is also made
-- for exporting inappropriate entities.
procedure Set_Extended_Import_Export_External_Name
(Internal_Ent : Entity_Id;
Arg_External : Node_Id);
-- Common processing for all extended import export pragmas. The first
-- argument, Internal_Ent, is the internal entity, which has already
-- been checked for validity by the caller. Arg_External is from the
-- Import or Export pragma, and may be null if no External parameter
-- was present. If Arg_External is present and is a non-null string
-- (a null string is treated as the default), then the Interface_Name
-- field of Internal_Ent is set appropriately.
procedure Set_Imported (E : Entity_Id);
-- This procedure sets the Is_Imported flag for the given entity,
-- checking that it is not previously exported or imported.
procedure Set_Mechanism_Value (Ent : Entity_Id; Mech_Name : Node_Id);
-- Mech is a parameter passing mechanism (see Import_Function syntax
-- for MECHANISM_NAME). This routine checks that the mechanism argument
-- has the right form, and if not issues an error message. If the
-- argument has the right form then the Mechanism field of Ent is
-- set appropriately.
procedure Set_Ravenscar_Profile (N : Node_Id);
-- Activate the set of configuration pragmas and restrictions that
-- make up the Ravenscar Profile. N is the corresponding pragma
-- node, which is used for error messages on any constructs
-- that violate the profile.
--------------------------
-- Check_Ada_83_Warning --
--------------------------
procedure Check_Ada_83_Warning is
begin
if Ada_Version = Ada_83 and then Comes_From_Source (N) then
Error_Msg_N ("(Ada 83) pragma& is non-standard?", N);
end if;
end Check_Ada_83_Warning;
---------------------
-- Check_Arg_Count --
---------------------
procedure Check_Arg_Count (Required : Nat) is
begin
if Arg_Count /= Required then
Error_Pragma ("wrong number of arguments for pragma%");
end if;
end Check_Arg_Count;
--------------------------------
-- Check_Arg_Is_External_Name --
--------------------------------
procedure Check_Arg_Is_External_Name (Arg : Node_Id) is
Argx : constant Node_Id := Get_Pragma_Arg (Arg);
begin
if Nkind (Argx) = N_Identifier then
return;
else
Analyze_And_Resolve (Argx, Standard_String);
if Is_OK_Static_Expression (Argx) then
return;
elsif Etype (Argx) = Any_Type then
raise Pragma_Exit;
-- An interesting special case, if we have a string literal and
-- we are in Ada 83 mode, then we allow it even though it will
-- not be flagged as static. This allows expected Ada 83 mode
-- use of external names which are string literals, even though
-- technically these are not static in Ada 83.
elsif Ada_Version = Ada_83
and then Nkind (Argx) = N_String_Literal
then
return;
-- Static expression that raises Constraint_Error. This has
-- already been flagged, so just exit from pragma processing.
elsif Is_Static_Expression (Argx) then
raise Pragma_Exit;
-- Here we have a real error (non-static expression)
else
Error_Msg_Name_1 := Chars (N);
Flag_Non_Static_Expr
("argument for pragma% must be a identifier or " &
"static string expression!", Argx);
raise Pragma_Exit;
end if;
end if;
end Check_Arg_Is_External_Name;
-----------------------------
-- Check_Arg_Is_Identifier --
-----------------------------
procedure Check_Arg_Is_Identifier (Arg : Node_Id) is
Argx : constant Node_Id := Get_Pragma_Arg (Arg);
begin
if Nkind (Argx) /= N_Identifier then
Error_Pragma_Arg
("argument for pragma% must be identifier", Argx);
end if;
end Check_Arg_Is_Identifier;
----------------------------------
-- Check_Arg_Is_Integer_Literal --
----------------------------------
procedure Check_Arg_Is_Integer_Literal (Arg : Node_Id) is
Argx : constant Node_Id := Get_Pragma_Arg (Arg);
begin
if Nkind (Argx) /= N_Integer_Literal then
Error_Pragma_Arg
("argument for pragma% must be integer literal", Argx);
end if;
end Check_Arg_Is_Integer_Literal;
-------------------------------------------
-- Check_Arg_Is_Library_Level_Local_Name --
-------------------------------------------
-- LOCAL_NAME ::=
-- DIRECT_NAME
-- | DIRECT_NAME'ATTRIBUTE_DESIGNATOR
-- | library_unit_NAME
procedure Check_Arg_Is_Library_Level_Local_Name (Arg : Node_Id) is
begin
Check_Arg_Is_Local_Name (Arg);
if not Is_Library_Level_Entity (Entity (Expression (Arg)))
and then Comes_From_Source (N)
then
Error_Pragma_Arg
("argument for pragma% must be library level entity", Arg);
end if;
end Check_Arg_Is_Library_Level_Local_Name;
-----------------------------
-- Check_Arg_Is_Local_Name --
-----------------------------
-- LOCAL_NAME ::=
-- DIRECT_NAME
-- | DIRECT_NAME'ATTRIBUTE_DESIGNATOR
-- | library_unit_NAME
procedure Check_Arg_Is_Local_Name (Arg : Node_Id) is
Argx : constant Node_Id := Get_Pragma_Arg (Arg);
begin
Analyze (Argx);
if Nkind (Argx) not in N_Direct_Name
and then (Nkind (Argx) /= N_Attribute_Reference
or else Present (Expressions (Argx))
or else Nkind (Prefix (Argx)) /= N_Identifier)
and then (not Is_Entity_Name (Argx)
or else not Is_Compilation_Unit (Entity (Argx)))
then
Error_Pragma_Arg ("argument for pragma% must be local name", Argx);
end if;
if Is_Entity_Name (Argx)
and then Scope (Entity (Argx)) /= Current_Scope
then
Error_Pragma_Arg
("pragma% argument must be in same declarative part", Arg);
end if;
end Check_Arg_Is_Local_Name;
---------------------------------
-- Check_Arg_Is_Locking_Policy --
---------------------------------
procedure Check_Arg_Is_Locking_Policy (Arg : Node_Id) is
Argx : constant Node_Id := Get_Pragma_Arg (Arg);
begin
Check_Arg_Is_Identifier (Argx);
if not Is_Locking_Policy_Name (Chars (Argx)) then
Error_Pragma_Arg
("& is not a valid locking policy name", Argx);
end if;
end Check_Arg_Is_Locking_Policy;
-------------------------
-- Check_Arg_Is_One_Of --
-------------------------
procedure Check_Arg_Is_One_Of (Arg : Node_Id; N1, N2 : Name_Id) is
Argx : constant Node_Id := Get_Pragma_Arg (Arg);
begin
Check_Arg_Is_Identifier (Argx);
if Chars (Argx) /= N1 and then Chars (Argx) /= N2 then
Error_Msg_Name_2 := N1;
Error_Msg_Name_3 := N2;
Error_Pragma_Arg ("argument for pragma% must be% or%", Argx);
end if;
end Check_Arg_Is_One_Of;
procedure Check_Arg_Is_One_Of
(Arg : Node_Id;
N1, N2, N3 : Name_Id)
is
Argx : constant Node_Id := Get_Pragma_Arg (Arg);
begin
Check_Arg_Is_Identifier (Argx);
if Chars (Argx) /= N1
and then Chars (Argx) /= N2
and then Chars (Argx) /= N3
then
Error_Pragma_Arg ("invalid argument for pragma%", Argx);
end if;
end Check_Arg_Is_One_Of;
---------------------------------
-- Check_Arg_Is_Queuing_Policy --
---------------------------------
procedure Check_Arg_Is_Queuing_Policy (Arg : Node_Id) is
Argx : constant Node_Id := Get_Pragma_Arg (Arg);
begin
Check_Arg_Is_Identifier (Argx);
if not Is_Queuing_Policy_Name (Chars (Argx)) then
Error_Pragma_Arg
("& is not a valid queuing policy name", Argx);
end if;
end Check_Arg_Is_Queuing_Policy;
------------------------------------
-- Check_Arg_Is_Static_Expression --
------------------------------------
procedure Check_Arg_Is_Static_Expression
(Arg : Node_Id;
Typ : Entity_Id)
is
Argx : constant Node_Id := Get_Pragma_Arg (Arg);
begin
Analyze_And_Resolve (Argx, Typ);
if Is_OK_Static_Expression (Argx) then
return;
elsif Etype (Argx) = Any_Type then
raise Pragma_Exit;
-- An interesting special case, if we have a string literal and
-- we are in Ada 83 mode, then we allow it even though it will
-- not be flagged as static. This allows the use of Ada 95
-- pragmas like Import in Ada 83 mode. They will of course be
-- flagged with warnings as usual, but will not cause errors.
elsif Ada_Version = Ada_83
and then Nkind (Argx) = N_String_Literal
then
return;
-- Static expression that raises Constraint_Error. This has
-- already been flagged, so just exit from pragma processing.
elsif Is_Static_Expression (Argx) then
raise Pragma_Exit;
-- Finally, we have a real error
else
Error_Msg_Name_1 := Chars (N);
Flag_Non_Static_Expr
("argument for pragma% must be a static expression!", Argx);
raise Pragma_Exit;
end if;
end Check_Arg_Is_Static_Expression;
---------------------------------
-- Check_Arg_Is_String_Literal --
---------------------------------
procedure Check_Arg_Is_String_Literal (Arg : Node_Id) is
Argx : constant Node_Id := Get_Pragma_Arg (Arg);
begin
if Nkind (Argx) /= N_String_Literal then
Error_Pragma_Arg
("argument for pragma% must be string literal", Argx);
end if;
end Check_Arg_Is_String_Literal;
------------------------------------------
-- Check_Arg_Is_Task_Dispatching_Policy --
------------------------------------------
procedure Check_Arg_Is_Task_Dispatching_Policy (Arg : Node_Id) is
Argx : constant Node_Id := Get_Pragma_Arg (Arg);
begin
Check_Arg_Is_Identifier (Argx);
if not Is_Task_Dispatching_Policy_Name (Chars (Argx)) then
Error_Pragma_Arg
("& is not a valid task dispatching policy name", Argx);
end if;
end Check_Arg_Is_Task_Dispatching_Policy;
---------------------
-- Check_Arg_Order --
---------------------
procedure Check_Arg_Order (Names : Name_List) is
Arg : Node_Id;
Highest_So_Far : Natural := 0;
-- Highest index in Names seen do far
begin
Arg := Arg1;
for J in 1 .. Arg_Count loop
if Chars (Arg) /= No_Name then
for K in Names'Range loop
if Chars (Arg) = Names (K) then
if K < Highest_So_Far then
Error_Msg_Name_1 := Chars (N);
Error_Msg_N
("parameters out of order for pragma%", Arg);
Error_Msg_Name_1 := Names (K);
Error_Msg_Name_2 := Names (Highest_So_Far);
Error_Msg_N ("\% must appear before %", Arg);
raise Pragma_Exit;
else
Highest_So_Far := K;
end if;
end if;
end loop;
end if;
Arg := Next (Arg);
end loop;
end Check_Arg_Order;
--------------------------------
-- Check_At_Least_N_Arguments --
--------------------------------
procedure Check_At_Least_N_Arguments (N : Nat) is
begin
if Arg_Count < N then
Error_Pragma ("too few arguments for pragma%");
end if;
end Check_At_Least_N_Arguments;
-------------------------------
-- Check_At_Most_N_Arguments --
-------------------------------
procedure Check_At_Most_N_Arguments (N : Nat) is
Arg : Node_Id;
begin
if Arg_Count > N then
Arg := Arg1;
for J in 1 .. N loop
Next (Arg);
Error_Pragma_Arg ("too many arguments for pragma%", Arg);
end loop;
end if;
end Check_At_Most_N_Arguments;
---------------------
-- Check_Component --
---------------------
procedure Check_Component (Comp : Node_Id) is
begin
if Nkind (Comp) = N_Component_Declaration then
declare
Sindic : constant Node_Id :=
Subtype_Indication (Component_Definition (Comp));
Typ : constant Entity_Id :=
Etype (Defining_Identifier (Comp));
begin
if Nkind (Sindic) = N_Subtype_Indication then
-- Ada 2005 (AI-216): If a component subtype is subject to
-- a per-object constraint, then the component type shall
-- be an Unchecked_Union.
if Has_Per_Object_Constraint (Defining_Identifier (Comp))
and then
not Is_Unchecked_Union (Etype (Subtype_Mark (Sindic)))
then
Error_Msg_N ("component subtype subject to per-object" &
" constraint must be an Unchecked_Union", Comp);
end if;
end if;
if Is_Controlled (Typ) then
Error_Msg_N
("component of unchecked union cannot be controlled", Comp);
elsif Has_Task (Typ) then
Error_Msg_N
("component of unchecked union cannot have tasks", Comp);
end if;
end;
end if;
end Check_Component;
----------------------------------
-- Check_Duplicated_Export_Name --
----------------------------------
procedure Check_Duplicated_Export_Name (Nam : Node_Id) is
String_Val : constant String_Id := Strval (Nam);
begin
-- We are only interested in the export case, and in the case of
-- generics, it is the instance, not the template, that is the
-- problem (the template will generate a warning in any case).
if not Inside_A_Generic
and then (Prag_Id = Pragma_Export
or else
Prag_Id = Pragma_Export_Procedure
or else
Prag_Id = Pragma_Export_Valued_Procedure
or else
Prag_Id = Pragma_Export_Function)
then
for J in Externals.First .. Externals.Last loop
if String_Equal (String_Val, Strval (Externals.Table (J))) then
Error_Msg_Sloc := Sloc (Externals.Table (J));
Error_Msg_N ("external name duplicates name given#", Nam);
exit;
end if;
end loop;
Externals.Append (Nam);
end if;
end Check_Duplicated_Export_Name;
-------------------------
-- Check_First_Subtype --
-------------------------
procedure Check_First_Subtype (Arg : Node_Id) is
Argx : constant Node_Id := Get_Pragma_Arg (Arg);
begin
if not Is_First_Subtype (Entity (Argx)) then
Error_Pragma_Arg
("pragma% cannot apply to subtype", Argx);
end if;
end Check_First_Subtype;
---------------------------
-- Check_In_Main_Program --
---------------------------
procedure Check_In_Main_Program is
P : constant Node_Id := Parent (N);
begin
-- Must be at in subprogram body
if Nkind (P) /= N_Subprogram_Body then
Error_Pragma ("% pragma allowed only in subprogram");
-- Otherwise warn if obviously not main program
elsif Present (Parameter_Specifications (Specification (P)))
or else not Is_Compilation_Unit (Defining_Entity (P))
then
Error_Msg_Name_1 := Chars (N);
Error_Msg_N
("?pragma% is only effective in main program", N);
end if;
end Check_In_Main_Program;
---------------------------------------
-- Check_Interrupt_Or_Attach_Handler --
---------------------------------------
procedure Check_Interrupt_Or_Attach_Handler is
Arg1_X : constant Node_Id := Expression (Arg1);
Handler_Proc, Proc_Scope : Entity_Id;
begin
Analyze (Arg1_X);
if Prag_Id = Pragma_Interrupt_Handler then
Check_Restriction (No_Dynamic_Attachment, N);
end if;
Handler_Proc := Find_Unique_Parameterless_Procedure (Arg1_X, Arg1);
Proc_Scope := Scope (Handler_Proc);
-- On AAMP only, a pragma Interrupt_Handler is supported for
-- nonprotected parameterless procedures.
if not AAMP_On_Target
or else Prag_Id = Pragma_Attach_Handler
then
if Ekind (Proc_Scope) /= E_Protected_Type then
Error_Pragma_Arg
("argument of pragma% must be protected procedure", Arg1);
end if;
if Parent (N) /= Protected_Definition (Parent (Proc_Scope)) then
Error_Pragma ("pragma% must be in protected definition");
end if;
end if;
if not Is_Library_Level_Entity (Proc_Scope)
or else (AAMP_On_Target
and then not Is_Library_Level_Entity (Handler_Proc))
then
Error_Pragma_Arg
("argument for pragma% must be library level entity", Arg1);
end if;
end Check_Interrupt_Or_Attach_Handler;
-------------------------------------------
-- Check_Is_In_Decl_Part_Or_Package_Spec --
-------------------------------------------
procedure Check_Is_In_Decl_Part_Or_Package_Spec is
P : Node_Id;
begin
P := Parent (N);
loop
if No (P) then
exit;
elsif Nkind (P) = N_Handled_Sequence_Of_Statements then
exit;
elsif Nkind (P) = N_Package_Specification then
return;
elsif Nkind (P) = N_Block_Statement then
return;
-- Note: the following tests seem a little peculiar, because
-- they test for bodies, but if we were in the statement part
-- of the body, we would already have hit the handled statement
-- sequence, so the only way we get here is by being in the
-- declarative part of the body.
elsif Nkind (P) = N_Subprogram_Body
or else Nkind (P) = N_Package_Body
or else Nkind (P) = N_Task_Body
or else Nkind (P) = N_Entry_Body
then
return;
end if;
P := Parent (P);
end loop;
Error_Pragma ("pragma% is not in declarative part or package spec");
end Check_Is_In_Decl_Part_Or_Package_Spec;
-------------------------
-- Check_No_Identifier --
-------------------------
procedure Check_No_Identifier (Arg : Node_Id) is
begin
if Chars (Arg) /= No_Name then
Error_Pragma_Arg_Ident
("pragma% does not permit identifier& here", Arg);
end if;
end Check_No_Identifier;
--------------------------
-- Check_No_Identifiers --
--------------------------
procedure Check_No_Identifiers is
Arg_Node : Node_Id;
begin
if Arg_Count > 0 then
Arg_Node := Arg1;
while Present (Arg_Node) loop
Check_No_Identifier (Arg_Node);
Next (Arg_Node);
end loop;
end if;
end Check_No_Identifiers;
-------------------------------
-- Check_Optional_Identifier --
-------------------------------
procedure Check_Optional_Identifier (Arg : Node_Id; Id : Name_Id) is
begin
if Present (Arg) and then Chars (Arg) /= No_Name then
if Chars (Arg) /= Id then
Error_Msg_Name_1 := Chars (N);
Error_Msg_Name_2 := Id;
Error_Msg_N ("pragma% argument expects identifier%", Arg);
raise Pragma_Exit;
end if;
end if;
end Check_Optional_Identifier;
procedure Check_Optional_Identifier (Arg : Node_Id; Id : String) is
begin
Name_Buffer (1 .. Id'Length) := Id;
Name_Len := Id'Length;
Check_Optional_Identifier (Arg, Name_Find);
end Check_Optional_Identifier;
-----------------------------
-- Check_Static_Constraint --
-----------------------------
-- Note: for convenience in writing this procedure, in addition to
-- the officially (i.e. by spec) allowed argument which is always
-- a constraint, it also allows ranges and discriminant associations.
-- Above is not clear ???
procedure Check_Static_Constraint (Constr : Node_Id) is
--------------------
-- Require_Static --
--------------------
procedure Require_Static (E : Node_Id);
-- Require given expression to be static expression
procedure Require_Static (E : Node_Id) is
begin
if not Is_OK_Static_Expression (E) then
Flag_Non_Static_Expr
("non-static constraint not allowed in Unchecked_Union!", E);
raise Pragma_Exit;
end if;
end Require_Static;
-- Start of processing for Check_Static_Constraint
begin
case Nkind (Constr) is
when N_Discriminant_Association =>
Require_Static (Expression (Constr));
when N_Range =>
Require_Static (Low_Bound (Constr));
Require_Static (High_Bound (Constr));
when N_Attribute_Reference =>
Require_Static (Type_Low_Bound (Etype (Prefix (Constr))));
Require_Static (Type_High_Bound (Etype (Prefix (Constr))));
when N_Range_Constraint =>
Check_Static_Constraint (Range_Expression (Constr));
when N_Index_Or_Discriminant_Constraint =>
declare
IDC : Entity_Id;
begin
IDC := First (Constraints (Constr));
while Present (IDC) loop
Check_Static_Constraint (IDC);
Next (IDC);
end loop;
end;
when others =>
null;
end case;
end Check_Static_Constraint;
--------------------------------------
-- Check_Valid_Configuration_Pragma --
--------------------------------------
-- A configuration pragma must appear in the context clause of
-- a compilation unit, at the start of the list (i.e. only other
-- pragmas may precede it).
procedure Check_Valid_Configuration_Pragma is
begin
if not Is_Configuration_Pragma then
Error_Pragma ("incorrect placement for configuration pragma%");
end if;
end Check_Valid_Configuration_Pragma;
-------------------------------------
-- Check_Valid_Library_Unit_Pragma --
-------------------------------------
procedure Check_Valid_Library_Unit_Pragma is
Plist : List_Id;
Parent_Node : Node_Id;
Unit_Name : Entity_Id;
Unit_Kind : Node_Kind;
Unit_Node : Node_Id;
Sindex : Source_File_Index;
begin
if not Is_List_Member (N) then
Pragma_Misplaced;
else
Plist := List_Containing (N);
Parent_Node := Parent (Plist);
if Parent_Node = Empty then
Pragma_Misplaced;
-- Case of pragma appearing after a compilation unit. In this
-- case it must have an argument with the corresponding name
-- and must be part of the following pragmas of its parent.
elsif Nkind (Parent_Node) = N_Compilation_Unit_Aux then
if Plist /= Pragmas_After (Parent_Node) then
Pragma_Misplaced;
elsif Arg_Count = 0 then
Error_Pragma
("argument required if outside compilation unit");
else
Check_No_Identifiers;
Check_Arg_Count (1);
Unit_Node := Unit (Parent (Parent_Node));
Unit_Kind := Nkind (Unit_Node);
Analyze (Expression (Arg1));
if Unit_Kind = N_Generic_Subprogram_Declaration
or else Unit_Kind = N_Subprogram_Declaration
then
Unit_Name := Defining_Entity (Unit_Node);
elsif Unit_Kind in N_Generic_Instantiation then
Unit_Name := Defining_Entity (Unit_Node);
else
Unit_Name := Cunit_Entity (Current_Sem_Unit);
end if;
if Chars (Unit_Name) /=
Chars (Entity (Expression (Arg1)))
then
Error_Pragma_Arg
("pragma% argument is not current unit name", Arg1);
end if;
if Ekind (Unit_Name) = E_Package
and then Present (Renamed_Entity (Unit_Name))
then
Error_Pragma ("pragma% not allowed for renamed package");
end if;
end if;
-- Pragma appears other than after a compilation unit
else
-- Here we check for the generic instantiation case and also
-- for the case of processing a generic formal package. We
-- detect these cases by noting that the Sloc on the node
-- does not belong to the current compilation unit.
Sindex := Source_Index (Current_Sem_Unit);
if Loc not in Source_First (Sindex) .. Source_Last (Sindex) then
Rewrite (N, Make_Null_Statement (Loc));
return;
-- If before first declaration, the pragma applies to the
-- enclosing unit, and the name if present must be this name.
elsif Is_Before_First_Decl (N, Plist) then
Unit_Node := Unit_Declaration_Node (Current_Scope);
Unit_Kind := Nkind (Unit_Node);
if Nkind (Parent (Unit_Node)) /= N_Compilation_Unit then
Pragma_Misplaced;
elsif Unit_Kind = N_Subprogram_Body
and then not Acts_As_Spec (Unit_Node)
then
Pragma_Misplaced;
elsif Nkind (Parent_Node) = N_Package_Body then
Pragma_Misplaced;
elsif Nkind (Parent_Node) = N_Package_Specification
and then Plist = Private_Declarations (Parent_Node)
then
Pragma_Misplaced;
elsif (Nkind (Parent_Node) = N_Generic_Package_Declaration
or else Nkind (Parent_Node)
= N_Generic_Subprogram_Declaration)
and then Plist = Generic_Formal_Declarations (Parent_Node)
then
Pragma_Misplaced;
elsif Arg_Count > 0 then
Analyze (Expression (Arg1));
if Entity (Expression (Arg1)) /= Current_Scope then
Error_Pragma_Arg
("name in pragma% must be enclosing unit", Arg1);
end if;
-- It is legal to have no argument in this context
else
return;
end if;
-- Error if not before first declaration. This is because a
-- library unit pragma argument must be the name of a library
-- unit (RM 10.1.5(7)), but the only names permitted in this
-- context are (RM 10.1.5(6)) names of subprogram declarations,
-- generic subprogram declarations or generic instantiations.
else
Error_Pragma
("pragma% misplaced, must be before first declaration");
end if;
end if;
end if;
end Check_Valid_Library_Unit_Pragma;
-------------------
-- Check_Variant --
-------------------
procedure Check_Variant (Variant : Node_Id) is
Clist : constant Node_Id := Component_List (Variant);
Comp : Node_Id;
begin
if not Is_Non_Empty_List (Component_Items (Clist)) then
Error_Msg_N
("Unchecked_Union may not have empty component list",
Variant);
return;
end if;
Comp := First (Component_Items (Clist));
while Present (Comp) loop
Check_Component (Comp);
Next (Comp);
end loop;
end Check_Variant;
------------------
-- Error_Pragma --
------------------
procedure Error_Pragma (Msg : String) is
begin
Error_Msg_Name_1 := Chars (N);
Error_Msg_N (Msg, N);
raise Pragma_Exit;
end Error_Pragma;
----------------------
-- Error_Pragma_Arg --
----------------------
procedure Error_Pragma_Arg (Msg : String; Arg : Node_Id) is
begin
Error_Msg_Name_1 := Chars (N);
Error_Msg_N (Msg, Get_Pragma_Arg (Arg));
raise Pragma_Exit;
end Error_Pragma_Arg;
procedure Error_Pragma_Arg (Msg1, Msg2 : String; Arg : Node_Id) is
begin
Error_Msg_Name_1 := Chars (N);
Error_Msg_N (Msg1, Get_Pragma_Arg (Arg));
Error_Pragma_Arg (Msg2, Arg);
end Error_Pragma_Arg;
----------------------------
-- Error_Pragma_Arg_Ident --
----------------------------
procedure Error_Pragma_Arg_Ident (Msg : String; Arg : Node_Id) is
begin
Error_Msg_Name_1 := Chars (N);
Error_Msg_N (Msg, Arg);
raise Pragma_Exit;
end Error_Pragma_Arg_Ident;
------------------------
-- Find_Lib_Unit_Name --
------------------------
function Find_Lib_Unit_Name return Entity_Id is
begin
-- Return inner compilation unit entity, for case of nested
-- categorization pragmas. This happens in generic unit.
if Nkind (Parent (N)) = N_Package_Specification
and then Defining_Entity (Parent (N)) /= Current_Scope
then
return Defining_Entity (Parent (N));
else
return Current_Scope;
end if;
end Find_Lib_Unit_Name;
----------------------------
-- Find_Program_Unit_Name --
----------------------------
procedure Find_Program_Unit_Name (Id : Node_Id) is
Unit_Name : Entity_Id;
Unit_Kind : Node_Kind;
P : constant Node_Id := Parent (N);
begin
if Nkind (P) = N_Compilation_Unit then
Unit_Kind := Nkind (Unit (P));
if Unit_Kind = N_Subprogram_Declaration
or else Unit_Kind = N_Package_Declaration
or else Unit_Kind in N_Generic_Declaration
then
Unit_Name := Defining_Entity (Unit (P));
if Chars (Id) = Chars (Unit_Name) then
Set_Entity (Id, Unit_Name);
Set_Etype (Id, Etype (Unit_Name));
else
Set_Etype (Id, Any_Type);
Error_Pragma
("cannot find program unit referenced by pragma%");
end if;
else
Set_Etype (Id, Any_Type);
Error_Pragma ("pragma% inapplicable to this unit");
end if;
else
Analyze (Id);
end if;
end Find_Program_Unit_Name;
-----------------------------------------
-- Find_Unique_Parameterless_Procedure --
-----------------------------------------
function Find_Unique_Parameterless_Procedure
(Name : Entity_Id;
Arg : Node_Id) return Entity_Id
is
Proc : Entity_Id := Empty;
begin
-- The body of this procedure needs some comments ???
if not Is_Entity_Name (Name) then
Error_Pragma_Arg
("argument of pragma% must be entity name", Arg);
elsif not Is_Overloaded (Name) then
Proc := Entity (Name);
if Ekind (Proc) /= E_Procedure
or else Present (First_Formal (Proc)) then
Error_Pragma_Arg
("argument of pragma% must be parameterless procedure", Arg);
end if;
else
declare
Found : Boolean := False;
It : Interp;
Index : Interp_Index;
begin
Get_First_Interp (Name, Index, It);
while Present (It.Nam) loop
Proc := It.Nam;
if Ekind (Proc) = E_Procedure
and then No (First_Formal (Proc))
then
if not Found then
Found := True;
Set_Entity (Name, Proc);
Set_Is_Overloaded (Name, False);
else
Error_Pragma_Arg
("ambiguous handler name for pragma% ", Arg);
end if;
end if;
Get_Next_Interp (Index, It);
end loop;
if not Found then
Error_Pragma_Arg
("argument of pragma% must be parameterless procedure",
Arg);
else
Proc := Entity (Name);
end if;
end;
end if;
return Proc;
end Find_Unique_Parameterless_Procedure;
-------------------------
-- Gather_Associations --
-------------------------
procedure Gather_Associations
(Names : Name_List;
Args : out Args_List)
is
Arg : Node_Id;
begin
-- Initialize all parameters to Empty
for J in Args'Range loop
Args (J) := Empty;
end loop;
-- That's all we have to do if there are no argument associations
if No (Pragma_Argument_Associations (N)) then
return;
end if;
-- Otherwise first deal with any positional parameters present
Arg := First (Pragma_Argument_Associations (N));
for Index in Args'Range loop
exit when No (Arg) or else Chars (Arg) /= No_Name;
Args (Index) := Expression (Arg);
Next (Arg);
end loop;
-- Positional parameters all processed, if any left, then we
-- have too many positional parameters.
if Present (Arg) and then Chars (Arg) = No_Name then
Error_Pragma_Arg
("too many positional associations for pragma%", Arg);
end if;
-- Process named parameters if any are present
while Present (Arg) loop
if Chars (Arg) = No_Name then
Error_Pragma_Arg
("positional association cannot follow named association",
Arg);
else
for Index in Names'Range loop
if Names (Index) = Chars (Arg) then
if Present (Args (Index)) then
Error_Pragma_Arg
("duplicate argument association for pragma%", Arg);
else
Args (Index) := Expression (Arg);
exit;
end if;
end if;
if Index = Names'Last then
Error_Msg_Name_1 := Chars (N);
Error_Msg_N ("pragma% does not allow & argument", Arg);
-- Check for possible misspelling
for Index1 in Names'Range loop
if Is_Bad_Spelling_Of
(Get_Name_String (Chars (Arg)),
Get_Name_String (Names (Index1)))
then
Error_Msg_Name_1 := Names (Index1);
Error_Msg_N ("\possible misspelling of%", Arg);
exit;
end if;
end loop;
raise Pragma_Exit;
end if;
end loop;
end if;
Next (Arg);
end loop;
end Gather_Associations;
--------------------
-- Get_Pragma_Arg --
--------------------
function Get_Pragma_Arg (Arg : Node_Id) return Node_Id is
begin
if Nkind (Arg) = N_Pragma_Argument_Association then
return Expression (Arg);
else
return Arg;
end if;
end Get_Pragma_Arg;
-----------------
-- GNAT_Pragma --
-----------------
procedure GNAT_Pragma is
begin
Check_Restriction (No_Implementation_Pragmas, N);
end GNAT_Pragma;
--------------------------
-- Is_Before_First_Decl --
--------------------------
function Is_Before_First_Decl
(Pragma_Node : Node_Id;
Decls : List_Id) return Boolean
is
Item : Node_Id := First (Decls);
begin
-- Only other pragmas can come before this pragma
loop
if No (Item) or else Nkind (Item) /= N_Pragma then
return False;
elsif Item = Pragma_Node then
return True;
end if;
Next (Item);
end loop;
end Is_Before_First_Decl;
-----------------------------
-- Is_Configuration_Pragma --
-----------------------------
-- A configuration pragma must appear in the context clause of
-- a compilation unit, at the start of the list (i.e. only other
-- pragmas may precede it).
function Is_Configuration_Pragma return Boolean is
Lis : constant List_Id := List_Containing (N);
Par : constant Node_Id := Parent (N);
Prg : Node_Id;
begin
-- If no parent, then we are in the configuration pragma file,
-- so the placement is definitely appropriate.
if No (Par) then
return True;
-- Otherwise we must be in the context clause of a compilation unit
-- and the only thing allowed before us in the context list is more
-- configuration pragmas.
elsif Nkind (Par) = N_Compilation_Unit
and then Context_Items (Par) = Lis
then
Prg := First (Lis);
loop
if Prg = N then
return True;
elsif Nkind (Prg) /= N_Pragma then
return False;
end if;
Next (Prg);
end loop;
else
return False;
end if;
end Is_Configuration_Pragma;
----------------------
-- Pragma_Misplaced --
----------------------
procedure Pragma_Misplaced is
begin
Error_Pragma ("incorrect placement of pragma%");
end Pragma_Misplaced;
------------------------------------
-- Process Atomic_Shared_Volatile --
------------------------------------
procedure Process_Atomic_Shared_Volatile is
E_Id : Node_Id;
E : Entity_Id;
D : Node_Id;
K : Node_Kind;
Utyp : Entity_Id;
procedure Set_Atomic (E : Entity_Id);
-- Set given type as atomic, and if no explicit alignment was
-- given, set alignment to unknown, since back end knows what
-- the alignment requirements are for atomic arrays. Note that
-- this step is necessary for derived types.
----------------
-- Set_Atomic --
----------------
procedure Set_Atomic (E : Entity_Id) is
begin
Set_Is_Atomic (E);
if not Has_Alignment_Clause (E) then
Set_Alignment (E, Uint_0);
end if;
end Set_Atomic;
-- Start of processing for Process_Atomic_Shared_Volatile
begin
Check_Ada_83_Warning;
Check_No_Identifiers;
Check_Arg_Count (1);
Check_Arg_Is_Local_Name (Arg1);
E_Id := Expression (Arg1);
if Etype (E_Id) = Any_Type then
return;
end if;
E := Entity (E_Id);
D := Declaration_Node (E);
K := Nkind (D);
if Is_Type (E) then
if Rep_Item_Too_Early (E, N)
or else
Rep_Item_Too_Late (E, N)
then
return;
else
Check_First_Subtype (Arg1);
end if;
if Prag_Id /= Pragma_Volatile then
Set_Atomic (E);
Set_Atomic (Underlying_Type (E));
Set_Atomic (Base_Type (E));
end if;
-- Attribute belongs on the base type. If the
-- view of the type is currently private, it also
-- belongs on the underlying type.
Set_Is_Volatile (Base_Type (E));
Set_Is_Volatile (Underlying_Type (E));
Set_Treat_As_Volatile (E);
Set_Treat_As_Volatile (Underlying_Type (E));
elsif K = N_Object_Declaration
or else (K = N_Component_Declaration
and then Original_Record_Component (E) = E)
then
if Rep_Item_Too_Late (E, N) then
return;
end if;
if Prag_Id /= Pragma_Volatile then
Set_Is_Atomic (E);
-- If the object declaration has an explicit
-- initialization, a temporary may have to be
-- created to hold the expression, to insure
-- that access to the object remain atomic.
if Nkind (Parent (E)) = N_Object_Declaration
and then Present (Expression (Parent (E)))
then
Set_Has_Delayed_Freeze (E);
end if;
-- An interesting improvement here. If an object of type X
-- is declared atomic, and the type X is not atomic, that's
-- a pity, since it may not have appropraite alignment etc.
-- We can rescue this in the special case where the object
-- and type are in the same unit by just setting the type
-- as atomic, so that the back end will process it as atomic.
Utyp := Underlying_Type (Etype (E));
if Present (Utyp)
and then Sloc (E) > No_Location
and then Sloc (Utyp) > No_Location
and then
Get_Source_File_Index (Sloc (E)) =
Get_Source_File_Index (Sloc (Underlying_Type (Etype (E))))
then
Set_Is_Atomic (Underlying_Type (Etype (E)));
end if;
end if;
Set_Is_Volatile (E);
Set_Treat_As_Volatile (E);
else
Error_Pragma_Arg
("inappropriate entity for pragma%", Arg1);
end if;
end Process_Atomic_Shared_Volatile;
------------------------
-- Process_Convention --
------------------------
procedure Process_Convention
(C : out Convention_Id;
E : out Entity_Id)
is
Id : Node_Id;
E1 : Entity_Id;
Cname : Name_Id;
Comp_Unit : Unit_Number_Type;
procedure Set_Convention_From_Pragma (E : Entity_Id);
-- Set convention in entity E, and also flag that the entity has a
-- convention pragma. If entity is for a private or incomplete type,
-- also set convention and flag on underlying type. This procedure
-- also deals with the special case of C_Pass_By_Copy convention.
--------------------------------
-- Set_Convention_From_Pragma --
--------------------------------
procedure Set_Convention_From_Pragma (E : Entity_Id) is
begin
-- Check invalid attempt to change convention for an overridden
-- dispatching operation. This is Ada 2005 AI 430. Technically
-- this is an amendment and should only be done in Ada 2005 mode.
-- However, this is clearly a mistake, since the problem that is
-- addressed by this AI is that there is a clear gap in the RM!
if Is_Dispatching_Operation (E)
and then Present (Overridden_Operation (E))
and then C /= Convention (Overridden_Operation (E))
then
Error_Pragma_Arg
("cannot change convention for " &
"overridden dispatching operation",
Arg1);
end if;
-- Set the convention
Set_Convention (E, C);
Set_Has_Convention_Pragma (E);
if Is_Incomplete_Or_Private_Type (E) then
Set_Convention (Underlying_Type (E), C);
Set_Has_Convention_Pragma (Underlying_Type (E), True);
end if;
-- A class-wide type should inherit the convention of
-- the specific root type (although this isn't specified
-- clearly by the RM).
if Is_Type (E) and then Present (Class_Wide_Type (E)) then
Set_Convention (Class_Wide_Type (E), C);
end if;
-- If the entity is a record type, then check for special case
-- of C_Pass_By_Copy, which is treated the same as C except that
-- the special record flag is set. This convention is also only
-- permitted on record types (see AI95-00131).
if Cname = Name_C_Pass_By_Copy then
if Is_Record_Type (E) then
Set_C_Pass_By_Copy (Base_Type (E));
elsif Is_Incomplete_Or_Private_Type (E)
and then Is_Record_Type (Underlying_Type (E))
then
Set_C_Pass_By_Copy (Base_Type (Underlying_Type (E)));
else
Error_Pragma_Arg
("C_Pass_By_Copy convention allowed only for record type",
Arg2);
end if;
end if;
-- If the entity is a derived boolean type, check for the
-- special case of convention C, C++, or Fortran, where we
-- consider any nonzero value to represent true.
if Is_Discrete_Type (E)
and then Root_Type (Etype (E)) = Standard_Boolean
and then
(C = Convention_C
or else
C = Convention_CPP
or else
C = Convention_Fortran)
then
Set_Nonzero_Is_True (Base_Type (E));
end if;
end Set_Convention_From_Pragma;
-- Start of processing for Process_Convention
begin
Check_At_Least_N_Arguments (2);
Check_Optional_Identifier (Arg1, Name_Convention);
Check_Arg_Is_Identifier (Arg1);
Cname := Chars (Expression (Arg1));
-- C_Pass_By_Copy is treated as a synonym for convention C
-- (this is tested again below to set the critical flag)
if Cname = Name_C_Pass_By_Copy then
C := Convention_C;
-- Otherwise we must have something in the standard convention list
elsif Is_Convention_Name (Cname) then
C := Get_Convention_Id (Chars (Expression (Arg1)));
-- In DEC VMS, it seems that there is an undocumented feature
-- that any unrecognized convention is treated as the default,
-- which for us is convention C. It does not seem so terrible
-- to do this unconditionally, silently in the VMS case, and
-- with a warning in the non-VMS case.
else
if Warn_On_Export_Import and not OpenVMS_On_Target then
Error_Msg_N
("?unrecognized convention name, C assumed",
Expression (Arg1));
end if;
C := Convention_C;
end if;
Check_Optional_Identifier (Arg2, Name_Entity);
Check_Arg_Is_Local_Name (Arg2);
Id := Expression (Arg2);
Analyze (Id);
if not Is_Entity_Name (Id) then
Error_Pragma_Arg ("entity name required", Arg2);
end if;
E := Entity (Id);
-- Go to renamed subprogram if present, since convention applies
-- to the actual renamed entity, not to the renaming entity.
-- If subprogram is inherited, go to parent subprogram.
if Is_Subprogram (E)
and then Present (Alias (E))
then
if Nkind (Parent (Declaration_Node (E)))
= N_Subprogram_Renaming_Declaration
then
E := Alias (E);
elsif Nkind (Parent (E)) = N_Full_Type_Declaration
and then Scope (E) = Scope (Alias (E))
then
E := Alias (E);
end if;
end if;
-- Check that we are not applying this to a specless body
if Is_Subprogram (E)
and then Nkind (Parent (Declaration_Node (E))) = N_Subprogram_Body
then
Error_Pragma
("pragma% requires separate spec and must come before body");
end if;
-- Check that we are not applying this to a named constant
if Ekind (E) = E_Named_Integer
or else
Ekind (E) = E_Named_Real
then
Error_Msg_Name_1 := Chars (N);
Error_Msg_N
("cannot apply pragma% to named constant!",
Get_Pragma_Arg (Arg2));
Error_Pragma_Arg
("\supply appropriate type for&!", Arg2);
end if;
if Etype (E) = Any_Type
or else Rep_Item_Too_Early (E, N)
then
raise Pragma_Exit;
else
E := Underlying_Type (E);
end if;
if Rep_Item_Too_Late (E, N) then
raise Pragma_Exit;
end if;
if Has_Convention_Pragma (E) then
Error_Pragma_Arg
("at most one Convention/Export/Import pragma is allowed", Arg2);
elsif Convention (E) = Convention_Protected
or else Ekind (Scope (E)) = E_Protected_Type
then
Error_Pragma_Arg
("a protected operation cannot be given a different convention",
Arg2);
end if;
-- For Intrinsic, a subprogram is required
if C = Convention_Intrinsic
and then not Is_Subprogram (E)
and then not Is_Generic_Subprogram (E)
then
Error_Pragma_Arg
("second argument of pragma% must be a subprogram", Arg2);
end if;
-- For Stdcall, a subprogram, variable or subprogram type is required
if C = Convention_Stdcall
and then not Is_Subprogram (E)
and then not Is_Generic_Subprogram (E)
and then Ekind (E) /= E_Variable
and then not
(Is_Access_Type (E)
and then Ekind (Designated_Type (E)) = E_Subprogram_Type)
then
Error_Pragma_Arg
("second argument of pragma% must be subprogram (type)",
Arg2);
end if;
if not Is_Subprogram (E)
and then not Is_Generic_Subprogram (E)
then
Set_Convention_From_Pragma (E);
if Is_Type (E) then
Check_First_Subtype (Arg2);
Set_Convention_From_Pragma (Base_Type (E));
-- For subprograms, we must set the convention on the
-- internally generated directly designated type as well.
if Ekind (E) = E_Access_Subprogram_Type then
Set_Convention_From_Pragma (Directly_Designated_Type (E));
end if;
end if;
-- For the subprogram case, set proper convention for all homonyms
-- in same scope and the same declarative part, i.e. the same
-- compilation unit.
else
Comp_Unit := Get_Source_Unit (E);
Set_Convention_From_Pragma (E);
-- Treat a pragma Import as an implicit body, for GPS use
if Prag_Id = Pragma_Import then
Generate_Reference (E, Id, 'b');
end if;
E1 := E;
loop
E1 := Homonym (E1);
exit when No (E1) or else Scope (E1) /= Current_Scope;
-- Note: below we are missing a check for Rep_Item_Too_Late.
-- That is deliberate, we cannot chain the rep item on more
-- than one Rep_Item chain, to be fixed later ???
if Comes_From_Source (E1)
and then Comp_Unit = Get_Source_Unit (E1)
and then Nkind (Original_Node (Parent (E1))) /=
N_Full_Type_Declaration
then
Set_Convention_From_Pragma (E1);
if Prag_Id = Pragma_Import then
Generate_Reference (E, Id, 'b');
end if;
end if;
end loop;
end if;
end Process_Convention;
-----------------------------------------------------
-- Process_Extended_Import_Export_Exception_Pragma --
-----------------------------------------------------
procedure Process_Extended_Import_Export_Exception_Pragma
(Arg_Internal : Node_Id;
Arg_External : Node_Id;
Arg_Form : Node_Id;
Arg_Code : Node_Id)
is
Def_Id : Entity_Id;
Code_Val : Uint;
begin
GNAT_Pragma;
if not OpenVMS_On_Target then
Error_Pragma
("?pragma% ignored (applies only to Open'V'M'S)");
end if;
Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
Def_Id := Entity (Arg_Internal);
if Ekind (Def_Id) /= E_Exception then
Error_Pragma_Arg
("pragma% must refer to declared exception", Arg_Internal);
end if;
Set_Extended_Import_Export_External_Name (Def_Id, Arg_External);
if Present (Arg_Form) then
Check_Arg_Is_One_Of (Arg_Form, Name_Ada, Name_VMS);
end if;
if Present (Arg_Form)
and then Chars (Arg_Form) = Name_Ada
then
null;
else
Set_Is_VMS_Exception (Def_Id);
Set_Exception_Code (Def_Id, No_Uint);
end if;
if Present (Arg_Code) then
if not Is_VMS_Exception (Def_Id) then
Error_Pragma_Arg
("Code option for pragma% not allowed for Ada case",
Arg_Code);
end if;
Check_Arg_Is_Static_Expression (Arg_Code, Any_Integer);
Code_Val := Expr_Value (Arg_Code);
if not UI_Is_In_Int_Range (Code_Val) then
Error_Pragma_Arg
("Code option for pragma% must be in 32-bit range",
Arg_Code);
else
Set_Exception_Code (Def_Id, Code_Val);
end if;
end if;
end Process_Extended_Import_Export_Exception_Pragma;
-------------------------------------------------
-- Process_Extended_Import_Export_Internal_Arg --
-------------------------------------------------
procedure Process_Extended_Import_Export_Internal_Arg
(Arg_Internal : Node_Id := Empty)
is
begin
GNAT_Pragma;
if No (Arg_Internal) then
Error_Pragma ("Internal parameter required for pragma%");
end if;
if Nkind (Arg_Internal) = N_Identifier then
null;
elsif Nkind (Arg_Internal) = N_Operator_Symbol
and then (Prag_Id = Pragma_Import_Function
or else
Prag_Id = Pragma_Export_Function)
then
null;
else
Error_Pragma_Arg
("wrong form for Internal parameter for pragma%", Arg_Internal);
end if;
Check_Arg_Is_Local_Name (Arg_Internal);
end Process_Extended_Import_Export_Internal_Arg;
--------------------------------------------------
-- Process_Extended_Import_Export_Object_Pragma --
--------------------------------------------------
procedure Process_Extended_Import_Export_Object_Pragma
(Arg_Internal : Node_Id;
Arg_External : Node_Id;
Arg_Size : Node_Id)
is
Def_Id : Entity_Id;
begin
Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
Def_Id := Entity (Arg_Internal);
if Ekind (Def_Id) /= E_Constant
and then Ekind (Def_Id) /= E_Variable
then
Error_Pragma_Arg
("pragma% must designate an object", Arg_Internal);
end if;
if Has_Rep_Pragma (Def_Id, Name_Common_Object)
or else
Has_Rep_Pragma (Def_Id, Name_Psect_Object)
then
Error_Pragma_Arg
("previous Common/Psect_Object applies, pragma % not permitted",
Arg_Internal);
end if;
if Rep_Item_Too_Late (Def_Id, N) then
raise Pragma_Exit;
end if;
Set_Extended_Import_Export_External_Name (Def_Id, Arg_External);
if Present (Arg_Size) then
Check_Arg_Is_External_Name (Arg_Size);
end if;
-- Export_Object case
if Prag_Id = Pragma_Export_Object then
if not Is_Library_Level_Entity (Def_Id) then
Error_Pragma_Arg
("argument for pragma% must be library level entity",
Arg_Internal);
end if;
if Ekind (Current_Scope) = E_Generic_Package then
Error_Pragma ("pragma& cannot appear in a generic unit");
end if;
if not Size_Known_At_Compile_Time (Etype (Def_Id)) then
Error_Pragma_Arg
("exported object must have compile time known size",
Arg_Internal);
end if;
if Warn_On_Export_Import and then Is_Exported (Def_Id) then
Error_Msg_N
("?duplicate Export_Object pragma", N);
else
Set_Exported (Def_Id, Arg_Internal);
end if;
-- Import_Object case
else
if Is_Concurrent_Type (Etype (Def_Id)) then
Error_Pragma_Arg
("cannot use pragma% for task/protected object",
Arg_Internal);
end if;
if Ekind (Def_Id) = E_Constant then
Error_Pragma_Arg
("cannot import a constant", Arg_Internal);
end if;
if Warn_On_Export_Import
and then Has_Discriminants (Etype (Def_Id))
then
Error_Msg_N
("imported value must be initialized?", Arg_Internal);
end if;
if Warn_On_Export_Import
and then Is_Access_Type (Etype (Def_Id))
then
Error_Pragma_Arg
("cannot import object of an access type?", Arg_Internal);
end if;
if Warn_On_Export_Import
and then Is_Imported (Def_Id)
then
Error_Msg_N
("?duplicate Import_Object pragma", N);
-- Check for explicit initialization present. Note that an
-- initialization that generated by the code generator, e.g.
-- for an access type, does not count here.
elsif Present (Expression (Parent (Def_Id)))
and then
Comes_From_Source
(Original_Node (Expression (Parent (Def_Id))))
then
Error_Msg_Sloc := Sloc (Def_Id);
Error_Pragma_Arg
("no initialization allowed for declaration of& #",
"\imported entities cannot be initialized ('R'M' 'B.1(24))",
Arg1);
else
Set_Imported (Def_Id);
Note_Possible_Modification (Arg_Internal);
end if;
end if;
end Process_Extended_Import_Export_Object_Pragma;
------------------------------------------------------
-- Process_Extended_Import_Export_Subprogram_Pragma --
------------------------------------------------------
procedure Process_Extended_Import_Export_Subprogram_Pragma
(Arg_Internal : Node_Id;
Arg_External : Node_Id;
Arg_Parameter_Types : Node_Id;
Arg_Result_Type : Node_Id := Empty;
Arg_Mechanism : Node_Id;
Arg_Result_Mechanism : Node_Id := Empty;
Arg_First_Optional_Parameter : Node_Id := Empty)
is
Ent : Entity_Id;
Def_Id : Entity_Id;
Hom_Id : Entity_Id;
Formal : Entity_Id;
Ambiguous : Boolean;
Match : Boolean;
Dval : Node_Id;
function Same_Base_Type
(Ptype : Node_Id;
Formal : Entity_Id) return Boolean;
-- Determines if Ptype references the type of Formal. Note that
-- only the base types need to match according to the spec. Ptype
-- here is the argument from the pragma, which is either a type
-- name, or an access attribute.
--------------------
-- Same_Base_Type --
--------------------
function Same_Base_Type
(Ptype : Node_Id;
Formal : Entity_Id) return Boolean
is
Ftyp : constant Entity_Id := Base_Type (Etype (Formal));
Pref : Node_Id;
begin
-- Case where pragma argument is typ'Access
if Nkind (Ptype) = N_Attribute_Reference
and then Attribute_Name (Ptype) = Name_Access
then
Pref := Prefix (Ptype);
Find_Type (Pref);
if not Is_Entity_Name (Pref)
or else Entity (Pref) = Any_Type
then
raise Pragma_Exit;
end if;
-- We have a match if the corresponding argument is of an
-- anonymous access type, and its designicated type matches
-- the type of the prefix of the access attribute
return Ekind (Ftyp) = E_Anonymous_Access_Type
and then Base_Type (Entity (Pref)) =
Base_Type (Etype (Designated_Type (Ftyp)));
-- Case where pragma argument is a type name
else
Find_Type (Ptype);
if not Is_Entity_Name (Ptype)
or else Entity (Ptype) = Any_Type
then
raise Pragma_Exit;
end if;
-- We have a match if the corresponding argument is of
-- the type given in the pragma (comparing base types)
return Base_Type (Entity (Ptype)) = Ftyp;
end if;
end Same_Base_Type;
-- Start of processing for
-- Process_Extended_Import_Export_Subprogram_Pragma
begin
Process_Extended_Import_Export_Internal_Arg (Arg_Internal);
Ent := Empty;
Ambiguous := False;
-- Loop through homonyms (overloadings) of the entity
Hom_Id := Entity (Arg_Internal);
while Present (Hom_Id) loop
Def_Id := Get_Base_Subprogram (Hom_Id);
-- We need a subprogram in the current scope
if not Is_Subprogram (Def_Id)
or else Scope (Def_Id) /= Current_Scope
then
null;
else
Match := True;
-- Pragma cannot apply to subprogram body
if Is_Subprogram (Def_Id)
and then
Nkind (Parent
(Declaration_Node (Def_Id))) = N_Subprogram_Body
then
Error_Pragma
("pragma% requires separate spec"
& " and must come before body");
end if;
-- Test result type if given, note that the result type
-- parameter can only be present for the function cases.
if Present (Arg_Result_Type)
and then not Same_Base_Type (Arg_Result_Type, Def_Id)
then
Match := False;
elsif Etype (Def_Id) /= Standard_Void_Type
and then
(Chars (N) = Name_Export_Procedure
or else Chars (N) = Name_Import_Procedure)
then
Match := False;
-- Test parameter types if given. Note that this parameter
-- has not been analyzed (and must not be, since it is
-- semantic nonsense), so we get it as the parser left it.
elsif Present (Arg_Parameter_Types) then
Check_Matching_Types : declare
Formal : Entity_Id;
Ptype : Node_Id;
begin
Formal := First_Formal (Def_Id);
if Nkind (Arg_Parameter_Types) = N_Null then
if Present (Formal) then
Match := False;
end if;
-- A list of one type, e.g. (List) is parsed as
-- a parenthesized expression.
elsif Nkind (Arg_Parameter_Types) /= N_Aggregate
and then Paren_Count (Arg_Parameter_Types) = 1
then
if No (Formal)
or else Present (Next_Formal (Formal))
then
Match := False;
else
Match :=
Same_Base_Type (Arg_Parameter_Types, Formal);
end if;
-- A list of more than one type is parsed as a aggregate
elsif Nkind (Arg_Parameter_Types) = N_Aggregate
and then Paren_Count (Arg_Parameter_Types) = 0
then
Ptype := First (Expressions (Arg_Parameter_Types));
while Present (Ptype) or else Present (Formal) loop
if No (Ptype)
or else No (Formal)
or else not Same_Base_Type (Ptype, Formal)
then
Match := False;
exit;
else
Next_Formal (Formal);
Next (Ptype);
end if;
end loop;
-- Anything else is of the wrong form
else
Error_Pragma_Arg
("wrong form for Parameter_Types parameter",
Arg_Parameter_Types);
end if;
end Check_Matching_Types;
end if;
-- Match is now False if the entry we found did not match
-- either a supplied Parameter_Types or Result_Types argument
if Match then
if No (Ent) then
Ent := Def_Id;
-- Ambiguous case, the flag Ambiguous shows if we already
-- detected this and output the initial messages.
else
if not Ambiguous then
Ambiguous := True;
Error_Msg_Name_1 := Chars (N);
Error_Msg_N
("pragma% does not uniquely identify subprogram!",
N);
Error_Msg_Sloc := Sloc (Ent);
Error_Msg_N ("matching subprogram #!", N);
Ent := Empty;
end if;
Error_Msg_Sloc := Sloc (Def_Id);
Error_Msg_N ("matching subprogram #!", N);
end if;
end if;
end if;
Hom_Id := Homonym (Hom_Id);
end loop;
-- See if we found an entry
if No (Ent) then
if not Ambiguous then
if Is_Generic_Subprogram (Entity (Arg_Internal)) then
Error_Pragma
("pragma% cannot be given for generic subprogram");
else
Error_Pragma
("pragma% does not identify local subprogram");
end if;
end if;
return;
end if;
-- Import pragmas must be be for imported entities
if Prag_Id = Pragma_Import_Function
or else
Prag_Id = Pragma_Import_Procedure
or else
Prag_Id = Pragma_Import_Valued_Procedure
then
if not Is_Imported (Ent) then
Error_Pragma
("pragma Import or Interface must precede pragma%");
end if;
-- Here we have the Export case which can set the entity as exported
-- But does not do so if the specified external name is null,
-- since that is taken as a signal in DEC Ada 83 (with which
-- we want to be compatible) to request no external name.
elsif Nkind (Arg_External) = N_String_Literal
and then String_Length (Strval (Arg_External)) = 0
then
null;
-- In all other cases, set entit as exported
else
Set_Exported (Ent, Arg_Internal);
end if;
-- Special processing for Valued_Procedure cases
if Prag_Id = Pragma_Import_Valued_Procedure
or else
Prag_Id = Pragma_Export_Valued_Procedure
then
Formal := First_Formal (Ent);
if No (Formal) then
Error_Pragma
("at least one parameter required for pragma%");
elsif Ekind (Formal) /= E_Out_Parameter then
Error_Pragma
("first parameter must have mode out for pragma%");
else
Set_Is_Valued_Procedure (Ent);
end if;
end if;
Set_Extended_Import_Export_External_Name (Ent, Arg_External);
-- Process Result_Mechanism argument if present. We have already
-- checked that this is only allowed for the function case.
if Present (Arg_Result_Mechanism) then
Set_Mechanism_Value (Ent, Arg_Result_Mechanism);
end if;
-- Process Mechanism parameter if present. Note that this parameter
-- is not analyzed, and must not be analyzed since it is semantic
-- nonsense, so we get it in exactly as the parser left it.
if Present (Arg_Mechanism) then
declare
Formal : Entity_Id;
Massoc : Node_Id;
Mname : Node_Id;
Choice : Node_Id;
begin
-- A single mechanism association without a formal parameter
-- name is parsed as a parenthesized expression. All other
-- cases are parsed as aggregates, so we rewrite the single
-- parameter case as an aggregate for consistency.
if Nkind (Arg_Mechanism) /= N_Aggregate
and then Paren_Count (Arg_Mechanism) = 1
then
Rewrite (Arg_Mechanism,
Make_Aggregate (Sloc (Arg_Mechanism),
Expressions => New_List (
Relocate_Node (Arg_Mechanism))));
end if;
-- Case of only mechanism name given, applies to all formals
if Nkind (Arg_Mechanism) /= N_Aggregate then
Formal := First_Formal (Ent);
while Present (Formal) loop
Set_Mechanism_Value (Formal, Arg_Mechanism);
Next_Formal (Formal);
end loop;
-- Case of list of mechanism associations given
else
if Null_Record_Present (Arg_Mechanism) then
Error_Pragma_Arg
("inappropriate form for Mechanism parameter",
Arg_Mechanism);
end if;
-- Deal with positional ones first
Formal := First_Formal (Ent);
if Present (Expressions (Arg_Mechanism)) then
Mname := First (Expressions (Arg_Mechanism));
while Present (Mname) loop
if No (Formal) then
Error_Pragma_Arg
("too many mechanism associations", Mname);
end if;
Set_Mechanism_Value (Formal, Mname);
Next_Formal (Formal);
Next (Mname);
end loop;
end if;
-- Deal with named entries
if Present (Component_Associations (Arg_Mechanism)) then
Massoc := First (Component_Associations (Arg_Mechanism));
while Present (Massoc) loop
Choice := First (Choices (Massoc));
if Nkind (Choice) /= N_Identifier
or else Present (Next (Choice))
then
Error_Pragma_Arg
("incorrect form for mechanism association",
Massoc);
end if;
Formal := First_Formal (Ent);
loop
if No (Formal) then
Error_Pragma_Arg
("parameter name & not present", Choice);
end if;
if Chars (Choice) = Chars (Formal) then
Set_Mechanism_Value
(Formal, Expression (Massoc));
exit;
end if;
Next_Formal (Formal);
end loop;
Next (Massoc);
end loop;
end if;
end if;
end;
end if;
-- Process First_Optional_Parameter argument if present. We have
-- already checked that this is only allowed for the Import case.
if Present (Arg_First_Optional_Parameter) then
if Nkind (Arg_First_Optional_Parameter) /= N_Identifier then
Error_Pragma_Arg
("first optional parameter must be formal parameter name",
Arg_First_Optional_Parameter);
end if;
Formal := First_Formal (Ent);
loop
if No (Formal) then
Error_Pragma_Arg
("specified formal parameter& not found",
Arg_First_Optional_Parameter);
end if;
exit when Chars (Formal) =
Chars (Arg_First_Optional_Parameter);
Next_Formal (Formal);
end loop;
Set_First_Optional_Parameter (Ent, Formal);
-- Check specified and all remaining formals have right form
while Present (Formal) loop
if Ekind (Formal) /= E_In_Parameter then
Error_Msg_NE
("optional formal& is not of mode in!",
Arg_First_Optional_Parameter, Formal);
else
Dval := Default_Value (Formal);
if No (Dval) then
Error_Msg_NE
("optional formal& does not have default value!",
Arg_First_Optional_Parameter, Formal);
elsif Compile_Time_Known_Value_Or_Aggr (Dval) then
null;
else
Error_Msg_FE
("default value for optional formal& is non-static!",
Arg_First_Optional_Parameter, Formal);
end if;
end if;
Set_Is_Optional_Parameter (Formal);
Next_Formal (Formal);
end loop;
end if;
end Process_Extended_Import_Export_Subprogram_Pragma;
--------------------------
-- Process_Generic_List --
--------------------------
procedure Process_Generic_List is
Arg : Node_Id;
Exp : Node_Id;
begin
GNAT_Pragma;
Check_No_Identifiers;
Check_At_Least_N_Arguments (1);
Arg := Arg1;
while Present (Arg) loop
Exp := Expression (Arg);
Analyze (Exp);
if not Is_Entity_Name (Exp)
or else
(not Is_Generic_Instance (Entity (Exp))
and then
not Is_Generic_Unit (Entity (Exp)))
then
Error_Pragma_Arg
("pragma% argument must be name of generic unit/instance",
Arg);
end if;
Next (Arg);
end loop;
end Process_Generic_List;
---------------------------------
-- Process_Import_Or_Interface --
---------------------------------
procedure Process_Import_Or_Interface is
C : Convention_Id;
Def_Id : Entity_Id;
Hom_Id : Entity_Id;
begin
Process_Convention (C, Def_Id);
Kill_Size_Check_Code (Def_Id);
Note_Possible_Modification (Expression (Arg2));
if Ekind (Def_Id) = E_Variable
or else
Ekind (Def_Id) = E_Constant
then
-- User initialization is not allowed for imported object, but
-- the object declaration may contain a default initialization,
-- that will be discarded. Note that an explicit initialization
-- only counts if it comes from source, otherwise it is simply
-- the code generator making an implicit initialization explicit.
if Present (Expression (Parent (Def_Id)))
and then Comes_From_Source (Expression (Parent (Def_Id)))
then
Error_Msg_Sloc := Sloc (Def_Id);
Error_Pragma_Arg
("no initialization allowed for declaration of& #",
"\imported entities cannot be initialized ('R'M' 'B.1(24))",
Arg2);
else
Set_Imported (Def_Id);
Process_Interface_Name (Def_Id, Arg3, Arg4);
-- Note that we do not set Is_Public here. That's because we
-- only want to set if if there is no address clause, and we
-- don't know that yet, so we delay that processing till
-- freeze time.
-- pragma Import completes deferred constants
if Ekind (Def_Id) = E_Constant then
Set_Has_Completion (Def_Id);
end if;
-- It is not possible to import a constant of an unconstrained
-- array type (e.g. string) because there is no simple way to
-- write a meaningful subtype for it.
if Is_Array_Type (Etype (Def_Id))
and then not Is_Constrained (Etype (Def_Id))
then
Error_Msg_NE
("imported constant& must have a constrained subtype",
N, Def_Id);
end if;
end if;
elsif Is_Subprogram (Def_Id)
or else Is_Generic_Subprogram (Def_Id)
then
-- If the name is overloaded, pragma applies to all of the
-- denoted entities in the same declarative part.
Hom_Id := Def_Id;
while Present (Hom_Id) loop
Def_Id := Get_Base_Subprogram (Hom_Id);
-- Ignore inherited subprograms because the pragma will
-- apply to the parent operation, which is the one called.
if Is_Overloadable (Def_Id)
and then Present (Alias (Def_Id))
then
null;
-- If it is not a subprogram, it must be in an outer
-- scope and pragma does not apply.
elsif not Is_Subprogram (Def_Id)
and then not Is_Generic_Subprogram (Def_Id)
then
null;
-- Verify that the homonym is in the same declarative
-- part (not just the same scope).
elsif Parent (Unit_Declaration_Node (Def_Id)) /= Parent (N)
and then Nkind (Parent (N)) /= N_Compilation_Unit_Aux
then
exit;
else
Set_Imported (Def_Id);
-- Special processing for Convention_Intrinsic
if C = Convention_Intrinsic then
-- Link_Name argument not allowed for intrinsic
if Present (Arg3)
and then Chars (Arg3) = Name_Link_Name
then
Arg4 := Arg3;
end if;
if Present (Arg4) then
Error_Pragma_Arg
("Link_Name argument not allowed for " &
"Import Intrinsic",
Arg4);
end if;
Set_Is_Intrinsic_Subprogram (Def_Id);
-- If no external name is present, then check that
-- this is a valid intrinsic subprogram. If an external
-- name is present, then this is handled by the back end.
if No (Arg3) then
Check_Intrinsic_Subprogram (Def_Id, Expression (Arg2));
end if;
end if;
-- All interfaced procedures need an external symbol
-- created for them since they are always referenced
-- from another object file.
Set_Is_Public (Def_Id);
-- Verify that the subprogram does not have a completion
-- through a renaming declaration. For other completions
-- the pragma appears as a too late representation.
declare
Decl : constant Node_Id := Unit_Declaration_Node (Def_Id);
begin
if Present (Decl)
and then Nkind (Decl) = N_Subprogram_Declaration
and then Present (Corresponding_Body (Decl))
and then
Nkind
(Unit_Declaration_Node
(Corresponding_Body (Decl))) =
N_Subprogram_Renaming_Declaration
then
Error_Msg_Sloc := Sloc (Def_Id);
Error_Msg_NE ("cannot import&#," &
" already completed by a renaming",
N, Def_Id);
end if;
end;
Set_Has_Completion (Def_Id);
Process_Interface_Name (Def_Id, Arg3, Arg4);
end if;
if Is_Compilation_Unit (Hom_Id) then
-- Its possible homonyms are not affected by the pragma.
-- Such homonyms might be present in the context of other
-- units being compiled.
exit;
else
Hom_Id := Homonym (Hom_Id);
end if;
end loop;
-- When the convention is Java, we also allow Import to be given
-- for packages, exceptions, and record components.
elsif C = Convention_Java
and then
(Ekind (Def_Id) = E_Package
or else Ekind (Def_Id) = E_Exception
or else Nkind (Parent (Def_Id)) = N_Component_Declaration)
then
Set_Imported (Def_Id);
Set_Is_Public (Def_Id);
Process_Interface_Name (Def_Id, Arg3, Arg4);
else
Error_Pragma_Arg
("second argument of pragma% must be object or subprogram",
Arg2);
end if;
-- If this pragma applies to a compilation unit, then the unit,
-- which is a subprogram, does not require (or allow) a body.
-- We also do not need to elaborate imported procedures.
if Nkind (Parent (N)) = N_Compilation_Unit_Aux then
declare
Cunit : constant Node_Id := Parent (Parent (N));
begin
Set_Body_Required (Cunit, False);
end;
end if;
end Process_Import_Or_Interface;
--------------------
-- Process_Inline --
--------------------
procedure Process_Inline (Active : Boolean) is
Assoc : Node_Id;
Decl : Node_Id;
Subp_Id : Node_Id;
Subp : Entity_Id;
Applies : Boolean;
Effective : Boolean := False;
procedure Make_Inline (Subp : Entity_Id);
-- Subp is the defining unit name of the subprogram
-- declaration. Set the flag, as well as the flag in the
-- corresponding body, if there is one present.
procedure Set_Inline_Flags (Subp : Entity_Id);
-- Sets Is_Inlined and Has_Pragma_Inline flags for Subp
function Inlining_Not_Possible (Subp : Entity_Id) return Boolean;
-- Returns True if it can be determined at this stage that inlining
-- is not possible, for examle if the body is available and contains
-- exception handlers, we prevent inlining, since otherwise we can
-- get undefined symbols at link time. This function also emits a
-- warning if front-end inlining is enabled and the pragma appears
-- too late.
-- ??? is business with link symbols still valid, or does it relate
-- to front end ZCX which is being phased out ???
---------------------------
-- Inlining_Not_Possible --
---------------------------
function Inlining_Not_Possible (Subp : Entity_Id) return Boolean is
Decl : constant Node_Id := Unit_Declaration_Node (Subp);
Stats : Node_Id;
begin
if Nkind (Decl) = N_Subprogram_Body then
Stats := Handled_Statement_Sequence (Decl);
return Present (Exception_Handlers (Stats))
or else Present (At_End_Proc (Stats));
elsif Nkind (Decl) = N_Subprogram_Declaration
and then Present (Corresponding_Body (Decl))
then
if Front_End_Inlining
and then Analyzed (Corresponding_Body (Decl))
then
Error_Msg_N ("pragma appears too late, ignored?", N);
return True;
-- If the subprogram is a renaming as body, the body is
-- just a call to the renamed subprogram, and inlining is
-- trivially possible.
elsif
Nkind (Unit_Declaration_Node (Corresponding_Body (Decl)))
= N_Subprogram_Renaming_Declaration
then
return False;
else
Stats :=
Handled_Statement_Sequence
(Unit_Declaration_Node (Corresponding_Body (Decl)));
return
Present (Exception_Handlers (Stats))
or else Present (At_End_Proc (Stats));
end if;
else
-- If body is not available, assume the best, the check is
-- performed again when compiling enclosing package bodies.
return False;
end if;
end Inlining_Not_Possible;
-----------------
-- Make_Inline --
-----------------
procedure Make_Inline (Subp : Entity_Id) is
Kind : constant Entity_Kind := Ekind (Subp);
Inner_Subp : Entity_Id := Subp;
begin
if Etype (Subp) = Any_Type then
return;
-- If inlining is not possible, for now do not treat as an error
elsif Inlining_Not_Possible (Subp) then
Applies := True;
return;
-- Here we have a candidate for inlining, but we must exclude
-- derived operations. Otherwise we will end up trying to
-- inline a phantom declaration, and the result would be to
-- drag in a body which has no direct inlining associated with
-- it. That would not only be inefficient but would also result
-- in the backend doing cross-unit inlining in cases where it
-- was definitely inappropriate to do so.
-- However, a simple Comes_From_Source test is insufficient,
-- since we do want to allow inlining of generic instances,
-- which also do not come from source. Predefined operators do
-- not come from source but are not inlineable either.
elsif not Comes_From_Source (Subp)
and then not Is_Generic_Instance (Subp)
and then Scope (Subp) /= Standard_Standard
then
Applies := True;
return;
-- The referenced entity must either be the enclosing entity,
-- or an entity declared within the current open scope.
elsif Present (Scope (Subp))
and then Scope (Subp) /= Current_Scope
and then Subp /= Current_Scope
then
Error_Pragma_Arg
("argument of% must be entity in current scope", Assoc);
return;
end if;
-- Processing for procedure, operator or function.
-- If subprogram is aliased (as for an instance) indicate
-- that the renamed entity (if declared in the same unit)
-- is inlined.
if Is_Subprogram (Subp) then
while Present (Alias (Inner_Subp)) loop
Inner_Subp := Alias (Inner_Subp);
end loop;
if In_Same_Source_Unit (Subp, Inner_Subp) then
Set_Inline_Flags (Inner_Subp);
Decl := Parent (Parent (Inner_Subp));
if Nkind (Decl) = N_Subprogram_Declaration
and then Present (Corresponding_Body (Decl))
then
Set_Inline_Flags (Corresponding_Body (Decl));
end if;
end if;
Applies := True;
-- For a generic subprogram set flag as well, for use at
-- the point of instantiation, to determine whether the
-- body should be generated.
elsif Is_Generic_Subprogram (Subp) then
Set_Inline_Flags (Subp);
Applies := True;
-- Literals are by definition inlined
elsif Kind = E_Enumeration_Literal then
null;
-- Anything else is an error
else
Error_Pragma_Arg
("expect subprogram name for pragma%", Assoc);
end if;
end Make_Inline;
----------------------
-- Set_Inline_Flags --
----------------------
procedure Set_Inline_Flags (Subp : Entity_Id) is
begin
if Active then
Set_Is_Inlined (Subp, True);
end if;
if not Has_Pragma_Inline (Subp) then
Set_Has_Pragma_Inline (Subp);
Set_Next_Rep_Item (N, First_Rep_Item (Subp));
Set_First_Rep_Item (Subp, N);
Effective := True;
end if;
end Set_Inline_Flags;
-- Start of processing for Process_Inline
begin
Check_No_Identifiers;
Check_At_Least_N_Arguments (1);
if Active then
Inline_Processing_Required := True;
end if;
Assoc := Arg1;
while Present (Assoc) loop
Subp_Id := Expression (Assoc);
Analyze (Subp_Id);
Applies := False;
if Is_Entity_Name (Subp_Id) then
Subp := Entity (Subp_Id);
if Subp = Any_Id then
-- If previous error, avoid cascaded errors
Applies := True;
Effective := True;
else
Make_Inline (Subp);
while Present (Homonym (Subp))
and then Scope (Homonym (Subp)) = Current_Scope
loop
Make_Inline (Homonym (Subp));
Subp := Homonym (Subp);
end loop;
end if;
end if;
if not Applies then
Error_Pragma_Arg
("inappropriate argument for pragma%", Assoc);
elsif not Effective
and then Warn_On_Redundant_Constructs
then
if Inlining_Not_Possible (Subp) then
Error_Msg_NE
("pragma Inline for& is ignored?", N, Entity (Subp_Id));
else
Error_Msg_NE
("pragma Inline for& is redundant?", N, Entity (Subp_Id));
end if;
end if;
Next (Assoc);
end loop;
end Process_Inline;
----------------------------
-- Process_Interface_Name --
----------------------------
procedure Process_Interface_Name
(Subprogram_Def : Entity_Id;
Ext_Arg : Node_Id;
Link_Arg : Node_Id)
is
Ext_Nam : Node_Id;
Link_Nam : Node_Id;
String_Val : String_Id;
procedure Check_Form_Of_Interface_Name (SN : Node_Id);
-- SN is a string literal node for an interface name. This routine
-- performs some minimal checks that the name is reasonable. In
-- particular that no spaces or other obviously incorrect characters
-- appear. This is only a warning, since any characters are allowed.
----------------------------------
-- Check_Form_Of_Interface_Name --
----------------------------------
procedure Check_Form_Of_Interface_Name (SN : Node_Id) is
S : constant String_Id := Strval (Expr_Value_S (SN));
SL : constant Nat := String_Length (S);
C : Char_Code;
begin
if SL = 0 then
Error_Msg_N ("interface name cannot be null string", SN);
end if;
for J in 1 .. SL loop
C := Get_String_Char (S, J);
if Warn_On_Export_Import
and then (not In_Character_Range (C)
or else Get_Character (C) = ' '
or else Get_Character (C) = ',')
then
Error_Msg_N
("?interface name contains illegal character", SN);
end if;
end loop;
end Check_Form_Of_Interface_Name;
-- Start of processing for Process_Interface_Name
begin
if No (Link_Arg) then
if No (Ext_Arg) then
return;
elsif Chars (Ext_Arg) = Name_Link_Name then
Ext_Nam := Empty;
Link_Nam := Expression (Ext_Arg);
else
Check_Optional_Identifier (Ext_Arg, Name_External_Name);
Ext_Nam := Expression (Ext_Arg);
Link_Nam := Empty;
end if;
else
Check_Optional_Identifier (Ext_Arg, Name_External_Name);
Check_Optional_Identifier (Link_Arg, Name_Link_Name);
Ext_Nam := Expression (Ext_Arg);
Link_Nam := Expression (Link_Arg);
end if;
-- Check expressions for external name and link name are static
if Present (Ext_Nam) then
Check_Arg_Is_Static_Expression (Ext_Nam, Standard_String);
Check_Form_Of_Interface_Name (Ext_Nam);
-- Verify that the external name is not the name of a local
-- entity, which would hide the imported one and lead to
-- run-time surprises. The problem can only arise for entities
-- declared in a package body (otherwise the external name is
-- fully qualified and won't conflict).
declare
Nam : Name_Id;
E : Entity_Id;
Par : Node_Id;
begin
if Prag_Id = Pragma_Import then
String_To_Name_Buffer (Strval (Expr_Value_S (Ext_Nam)));
Nam := Name_Find;
E := Entity_Id (Get_Name_Table_Info (Nam));
if Nam /= Chars (Subprogram_Def)
and then Present (E)
and then not Is_Overloadable (E)
and then Is_Immediately_Visible (E)
and then not Is_Imported (E)
and then Ekind (Scope (E)) = E_Package
then
Par := Parent (E);
while Present (Par) loop
if Nkind (Par) = N_Package_Body then
Error_Msg_Sloc := Sloc (E);
Error_Msg_NE
("imported entity is hidden by & declared#",
Ext_Arg, E);
exit;
end if;
Par := Parent (Par);
end loop;
end if;
end if;
end;
end if;
if Present (Link_Nam) then
Check_Arg_Is_Static_Expression (Link_Nam, Standard_String);
Check_Form_Of_Interface_Name (Link_Nam);
end if;
-- If there is no link name, just set the external name
if No (Link_Nam) then
Link_Nam := Adjust_External_Name_Case (Expr_Value_S (Ext_Nam));
-- For the Link_Name case, the given literal is preceded by an
-- asterisk, which indicates to GCC that the given name should
-- be taken literally, and in particular that no prepending of
-- underlines should occur, even in systems where this is the
-- normal default.
else
Start_String;
Store_String_Char (Get_Char_Code ('*'));
String_Val := Strval (Expr_Value_S (Link_Nam));
for J in 1 .. String_Length (String_Val) loop
Store_String_Char (Get_String_Char (String_Val, J));
end loop;
Link_Nam :=
Make_String_Literal (Sloc (Link_Nam), End_String);
end if;
Set_Encoded_Interface_Name
(Get_Base_Subprogram (Subprogram_Def), Link_Nam);
Check_Duplicated_Export_Name (Link_Nam);
end Process_Interface_Name;
-----------------------------------------
-- Process_Interrupt_Or_Attach_Handler --
-----------------------------------------
procedure Process_Interrupt_Or_Attach_Handler is
Arg1_X : constant Node_Id := Expression (Arg1);
Handler_Proc : constant Entity_Id := Entity (Arg1_X);
Proc_Scope : constant Entity_Id := Scope (Handler_Proc);
begin
Set_Is_Interrupt_Handler (Handler_Proc);
-- If the pragma is not associated with a handler procedure
-- within a protected type, then it must be for a nonprotected
-- procedure for the AAMP target, in which case we don't
-- associate a representation item with the procedure's scope.
if Ekind (Proc_Scope) = E_Protected_Type then
if Prag_Id = Pragma_Interrupt_Handler
or else
Prag_Id = Pragma_Attach_Handler
then
Record_Rep_Item (Proc_Scope, N);
end if;
end if;
end Process_Interrupt_Or_Attach_Handler;
--------------------------------------------------
-- Process_Restrictions_Or_Restriction_Warnings --
--------------------------------------------------
-- Note: some of the simple identifier cases were handled in par-prag,
-- but it is harmless (and more straightforward) to simply handle all
-- cases here, even if it means we repeat a bit of work in some cases.
procedure Process_Restrictions_Or_Restriction_Warnings is
Arg : Node_Id;
R_Id : Restriction_Id;
Id : Name_Id;
Expr : Node_Id;
Val : Uint;
procedure Check_Unit_Name (N : Node_Id);
-- Checks unit name parameter for No_Dependence. Returns if it has
-- an appropriate form, otherwise raises pragma argument error.
procedure Set_Warning (R : All_Restrictions);
-- If this is a Restriction_Warnings pragma, set warning flag,
-- otherwise reset the flag.
---------------------
-- Check_Unit_Name --
---------------------
procedure Check_Unit_Name (N : Node_Id) is
begin
if Nkind (N) = N_Selected_Component then
Check_Unit_Name (Prefix (N));
Check_Unit_Name (Selector_Name (N));
elsif Nkind (N) = N_Identifier then
return;
else
Error_Pragma_Arg
("wrong form for unit name for No_Dependence", N);
end if;
end Check_Unit_Name;
-----------------
-- Set_Warning --
-----------------
procedure Set_Warning (R : All_Restrictions) is
begin
if Prag_Id = Pragma_Restriction_Warnings then
Restriction_Warnings (R) := True;
else
Restriction_Warnings (R) := False;
end if;
end Set_Warning;
-- Start of processing for Process_Restrictions_Or_Restriction_Warnings
begin
Check_Ada_83_Warning;
Check_At_Least_N_Arguments (1);
Check_Valid_Configuration_Pragma;
Arg := Arg1;
while Present (Arg) loop
Id := Chars (Arg);
Expr := Expression (Arg);
-- Case of no restriction identifier present
if Id = No_Name then
if Nkind (Expr) /= N_Identifier then
Error_Pragma_Arg
("invalid form for restriction", Arg);
end if;
R_Id :=
Get_Restriction_Id
(Process_Restriction_Synonyms (Expr));
if R_Id not in All_Boolean_Restrictions then
Error_Pragma_Arg
("invalid restriction identifier", Arg);
end if;
if Implementation_Restriction (R_Id) then
Check_Restriction
(No_Implementation_Restrictions, Arg);
end if;
Set_Restriction (R_Id, N);
Set_Warning (R_Id);
-- A very special case that must be processed here:
-- pragma Restrictions (No_Exceptions) turns off
-- all run-time checking. This is a bit dubious in
-- terms of the formal language definition, but it
-- is what is intended by RM H.4(12).
if R_Id = No_Exceptions then
Scope_Suppress := (others => True);
end if;
-- Case of No_Dependence => unit-name. Note that the parser
-- already made the necessary entry in the No_Dependence table.
elsif Id = Name_No_Dependence then
Check_Unit_Name (Expr);
-- All other cases of restriction identifier present
else
R_Id := Get_Restriction_Id (Process_Restriction_Synonyms (Arg));
Analyze_And_Resolve (Expr, Any_Integer);
if R_Id not in All_Parameter_Restrictions then
Error_Pragma_Arg
("invalid restriction parameter identifier", Arg);
elsif not Is_OK_Static_Expression (Expr) then
Flag_Non_Static_Expr
("value must be static expression!", Expr);
raise Pragma_Exit;
elsif not Is_Integer_Type (Etype (Expr))
or else Expr_Value (Expr) < 0
then
Error_Pragma_Arg
("value must be non-negative integer", Arg);
-- Restriction pragma is active
else
Val := Expr_Value (Expr);
if not UI_Is_In_Int_Range (Val) then
Error_Pragma_Arg
("pragma ignored, value too large?", Arg);
else
Set_Restriction (R_Id, N, Integer (UI_To_Int (Val)));
Set_Warning (R_Id);
end if;
end if;
end if;
Next (Arg);
end loop;
end Process_Restrictions_Or_Restriction_Warnings;
---------------------------------
-- Process_Suppress_Unsuppress --
---------------------------------
-- Note: this procedure makes entries in the check suppress data
-- structures managed by Sem. See spec of package Sem for full
-- details on how we handle recording of check suppression.
procedure Process_Suppress_Unsuppress (Suppress_Case : Boolean) is
C : Check_Id;
E_Id : Node_Id;
E : Entity_Id;
In_Package_Spec : constant Boolean :=
(Ekind (Current_Scope) = E_Package
or else
Ekind (Current_Scope) = E_Generic_Package)
and then not In_Package_Body (Current_Scope);
procedure Suppress_Unsuppress_Echeck (E : Entity_Id; C : Check_Id);
-- Used to suppress a single check on the given entity
--------------------------------
-- Suppress_Unsuppress_Echeck --
--------------------------------
procedure Suppress_Unsuppress_Echeck (E : Entity_Id; C : Check_Id) is
ESR : constant Entity_Check_Suppress_Record :=
(Entity => E,
Check => C,
Suppress => Suppress_Case);
begin
Set_Checks_May_Be_Suppressed (E);
if In_Package_Spec then
Global_Entity_Suppress.Append (ESR);
else
Local_Entity_Suppress.Append (ESR);
end if;
-- If this is a first subtype, and the base type is distinct,
-- then also set the suppress flags on the base type.
if Is_First_Subtype (E)
and then Etype (E) /= E
then
Suppress_Unsuppress_Echeck (Etype (E), C);
end if;
end Suppress_Unsuppress_Echeck;
-- Start of processing for Process_Suppress_Unsuppress
begin
-- Suppress/Unsuppress can appear as a configuration pragma,
-- or in a declarative part or a package spec (RM 11.5(5))
if not Is_Configuration_Pragma then
Check_Is_In_Decl_Part_Or_Package_Spec;
end if;
Check_At_Least_N_Arguments (1);
Check_At_Most_N_Arguments (2);
Check_No_Identifier (Arg1);
Check_Arg_Is_Identifier (Arg1);
if not Is_Check_Name (Chars (Expression (Arg1))) then
Error_Pragma_Arg
("argument of pragma% is not valid check name", Arg1);
else
C := Get_Check_Id (Chars (Expression (Arg1)));
end if;
if Arg_Count = 1 then
-- Make an entry in the local scope suppress table. This is the
-- table that directly shows the current value of the scope
-- suppress check for any check id value.
if C = All_Checks then
-- For All_Checks, we set all specific checks with the
-- exception of Elaboration_Check, which is handled specially
-- because of not wanting All_Checks to have the effect of
-- deactivating static elaboration order processing.
for J in Scope_Suppress'Range loop
if J /= Elaboration_Check then
Scope_Suppress (J) := Suppress_Case;
end if;
end loop;
-- If not All_Checks, just set appropriate entry. Note that we
-- will set Elaboration_Check if this is explicitly specified.
else
Scope_Suppress (C) := Suppress_Case;
end if;
-- Also make an entry in the Local_Entity_Suppress table. See
-- extended description in the package spec of Sem for details.
Local_Entity_Suppress.Append
((Entity => Empty,
Check => C,
Suppress => Suppress_Case));
-- Case of two arguments present, where the check is
-- suppressed for a specified entity (given as the second
-- argument of the pragma)
else
Check_Optional_Identifier (Arg2, Name_On);
E_Id := Expression (Arg2);
Analyze (E_Id);
if not Is_Entity_Name (E_Id) then
Error_Pragma_Arg
("second argument of pragma% must be entity name", Arg2);
end if;
E := Entity (E_Id);
if E = Any_Id then
return;
end if;
-- Enforce RM 11.5(7) which requires that for a pragma that
-- appears within a package spec, the named entity must be
-- within the package spec. We allow the package name itself
-- to be mentioned since that makes sense, although it is not
-- strictly allowed by 11.5(7).
if In_Package_Spec
and then E /= Current_Scope
and then Scope (E) /= Current_Scope
then
Error_Pragma_Arg
("entity in pragma% is not in package spec ('R'M 11.5(7))",
Arg2);
end if;
-- Loop through homonyms. As noted below, in the case of a package
-- spec, only homonyms within the package spec are considered.
loop
Suppress_Unsuppress_Echeck (E, C);
if Is_Generic_Instance (E)
and then Is_Subprogram (E)
and then Present (Alias (E))
then
Suppress_Unsuppress_Echeck (Alias (E), C);
end if;
-- Move to next homonym
E := Homonym (E);
exit when No (E);
-- If we are within a package specification, the
-- pragma only applies to homonyms in the same scope.
exit when In_Package_Spec
and then Scope (E) /= Current_Scope;
end loop;
end if;
end Process_Suppress_Unsuppress;
------------------
-- Set_Exported --
------------------
procedure Set_Exported (E : Entity_Id; Arg : Node_Id) is
begin
if Is_Imported (E) then
Error_Pragma_Arg
("cannot export entity& that was previously imported", Arg);
elsif Present (Address_Clause (E)) then
Error_Pragma_Arg
("cannot export entity& that has an address clause", Arg);
end if;
Set_Is_Exported (E);
-- Generate a reference for entity explicitly, because the
-- identifier may be overloaded and name resolution will not
-- generate one.
Generate_Reference (E, Arg);
-- Deal with exporting non-library level entity
if not Is_Library_Level_Entity (E) then
-- Not allowed at all for subprograms
if Is_Subprogram (E) then
Error_Pragma_Arg ("local subprogram& cannot be exported", Arg);
-- Otherwise set public and statically allocated
else
Set_Is_Public (E);
Set_Is_Statically_Allocated (E);
-- Warn if the corresponding W flag is set and the pragma
-- comes from source. The latter may not be true e.g. on
-- VMS where we expand export pragmas for exception codes
-- associated with imported or exported exceptions. We do
-- not want to generate a warning for something that the
-- user did not write.
if Warn_On_Export_Import
and then Comes_From_Source (Arg)
then
Error_Msg_NE
("?& has been made static as a result of Export", Arg, E);
Error_Msg_N
("\this usage is non-standard and non-portable", Arg);
end if;
end if;
end if;
if Warn_On_Export_Import and then Is_Type (E) then
Error_Msg_NE
("exporting a type has no effect?", Arg, E);
end if;
if Warn_On_Export_Import and Inside_A_Generic then
Error_Msg_NE
("all instances of& will have the same external name?", Arg, E);
end if;
end Set_Exported;
----------------------------------------------
-- Set_Extended_Import_Export_External_Name --
----------------------------------------------
procedure Set_Extended_Import_Export_External_Name
(Internal_Ent : Entity_Id;
Arg_External : Node_Id)
is
Old_Name : constant Node_Id := Interface_Name (Internal_Ent);
New_Name : Node_Id;
begin
if No (Arg_External) then
return;
end if;
Check_Arg_Is_External_Name (Arg_External);
if Nkind (Arg_External) = N_String_Literal then
if String_Length (Strval (Arg_External)) = 0 then
return;
else
New_Name := Adjust_External_Name_Case (Arg_External);
end if;
elsif Nkind (Arg_External) = N_Identifier then
New_Name := Get_Default_External_Name (Arg_External);
-- Check_Arg_Is_External_Name should let through only
-- identifiers and string literals or static string
-- expressions (which are folded to string literals).
else
raise Program_Error;
end if;
-- If we already have an external name set (by a prior normal
-- Import or Export pragma), then the external names must match
if Present (Interface_Name (Internal_Ent)) then
Check_Matching_Internal_Names : declare
S1 : constant String_Id := Strval (Old_Name);
S2 : constant String_Id := Strval (New_Name);
procedure Mismatch;
-- Called if names do not match
--------------
-- Mismatch --
--------------
procedure Mismatch is
begin
Error_Msg_Sloc := Sloc (Old_Name);
Error_Pragma_Arg
("external name does not match that given #",
Arg_External);
end Mismatch;
-- Start of processing for Check_Matching_Internal_Names
begin
if String_Length (S1) /= String_Length (S2) then
Mismatch;
else
for J in 1 .. String_Length (S1) loop
if Get_String_Char (S1, J) /= Get_String_Char (S2, J) then
Mismatch;
end if;
end loop;
end if;
end Check_Matching_Internal_Names;
-- Otherwise set the given name
else
Set_Encoded_Interface_Name (Internal_Ent, New_Name);
Check_Duplicated_Export_Name (New_Name);
end if;
end Set_Extended_Import_Export_External_Name;
------------------
-- Set_Imported --
------------------
procedure Set_Imported (E : Entity_Id) is
begin
Error_Msg_Sloc := Sloc (E);
if Is_Exported (E) or else Is_Imported (E) then
Error_Msg_NE ("import of& declared# not allowed", N, E);
if Is_Exported (E) then
Error_Msg_N ("\entity was previously exported", N);
else
Error_Msg_N ("\entity was previously imported", N);
end if;
Error_Pragma ("\(pragma% applies to all previous entities)");
else
Set_Is_Imported (E);
-- If the entity is an object that is not at the library
-- level, then it is statically allocated. We do not worry
-- about objects with address clauses in this context since
-- they are not really imported in the linker sense.
if Is_Object (E)
and then not Is_Library_Level_Entity (E)
and then No (Address_Clause (E))
then
Set_Is_Statically_Allocated (E);
end if;
end if;
end Set_Imported;
-------------------------
-- Set_Mechanism_Value --
-------------------------
-- Note: the mechanism name has not been analyzed (and cannot indeed
-- be analyzed, since it is semantic nonsense), so we get it in the
-- exact form created by the parser.
procedure Set_Mechanism_Value (Ent : Entity_Id; Mech_Name : Node_Id) is
Class : Node_Id;
Param : Node_Id;
procedure Bad_Class;
-- Signal bad descriptor class name
procedure Bad_Mechanism;
-- Signal bad mechanism name
---------------
-- Bad_Class --
---------------
procedure Bad_Class is
begin
Error_Pragma_Arg ("unrecognized descriptor class name", Class);
end Bad_Class;
-------------------------
-- Bad_Mechanism_Value --
-------------------------
procedure Bad_Mechanism is
begin
Error_Pragma_Arg ("unrecognized mechanism name", Mech_Name);
end Bad_Mechanism;
-- Start of processing for Set_Mechanism_Value
begin
if Mechanism (Ent) /= Default_Mechanism then
Error_Msg_NE
("mechanism for & has already been set", Mech_Name, Ent);
end if;
-- MECHANISM_NAME ::= value | reference | descriptor
if Nkind (Mech_Name) = N_Identifier then
if Chars (Mech_Name) = Name_Value then
Set_Mechanism (Ent, By_Copy);
return;
elsif Chars (Mech_Name) = Name_Reference then
Set_Mechanism (Ent, By_Reference);
return;
elsif Chars (Mech_Name) = Name_Descriptor then
Check_VMS (Mech_Name);
Set_Mechanism (Ent, By_Descriptor);
return;
elsif Chars (Mech_Name) = Name_Copy then
Error_Pragma_Arg
("bad mechanism name, Value assumed", Mech_Name);
else
Bad_Mechanism;
end if;
-- MECHANISM_NAME ::= descriptor (CLASS_NAME)
-- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
-- Note: this form is parsed as an indexed component
elsif Nkind (Mech_Name) = N_Indexed_Component then
Class := First (Expressions (Mech_Name));
if Nkind (Prefix (Mech_Name)) /= N_Identifier
or else Chars (Prefix (Mech_Name)) /= Name_Descriptor
or else Present (Next (Class))
then
Bad_Mechanism;
end if;
-- MECHANISM_NAME ::= descriptor (Class => CLASS_NAME)
-- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
-- Note: this form is parsed as a function call
elsif Nkind (Mech_Name) = N_Function_Call then
Param := First (Parameter_Associations (Mech_Name));
if Nkind (Name (Mech_Name)) /= N_Identifier
or else Chars (Name (Mech_Name)) /= Name_Descriptor
or else Present (Next (Param))
or else No (Selector_Name (Param))
or else Chars (Selector_Name (Param)) /= Name_Class
then
Bad_Mechanism;
else
Class := Explicit_Actual_Parameter (Param);
end if;
else
Bad_Mechanism;
end if;
-- Fall through here with Class set to descriptor class name
Check_VMS (Mech_Name);
if Nkind (Class) /= N_Identifier then
Bad_Class;
elsif Chars (Class) = Name_UBS then
Set_Mechanism (Ent, By_Descriptor_UBS);
elsif Chars (Class) = Name_UBSB then
Set_Mechanism (Ent, By_Descriptor_UBSB);
elsif Chars (Class) = Name_UBA then
Set_Mechanism (Ent, By_Descriptor_UBA);
elsif Chars (Class) = Name_S then
Set_Mechanism (Ent, By_Descriptor_S);
elsif Chars (Class) = Name_SB then
Set_Mechanism (Ent, By_Descriptor_SB);
elsif Chars (Class) = Name_A then
Set_Mechanism (Ent, By_Descriptor_A);
elsif Chars (Class) = Name_NCA then
Set_Mechanism (Ent, By_Descriptor_NCA);
else
Bad_Class;
end if;
end Set_Mechanism_Value;
---------------------------
-- Set_Ravenscar_Profile --
---------------------------
-- The tasks to be done here are
-- Set required policies
-- pragma Task_Dispatching_Policy (FIFO_Within_Priorities)
-- pragma Locking_Policy (Ceiling_Locking)
-- Set Detect_Blocking mode
-- Set required restrictions (see System.Rident for detailed list)
procedure Set_Ravenscar_Profile (N : Node_Id) is
begin
-- pragma Task_Dispatching_Policy (FIFO_Within_Priorities)
if Task_Dispatching_Policy /= ' '
and then Task_Dispatching_Policy /= 'F'
then
Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
Error_Pragma ("Profile (Ravenscar) incompatible with policy#");
-- Set the FIFO_Within_Priorities policy, but always preserve
-- System_Location since we like the error message with the run time
-- name.
else
Task_Dispatching_Policy := 'F';
if Task_Dispatching_Policy_Sloc /= System_Location then
Task_Dispatching_Policy_Sloc := Loc;
end if;
end if;
-- pragma Locking_Policy (Ceiling_Locking)
if Locking_Policy /= ' '
and then Locking_Policy /= 'C'
then
Error_Msg_Sloc := Locking_Policy_Sloc;
Error_Pragma ("Profile (Ravenscar) incompatible with policy#");
-- Set the Ceiling_Locking policy, but preserve System_Location since
-- we like the error message with the run time name.
else
Locking_Policy := 'C';
if Locking_Policy_Sloc /= System_Location then
Locking_Policy_Sloc := Loc;
end if;
end if;
-- pragma Detect_Blocking
Detect_Blocking := True;
-- Set the corresponding restrictions
Set_Profile_Restrictions (Ravenscar, N, Warn => False);
end Set_Ravenscar_Profile;
-- Start of processing for Analyze_Pragma
begin
if not Is_Pragma_Name (Chars (N)) then
if Warn_On_Unrecognized_Pragma then
Error_Pragma ("unrecognized pragma%?");
else
return;
end if;
else
Prag_Id := Get_Pragma_Id (Chars (N));
end if;
-- Preset arguments
Arg1 := Empty;
Arg2 := Empty;
Arg3 := Empty;
Arg4 := Empty;
if Present (Pragma_Argument_Associations (N)) then
Arg1 := First (Pragma_Argument_Associations (N));
if Present (Arg1) then
Arg2 := Next (Arg1);
if Present (Arg2) then
Arg3 := Next (Arg2);
if Present (Arg3) then
Arg4 := Next (Arg3);
end if;
end if;
end if;
end if;
-- Count number of arguments
declare
Arg_Node : Node_Id;
begin
Arg_Count := 0;
Arg_Node := Arg1;
while Present (Arg_Node) loop
Arg_Count := Arg_Count + 1;
Next (Arg_Node);
end loop;
end;
-- An enumeration type defines the pragmas that are supported by the
-- implementation. Get_Pragma_Id (in package Prag) transorms a name
-- into the corresponding enumeration value for the following case.
case Prag_Id is
-----------------
-- Abort_Defer --
-----------------
-- pragma Abort_Defer;
when Pragma_Abort_Defer =>
GNAT_Pragma;
Check_Arg_Count (0);
-- The only required semantic processing is to check the
-- placement. This pragma must appear at the start of the
-- statement sequence of a handled sequence of statements.
if Nkind (Parent (N)) /= N_Handled_Sequence_Of_Statements
or else N /= First (Statements (Parent (N)))
then
Pragma_Misplaced;
end if;
------------
-- Ada_83 --
------------
-- pragma Ada_83;
-- Note: this pragma also has some specific processing in Par.Prag
-- because we want to set the Ada version mode during parsing.
when Pragma_Ada_83 =>
GNAT_Pragma;
Ada_Version := Ada_83;
Ada_Version_Explicit := Ada_Version;
Check_Arg_Count (0);
------------
-- Ada_95 --
------------
-- pragma Ada_95;
-- Note: this pragma also has some specific processing in Par.Prag
-- because we want to set the Ada 83 version mode during parsing.
when Pragma_Ada_95 =>
GNAT_Pragma;
Ada_Version := Ada_95;
Ada_Version_Explicit := Ada_Version;
Check_Arg_Count (0);
---------------------
-- Ada_05/Ada_2005 --
---------------------
-- pragma Ada_05;
-- pragma Ada_05 (LOCAL_NAME);
-- pragma Ada_2005;
-- pragma Ada_2005 (LOCAL_NAME):
-- Note: these pragma also have some specific processing in Par.Prag
-- because we want to set the Ada 2005 version mode during parsing.
when Pragma_Ada_05 | Pragma_Ada_2005 => declare
E_Id : Node_Id;
begin
GNAT_Pragma;
if Arg_Count = 1 then
Check_Arg_Is_Local_Name (Arg1);
E_Id := Expression (Arg1);
if Etype (E_Id) = Any_Type then
return;
end if;
Set_Is_Ada_2005 (Entity (E_Id));
else
Check_Arg_Count (0);
Ada_Version := Ada_05;
Ada_Version_Explicit := Ada_05;
end if;
end;
----------------------
-- All_Calls_Remote --
----------------------
-- pragma All_Calls_Remote [(library_package_NAME)];
when Pragma_All_Calls_Remote => All_Calls_Remote : declare
Lib_Entity : Entity_Id;
begin
Check_Ada_83_Warning;
Check_Valid_Library_Unit_Pragma;
if Nkind (N) = N_Null_Statement then
return;
end if;
Lib_Entity := Find_Lib_Unit_Name;
-- This pragma should only apply to a RCI unit (RM E.2.3(23))
if Present (Lib_Entity)
and then not Debug_Flag_U
then
if not Is_Remote_Call_Interface (Lib_Entity) then
Error_Pragma ("pragma% only apply to rci unit");
-- Set flag for entity of the library unit
else
Set_Has_All_Calls_Remote (Lib_Entity);
end if;
end if;
end All_Calls_Remote;
--------------
-- Annotate --
--------------
-- pragma Annotate (IDENTIFIER {, ARG});
-- ARG ::= NAME | EXPRESSION
when Pragma_Annotate => Annotate : begin
GNAT_Pragma;
Check_At_Least_N_Arguments (1);
Check_Arg_Is_Identifier (Arg1);
declare
Arg : Node_Id := Arg2;
Exp : Node_Id;
begin
while Present (Arg) loop
Exp := Expression (Arg);
Analyze (Exp);
if Is_Entity_Name (Exp) then
null;
elsif Nkind (Exp) = N_String_Literal then
Resolve (Exp, Standard_String);
elsif Is_Overloaded (Exp) then
Error_Pragma_Arg ("ambiguous argument for pragma%", Exp);
else
Resolve (Exp);
end if;
Next (Arg);
end loop;
end;
end Annotate;
------------
-- Assert --
------------
-- pragma Assert ([Check =>] Boolean_EXPRESSION
-- [, [Message =>] Static_String_EXPRESSION]);
when Pragma_Assert =>
Check_At_Least_N_Arguments (1);
Check_At_Most_N_Arguments (2);
Check_Arg_Order ((Name_Check, Name_Message));
Check_Optional_Identifier (Arg1, Name_Check);
if Arg_Count > 1 then
Check_Optional_Identifier (Arg2, Name_Message);
Check_Arg_Is_Static_Expression (Arg2, Standard_String);
end if;
-- If expansion is active and assertions are inactive, then
-- we rewrite the Assertion as:
-- if False and then condition then
-- null;
-- end if;
-- The reason we do this rewriting during semantic analysis
-- rather than as part of normal expansion is that we cannot
-- analyze and expand the code for the boolean expression
-- directly, or it may cause insertion of actions that would
-- escape the attempt to suppress the assertion code.
if Expander_Active and not Assertions_Enabled then
Rewrite (N,
Make_If_Statement (Loc,
Condition =>
Make_And_Then (Loc,
Left_Opnd => New_Occurrence_Of (Standard_False, Loc),
Right_Opnd => Get_Pragma_Arg (Arg1)),
Then_Statements => New_List (
Make_Null_Statement (Loc))));
Analyze (N);
-- Otherwise (if assertions are enabled, or if we are not
-- operating with expansion active), then we just analyze
-- and resolve the expression.
else
Analyze_And_Resolve (Expression (Arg1), Any_Boolean);
end if;
----------------------
-- Assertion_Policy --
----------------------
-- pragma Assertion_Policy (Check | Ignore)
when Pragma_Assertion_Policy =>
Check_Arg_Count (1);
Check_Arg_Is_One_Of (Arg1, Name_Check, Name_Ignore);
Assertions_Enabled := Chars (Expression (Arg1)) = Name_Check;
---------------
-- AST_Entry --
---------------
-- pragma AST_Entry (entry_IDENTIFIER);
when Pragma_AST_Entry => AST_Entry : declare
Ent : Node_Id;
begin
GNAT_Pragma;
Check_VMS (N);
Check_Arg_Count (1);
Check_No_Identifiers;
Check_Arg_Is_Local_Name (Arg1);
Ent := Entity (Expression (Arg1));
-- Note: the implementation of the AST_Entry pragma could handle
-- the entry family case fine, but for now we are consistent with
-- the DEC rules, and do not allow the pragma, which of course
-- has the effect of also forbidding the attribute.
if Ekind (Ent) /= E_Entry then
Error_Pragma_Arg
("pragma% argument must be simple entry name", Arg1);
elsif Is_AST_Entry (Ent) then
Error_Pragma_Arg
("duplicate % pragma for entry", Arg1);
elsif Has_Homonym (Ent) then
Error_Pragma_Arg
("pragma% argument cannot specify overloaded entry", Arg1);
else
declare
FF : constant Entity_Id := First_Formal (Ent);
begin
if Present (FF) then
if Present (Next_Formal (FF)) then
Error_Pragma_Arg
("entry for pragma% can have only one argument",
Arg1);
elsif Parameter_Mode (FF) /= E_In_Parameter then
Error_Pragma_Arg
("entry parameter for pragma% must have mode IN",
Arg1);
end if;
end if;
end;
Set_Is_AST_Entry (Ent);
end if;
end AST_Entry;
------------------
-- Asynchronous --
------------------
-- pragma Asynchronous (LOCAL_NAME);
when Pragma_Asynchronous => Asynchronous : declare
Nm : Entity_Id;
C_Ent : Entity_Id;
L : List_Id;
S : Node_Id;
N : Node_Id;
Formal : Entity_Id;
procedure Process_Async_Pragma;
-- Common processing for procedure and access-to-procedure case
--------------------------
-- Process_Async_Pragma --
--------------------------
procedure Process_Async_Pragma is
begin
if No (L) then
Set_Is_Asynchronous (Nm);
return;
end if;
-- The formals should be of mode IN (RM E.4.1(6))
S := First (L);
while Present (S) loop
Formal := Defining_Identifier (S);
if Nkind (Formal) = N_Defining_Identifier
and then Ekind (Formal) /= E_In_Parameter
then
Error_Pragma_Arg
("pragma% procedure can only have IN parameter",
Arg1);
end if;
Next (S);
end loop;
Set_Is_Asynchronous (Nm);
end Process_Async_Pragma;
-- Start of processing for pragma Asynchronous
begin
Check_Ada_83_Warning;
Check_No_Identifiers;
Check_Arg_Count (1);
Check_Arg_Is_Local_Name (Arg1);
if Debug_Flag_U then
return;
end if;
C_Ent := Cunit_Entity (Current_Sem_Unit);
Analyze (Expression (Arg1));
Nm := Entity (Expression (Arg1));
if not Is_Remote_Call_Interface (C_Ent)
and then not Is_Remote_Types (C_Ent)
then
-- This pragma should only appear in an RCI or Remote Types
-- unit (RM E.4.1(4))
Error_Pragma
("pragma% not in Remote_Call_Interface or " &
"Remote_Types unit");
end if;
if Ekind (Nm) = E_Procedure
and then Nkind (Parent (Nm)) = N_Procedure_Specification
then
if not Is_Remote_Call_Interface (Nm) then
Error_Pragma_Arg
("pragma% cannot be applied on non-remote procedure",
Arg1);
end if;
L := Parameter_Specifications (Parent (Nm));
Process_Async_Pragma;
return;
elsif Ekind (Nm) = E_Function then
Error_Pragma_Arg
("pragma% cannot be applied to function", Arg1);
elsif Is_Remote_Access_To_Subprogram_Type (Nm) then
if Is_Record_Type (Nm) then
-- A record type that is the Equivalent_Type for
-- a remote access-to-subprogram type.
N := Declaration_Node (Corresponding_Remote_Type (Nm));
else
-- A non-expanded RAS type (case where distribution is
-- not enabled).
N := Declaration_Node (Nm);
end if;
if Nkind (N) = N_Full_Type_Declaration
and then Nkind (Type_Definition (N)) =
N_Access_Procedure_Definition
then
L := Parameter_Specifications (Type_Definition (N));
Process_Async_Pragma;
if Is_Asynchronous (Nm)
and then Expander_Active
and then Get_PCS_Name /= Name_No_DSA
then
RACW_Type_Is_Asynchronous (Underlying_RACW_Type (Nm));
end if;
else
Error_Pragma_Arg
("pragma% cannot reference access-to-function type",
Arg1);
end if;
-- Only other possibility is Access-to-class-wide type
elsif Is_Access_Type (Nm)
and then Is_Class_Wide_Type (Designated_Type (Nm))
then
Check_First_Subtype (Arg1);
Set_Is_Asynchronous (Nm);
if Expander_Active then
RACW_Type_Is_Asynchronous (Nm);
end if;
else
Error_Pragma_Arg ("inappropriate argument for pragma%", Arg1);
end if;
end Asynchronous;
------------
-- Atomic --
------------
-- pragma Atomic (LOCAL_NAME);
when Pragma_Atomic =>
Process_Atomic_Shared_Volatile;
-----------------------
-- Atomic_Components --
-----------------------
-- pragma Atomic_Components (array_LOCAL_NAME);
-- This processing is shared by Volatile_Components
when Pragma_Atomic_Components |
Pragma_Volatile_Components =>
Atomic_Components : declare
E_Id : Node_Id;
E : Entity_Id;
D : Node_Id;
K : Node_Kind;
begin
Check_Ada_83_Warning;
Check_No_Identifiers;
Check_Arg_Count (1);
Check_Arg_Is_Local_Name (Arg1);
E_Id := Expression (Arg1);
if Etype (E_Id) = Any_Type then
return;
end if;
E := Entity (E_Id);
if Rep_Item_Too_Early (E, N)
or else
Rep_Item_Too_Late (E, N)
then
return;
end if;
D := Declaration_Node (E);
K := Nkind (D);
if (K = N_Full_Type_Declaration and then Is_Array_Type (E))
or else
((Ekind (E) = E_Constant or else Ekind (E) = E_Variable)
and then Nkind (D) = N_Object_Declaration
and then Nkind (Object_Definition (D)) =
N_Constrained_Array_Definition)
then
-- The flag is set on the object, or on the base type
if Nkind (D) /= N_Object_Declaration then
E := Base_Type (E);
end if;
Set_Has_Volatile_Components (E);
if Prag_Id = Pragma_Atomic_Components then
Set_Has_Atomic_Components (E);
if Is_Packed (E) then
Set_Is_Packed (E, False);
Error_Pragma_Arg
("?Pack canceled, cannot pack atomic components",
Arg1);
end if;
end if;
else
Error_Pragma_Arg ("inappropriate entity for pragma%", Arg1);
end if;
end Atomic_Components;
--------------------
-- Attach_Handler --
--------------------
-- pragma Attach_Handler (handler_NAME, EXPRESSION);
when Pragma_Attach_Handler =>
Check_Ada_83_Warning;
Check_No_Identifiers;
Check_Arg_Count (2);
if No_Run_Time_Mode then
Error_Msg_CRT ("Attach_Handler pragma", N);
else
Check_Interrupt_Or_Attach_Handler;
-- The expression that designates the attribute may
-- depend on a discriminant, and is therefore a per-
-- object expression, to be expanded in the init proc.
-- If expansion is enabled, perform semantic checks
-- on a copy only.
if Expander_Active then
declare
Temp : constant Node_Id :=
New_Copy_Tree (Expression (Arg2));
begin
Set_Parent (Temp, N);
Pre_Analyze_And_Resolve (Temp, RTE (RE_Interrupt_ID));
end;
else
Analyze (Expression (Arg2));
Resolve (Expression (Arg2), RTE (RE_Interrupt_ID));
end if;
Process_Interrupt_Or_Attach_Handler;
end if;
--------------------
-- C_Pass_By_Copy --
--------------------
-- pragma C_Pass_By_Copy ([Max_Size =>] static_integer_EXPRESSION);
when Pragma_C_Pass_By_Copy => C_Pass_By_Copy : declare
Arg : Node_Id;
Val : Uint;
begin
GNAT_Pragma;
Check_Valid_Configuration_Pragma;
Check_Arg_Count (1);
Check_Optional_Identifier (Arg1, "max_size");
Arg := Expression (Arg1);
Check_Arg_Is_Static_Expression (Arg, Any_Integer);
Val := Expr_Value (Arg);
if Val <= 0 then
Error_Pragma_Arg
("maximum size for pragma% must be positive", Arg1);
elsif UI_Is_In_Int_Range (Val) then
Default_C_Record_Mechanism := UI_To_Int (Val);
-- If a giant value is given, Int'Last will do well enough.
-- If sometime someone complains that a record larger than
-- two gigabytes is not copied, we will worry about it then!
else
Default_C_Record_Mechanism := Mechanism_Type'Last;
end if;
end C_Pass_By_Copy;
-------------
-- Comment --
-------------
-- pragma Comment (static_string_EXPRESSION)
-- Processing for pragma Comment shares the circuitry for
-- pragma Ident. The only differences are that Ident enforces
-- a limit of 31 characters on its argument, and also enforces
-- limitations on placement for DEC compatibility. Pragma
-- Comment shares neither of these restrictions.
-------------------
-- Common_Object --
-------------------
-- pragma Common_Object (
-- [Internal =>] LOCAL_NAME,
-- [, [External =>] EXTERNAL_SYMBOL]
-- [, [Size =>] EXTERNAL_SYMBOL]);
-- Processing for this pragma is shared with Psect_Object
--------------------------
-- Compile_Time_Warning --
--------------------------
-- pragma Compile_Time_Warning
-- (boolean_EXPRESSION, static_string_EXPRESSION);
when Pragma_Compile_Time_Warning => Compile_Time_Warning : declare
Arg1x : constant Node_Id := Get_Pragma_Arg (Arg1);
begin
GNAT_Pragma;
Check_Arg_Count (2);
Check_No_Identifiers;
Check_Arg_Is_Static_Expression (Arg2, Standard_String);
Analyze_And_Resolve (Arg1x, Standard_Boolean);
if Compile_Time_Known_Value (Arg1x) then
if Is_True (Expr_Value (Get_Pragma_Arg (Arg1))) then
String_To_Name_Buffer (Strval (Get_Pragma_Arg (Arg2)));
Add_Char_To_Name_Buffer ('?');
declare
Msg : String (1 .. Name_Len) :=
Name_Buffer (1 .. Name_Len);
B : Natural;
begin
-- This loop looks for multiple lines separated by
-- ASCII.LF and breaks them into continuation error
-- messages marked with the usual back slash.
B := 1;
for S in 2 .. Msg'Length - 1 loop
if Msg (S) = ASCII.LF then
Msg (S) := '?';
Error_Msg_N (Msg (B .. S), Arg1);
B := S;
Msg (B) := '\';
end if;
end loop;
Error_Msg_N (Msg (B .. Msg'Length), Arg1);
end;
end if;
end if;
end Compile_Time_Warning;
-----------------------------
-- Complete_Representation --
-----------------------------
-- pragma Complete_Representation;
when Pragma_Complete_Representation =>
GNAT_Pragma;
Check_Arg_Count (0);
if Nkind (Parent (N)) /= N_Record_Representation_Clause then
Error_Pragma
("pragma & must appear within record representation clause");
end if;
----------------------------
-- Complex_Representation --
----------------------------
-- pragma Complex_Representation ([Entity =>] LOCAL_NAME);
when Pragma_Complex_Representation => Complex_Representation : declare
E_Id : Entity_Id;
E : Entity_Id;
Ent : Entity_Id;
begin
GNAT_Pragma;
Check_Arg_Count (1);
Check_Optional_Identifier (Arg1, Name_Entity);
Check_Arg_Is_Local_Name (Arg1);
E_Id := Expression (Arg1);
if Etype (E_Id) = Any_Type then
return;
end if;
E := Entity (E_Id);
if not Is_Record_Type (E) then
Error_Pragma_Arg
("argument for pragma% must be record type", Arg1);
end if;
Ent := First_Entity (E);
if No (Ent)
or else No (Next_Entity (Ent))
or else Present (Next_Entity (Next_Entity (Ent)))
or else not Is_Floating_Point_Type (Etype (Ent))
or else Etype (Ent) /= Etype (Next_Entity (Ent))
then
Error_Pragma_Arg
("record for pragma% must have two fields of same fpt type",
Arg1);
else
Set_Has_Complex_Representation (Base_Type (E));
end if;
end Complex_Representation;
-------------------------
-- Component_Alignment --
-------------------------
-- pragma Component_Alignment (
-- [Form =>] ALIGNMENT_CHOICE
-- [, [Name =>] type_LOCAL_NAME]);
--
-- ALIGNMENT_CHOICE ::=
-- Component_Size
-- | Component_Size_4
-- | Storage_Unit
-- | Default
when Pragma_Component_Alignment => Component_AlignmentP : declare
Args : Args_List (1 .. 2);
Names : constant Name_List (1 .. 2) := (
Name_Form,
Name_Name);
Form : Node_Id renames Args (1);
Name : Node_Id renames Args (2);
Atype : Component_Alignment_Kind;
Typ : Entity_Id;
begin
GNAT_Pragma;
Gather_Associations (Names, Args);
if No (Form) then
Error_Pragma ("missing Form argument for pragma%");
end if;
Check_Arg_Is_Identifier (Form);
-- Get proper alignment, note that Default = Component_Size
-- on all machines we have so far, and we want to set this
-- value rather than the default value to indicate that it
-- has been explicitly set (and thus will not get overridden
-- by the default component alignment for the current scope)
if Chars (Form) = Name_Component_Size then
Atype := Calign_Component_Size;
elsif Chars (Form) = Name_Component_Size_4 then
Atype := Calign_Component_Size_4;
elsif Chars (Form) = Name_Default then
Atype := Calign_Component_Size;
elsif Chars (Form) = Name_Storage_Unit then
Atype := Calign_Storage_Unit;
else
Error_Pragma_Arg
("invalid Form parameter for pragma%", Form);
end if;
-- Case with no name, supplied, affects scope table entry
if No (Name) then
Scope_Stack.Table
(Scope_Stack.Last).Component_Alignment_Default := Atype;
-- Case of name supplied
else
Check_Arg_Is_Local_Name (Name);
Find_Type (Name);
Typ := Entity (Name);
if Typ = Any_Type
or else Rep_Item_Too_Early (Typ, N)
then
return;
else
Typ := Underlying_Type (Typ);
end if;
if not Is_Record_Type (Typ)
and then not Is_Array_Type (Typ)
then
Error_Pragma_Arg
("Name parameter of pragma% must identify record or " &
"array type", Name);
end if;
-- An explicit Component_Alignment pragma overrides an
-- implicit pragma Pack, but not an explicit one.
if not Has_Pragma_Pack (Base_Type (Typ)) then
Set_Is_Packed (Base_Type (Typ), False);
Set_Component_Alignment (Base_Type (Typ), Atype);
end if;
end if;
end Component_AlignmentP;
----------------
-- Controlled --
----------------
-- pragma Controlled (first_subtype_LOCAL_NAME);
when Pragma_Controlled => Controlled : declare
Arg : Node_Id;
begin
Check_No_Identifiers;
Check_Arg_Count (1);
Check_Arg_Is_Local_Name (Arg1);
Arg := Expression (Arg1);
if not Is_Entity_Name (Arg)
or else not Is_Access_Type (Entity (Arg))
then
Error_Pragma_Arg ("pragma% requires access type", Arg1);
else
Set_Has_Pragma_Controlled (Base_Type (Entity (Arg)));
end if;
end Controlled;
----------------
-- Convention --
----------------
-- pragma Convention ([Convention =>] convention_IDENTIFIER,
-- [Entity =>] LOCAL_NAME);
when Pragma_Convention => Convention : declare
C : Convention_Id;
E : Entity_Id;
begin
Check_Arg_Order ((Name_Convention, Name_Entity));
Check_Ada_83_Warning;
Check_Arg_Count (2);
Process_Convention (C, E);
end Convention;
---------------------------
-- Convention_Identifier --
---------------------------
-- pragma Convention_Identifier ([Name =>] IDENTIFIER,
-- [Convention =>] convention_IDENTIFIER);
when Pragma_Convention_Identifier => Convention_Identifier : declare
Idnam : Name_Id;
Cname : Name_Id;
begin
GNAT_Pragma;
Check_Arg_Order ((Name_Name, Name_Convention));
Check_Arg_Count (2);
Check_Optional_Identifier (Arg1, Name_Name);
Check_Optional_Identifier (Arg2, Name_Convention);
Check_Arg_Is_Identifier (Arg1);
Check_Arg_Is_Identifier (Arg1);
Idnam := Chars (Expression (Arg1));
Cname := Chars (Expression (Arg2));
if Is_Convention_Name (Cname) then
Record_Convention_Identifier
(Idnam, Get_Convention_Id (Cname));
else
Error_Pragma_Arg
("second arg for % pragma must be convention", Arg2);
end if;
end Convention_Identifier;
---------------
-- CPP_Class --
---------------
-- pragma CPP_Class ([Entity =>] local_NAME)
when Pragma_CPP_Class => CPP_Class : declare
Arg : Node_Id;
Typ : Entity_Id;
Default_DTC : Entity_Id := Empty;
VTP_Type : constant Entity_Id := RTE (RE_Vtable_Ptr);
C : Entity_Id;
Tag_C : Entity_Id;
begin
GNAT_Pragma;
Check_Arg_Count (1);
Check_Optional_Identifier (Arg1, Name_Entity);
Check_Arg_Is_Local_Name (Arg1);
Arg := Expression (Arg1);
Analyze (Arg);
if Etype (Arg) = Any_Type then
return;
end if;
if not Is_Entity_Name (Arg)
or else not Is_Type (Entity (Arg))
then
Error_Pragma_Arg ("pragma% requires a type mark", Arg1);
end if;
Typ := Entity (Arg);
if not Is_Record_Type (Typ) then
Error_Pragma_Arg ("pragma% applicable to a record, "
& "tagged record or record extension", Arg1);
end if;
Default_DTC := First_Component (Typ);
while Present (Default_DTC)
and then Etype (Default_DTC) /= VTP_Type
loop
Next_Component (Default_DTC);
end loop;
-- Case of non tagged type
if not Is_Tagged_Type (Typ) then
Set_Is_CPP_Class (Typ);
if Present (Default_DTC) then
Error_Pragma_Arg
("only tagged records can contain vtable pointers", Arg1);
end if;
-- Case of tagged type with no user-defined vtable ptr. In this
-- case, because of our C++ ABI compatibility, the programmer
-- does not need to specify the tag component.
elsif Is_Tagged_Type (Typ)
and then No (Default_DTC)
then
Set_Is_CPP_Class (Typ);
Set_Is_Limited_Record (Typ);
-- Tagged type that has a vtable ptr
elsif Present (Default_DTC) then
Set_Is_CPP_Class (Typ);
Set_Is_Limited_Record (Typ);
Set_Is_Tag (Default_DTC);
Set_DT_Entry_Count (Default_DTC, No_Uint);
-- Since a CPP type has no direct link to its associated tag
-- most tags checks cannot be performed
Set_Kill_Tag_Checks (Typ);
Set_Kill_Tag_Checks (Class_Wide_Type (Typ));
-- Get rid of the _tag component when there was one.
-- It is only useful for regular tagged types
if Expander_Active and then Typ = Root_Type (Typ) then
Tag_C := First_Tag_Component (Typ);
C := First_Entity (Typ);
if C = Tag_C then
Set_First_Entity (Typ, Next_Entity (Tag_C));
else
while Next_Entity (C) /= Tag_C loop
Next_Entity (C);
end loop;
Set_Next_Entity (C, Next_Entity (Tag_C));
end if;
end if;
end if;
end CPP_Class;
---------------------
-- CPP_Constructor --
---------------------
-- pragma CPP_Constructor ([Entity =>] LOCAL_NAME);
when Pragma_CPP_Constructor => CPP_Constructor : declare
Id : Entity_Id;
Def_Id : Entity_Id;
begin
GNAT_Pragma;
Check_Arg_Count (1);
Check_Optional_Identifier (Arg1, Name_Entity);
Check_Arg_Is_Local_Name (Arg1);
Id := Expression (Arg1);
Find_Program_Unit_Name (Id);
-- If we did not find the name, we are done
if Etype (Id) = Any_Type then
return;
end if;
Def_Id := Entity (Id);
if Ekind (Def_Id) = E_Function
and then Is_Class_Wide_Type (Etype (Def_Id))
and then Is_CPP_Class (Etype (Etype (Def_Id)))
then
-- What the heck is this??? this pragma allows only 1 arg
if Arg_Count >= 2 then
Check_At_Most_N_Arguments (3);
Process_Interface_Name (Def_Id, Arg2, Arg3);
end if;
if No (Parameter_Specifications (Parent (Def_Id))) then
Set_Has_Completion (Def_Id);
Set_Is_Constructor (Def_Id);
else
Error_Pragma_Arg
("non-default constructors not implemented", Arg1);
end if;
else
Error_Pragma_Arg
("pragma% requires function returning a 'C'P'P_Class type",
Arg1);
end if;
end CPP_Constructor;
-----------------
-- CPP_Virtual --
-----------------
-- pragma CPP_Virtual
-- [Entity =>] LOCAL_NAME
-- [ [Vtable_Ptr =>] LOCAL_NAME,
-- [Position =>] static_integer_EXPRESSION]);
when Pragma_CPP_Virtual => CPP_Virtual : declare
Arg : Node_Id;
Typ : Entity_Id;
Subp : Entity_Id;
VTP_Type : constant Entity_Id := RTE (RE_Vtable_Ptr);
DTC : Entity_Id;
V : Uint;
begin
GNAT_Pragma;
Check_Arg_Order ((Name_Entity, Name_Vtable_Ptr, Name_Position));
if Arg_Count = 3 then
Check_Optional_Identifier (Arg2, Name_Vtable_Ptr);
-- We allow Entry_Count as well as Position for the third
-- parameter for back compatibility with versions of GNAT
-- before version 3.12. The documentation has always said
-- Position, but the code up to 3.12 said Entry_Count.
if Chars (Arg3) /= Name_Entry_Count then
Check_Optional_Identifier (Arg3, Name_Position);
end if;
else
Check_Arg_Count (1);
end if;
Check_Optional_Identifier (Arg1, Name_Entity);
Check_Arg_Is_Local_Name (Arg1);
-- First argument must be a subprogram name
Arg := Expression (Arg1);
Find_Program_Unit_Name (Arg);
if Etype (Arg) = Any_Type then
return;
else
Subp := Entity (Arg);
end if;
if not (Is_Subprogram (Subp)
and then Is_Dispatching_Operation (Subp))
then
Error_Pragma_Arg
("pragma% must reference a primitive operation", Arg1);
end if;
Typ := Find_Dispatching_Type (Subp);
-- If only one Argument defaults are :
-- . DTC_Entity is the default Vtable pointer
-- . DT_Position will be set at the freezing point
if Arg_Count = 1 then
Set_DTC_Entity (Subp, First_Tag_Component (Typ));
return;
end if;
-- Second argument is a component name of type Vtable_Ptr
Arg := Expression (Arg2);
if Nkind (Arg) /= N_Identifier then
Error_Msg_NE ("must be a& component name", Arg, Typ);
raise Pragma_Exit;
end if;
DTC := First_Component (Typ);
while Present (DTC) and then Chars (DTC) /= Chars (Arg) loop
Next_Component (DTC);
end loop;
-- Case of tagged type with no user-defined vtable ptr
if No (DTC) then
Error_Msg_NE ("must be a& component name", Arg, Typ);
raise Pragma_Exit;
elsif Etype (DTC) /= VTP_Type then
Wrong_Type (Arg, VTP_Type);
return;
end if;
-- Third argument is an integer (DT_Position)
Arg := Expression (Arg3);
Analyze_And_Resolve (Arg, Any_Integer);
if not Is_Static_Expression (Arg) then
Flag_Non_Static_Expr
("third argument of pragma CPP_Virtual must be static!",
Arg3);
raise Pragma_Exit;
else
V := Expr_Value (Expression (Arg3));
if V <= 0 then
Error_Pragma_Arg
("third argument of pragma% must be positive",
Arg3);
else
Set_DTC_Entity (Subp, DTC);
Set_DT_Position (Subp, V);
end if;
end if;
end CPP_Virtual;
----------------
-- CPP_Vtable --
----------------
-- pragma CPP_Vtable (
-- [Entity =>] LOCAL_NAME
-- [Vtable_Ptr =>] LOCAL_NAME,
-- [Entry_Count =>] static_integer_EXPRESSION);
when Pragma_CPP_Vtable => CPP_Vtable : declare
Arg : Node_Id;
Typ : Entity_Id;
VTP_Type : constant Entity_Id := RTE (RE_Vtable_Ptr);
DTC : Entity_Id;
V : Uint;
Elmt : Elmt_Id;
begin
GNAT_Pragma;
Check_Arg_Order ((Name_Entity, Name_Vtable_Ptr, Name_Entry_Count));
Check_Arg_Count (3);
Check_Optional_Identifier (Arg1, Name_Entity);
Check_Optional_Identifier (Arg2, Name_Vtable_Ptr);
Check_Optional_Identifier (Arg3, Name_Entry_Count);
Check_Arg_Is_Local_Name (Arg1);
-- First argument is a record type name
Arg := Expression (Arg1);
Analyze (Arg);
if Etype (Arg) = Any_Type then
return;
else
Typ := Entity (Arg);
end if;
if not (Is_Tagged_Type (Typ) and then Is_CPP_Class (Typ)) then
Error_Pragma_Arg ("'C'P'P_Class tagged type expected", Arg1);
end if;
-- Second argument is a component name of type Vtable_Ptr
Arg := Expression (Arg2);
if Nkind (Arg) /= N_Identifier then
Error_Msg_NE ("must be a& component name", Arg, Typ);
raise Pragma_Exit;
end if;
DTC := First_Component (Typ);
while Present (DTC) and then Chars (DTC) /= Chars (Arg) loop
Next_Component (DTC);
end loop;
if No (DTC) then
Error_Msg_NE ("must be a& component name", Arg, Typ);
raise Pragma_Exit;
elsif Etype (DTC) /= VTP_Type then
Wrong_Type (DTC, VTP_Type);
return;
-- If it is the first pragma Vtable, This becomes the default tag
elsif (not Is_Tag (DTC))
and then DT_Entry_Count (First_Tag_Component (Typ)) = No_Uint
then
Set_Is_Tag (First_Tag_Component (Typ), False);
Set_Is_Tag (DTC, True);
Set_DT_Entry_Count (DTC, No_Uint);
end if;
-- Those pragmas must appear before any primitive operation
-- definition (except inherited ones) otherwise the default
-- may be wrong
Elmt := First_Elmt (Primitive_Operations (Typ));
while Present (Elmt) loop
if No (Alias (Node (Elmt))) then
Error_Msg_Sloc := Sloc (Node (Elmt));
Error_Pragma
("pragma% must appear before this primitive operation");
end if;
Next_Elmt (Elmt);
end loop;
-- Third argument is an integer (DT_Entry_Count)
Arg := Expression (Arg3);
Analyze_And_Resolve (Arg, Any_Integer);
if not Is_Static_Expression (Arg) then
Flag_Non_Static_Expr
("entry count for pragma CPP_Vtable must be a static " &
"expression!", Arg3);
raise Pragma_Exit;
else
V := Expr_Value (Expression (Arg3));
if V <= 0 then
Error_Pragma_Arg
("entry count for pragma% must be positive", Arg3);
else
Set_DT_Entry_Count (DTC, V);
end if;
end if;
end CPP_Vtable;
-----------
-- Debug --
-----------
-- pragma Debug ([boolean_EXPRESSION,] PROCEDURE_CALL_STATEMENT);
when Pragma_Debug => Debug : declare
Cond : Node_Id;
begin
GNAT_Pragma;
Cond :=
New_Occurrence_Of
(Boolean_Literals (Debug_Pragmas_Enabled and Expander_Active),
Loc);
if Arg_Count = 2 then
Cond :=
Make_And_Then (Loc,
Left_Opnd => Relocate_Node (Cond),
Right_Opnd => Expression (Arg1));
end if;
-- Rewrite into a conditional with an appropriate condition. We
-- wrap the procedure call in a block so that overhead from e.g.
-- use of the secondary stack does not generate execution overhead
-- for suppressed conditions.
Rewrite (N, Make_Implicit_If_Statement (N,
Condition => Cond,
Then_Statements => New_List (
Make_Block_Statement (Loc,
Handled_Statement_Sequence =>
Make_Handled_Sequence_Of_Statements (Loc,
Statements => New_List (
Relocate_Node (Debug_Statement (N))))))));
Analyze (N);
end Debug;
------------------
-- Debug_Policy --
------------------
-- pragma Debug_Policy (Check | Ignore)
when Pragma_Debug_Policy =>
GNAT_Pragma;
Check_Arg_Count (1);
Check_Arg_Is_One_Of (Arg1, Name_Check, Name_Ignore);
Debug_Pragmas_Enabled := Chars (Expression (Arg1)) = Name_Check;
---------------------
-- Detect_Blocking --
---------------------
-- pragma Detect_Blocking;
when Pragma_Detect_Blocking =>
GNAT_Pragma;
Check_Arg_Count (0);
Check_Valid_Configuration_Pragma;
Detect_Blocking := True;
-------------------
-- Discard_Names --
-------------------
-- pragma Discard_Names [([On =>] LOCAL_NAME)];
when Pragma_Discard_Names => Discard_Names : declare
E_Id : Entity_Id;
E : Entity_Id;
begin
Check_Ada_83_Warning;
-- Deal with configuration pragma case
if Arg_Count = 0 and then Is_Configuration_Pragma then
Global_Discard_Names := True;
return;
-- Otherwise, check correct appropriate context
else
Check_Is_In_Decl_Part_Or_Package_Spec;
if Arg_Count = 0 then
-- If there is no parameter, then from now on this pragma
-- applies to any enumeration, exception or tagged type
-- defined in the current declarative part.
Set_Discard_Names (Current_Scope);
return;
else
Check_Arg_Count (1);
Check_Optional_Identifier (Arg1, Name_On);
Check_Arg_Is_Local_Name (Arg1);
E_Id := Expression (Arg1);
if Etype (E_Id) = Any_Type then
return;
else
E := Entity (E_Id);
end if;
if (Is_First_Subtype (E)
and then (Is_Enumeration_Type (E)
or else Is_Tagged_Type (E)))
or else Ekind (E) = E_Exception
then
Set_Discard_Names (E);
else
Error_Pragma_Arg
("inappropriate entity for pragma%", Arg1);
end if;
end if;
end if;
end Discard_Names;
---------------
-- Elaborate --
---------------
-- pragma Elaborate (library_unit_NAME {, library_unit_NAME});
when Pragma_Elaborate => Elaborate : declare
Plist : List_Id;
Parent_Node : Node_Id;
Arg : Node_Id;
Citem : Node_Id;
begin
-- Pragma must be in context items list of a compilation unit
if not Is_List_Member (N) then
Pragma_Misplaced;
return;
else
Plist := List_Containing (N);
Parent_Node := Parent (Plist);
if Parent_Node = Empty
or else Nkind (Parent_Node) /= N_Compilation_Unit
or else Context_Items (Parent_Node) /= Plist
then
Pragma_Misplaced;
return;
end if;
end if;
-- Must be at least one argument
if Arg_Count = 0 then
Error_Pragma ("pragma% requires at least one argument");
end if;
-- In Ada 83 mode, there can be no items following it in the
-- context list except other pragmas and implicit with clauses
-- (e.g. those added by use of Rtsfind). In Ada 95 mode, this
-- placement rule does not apply.
if Ada_Version = Ada_83 and then Comes_From_Source (N) then
Citem := Next (N);
while Present (Citem) loop
if Nkind (Citem) = N_Pragma
or else (Nkind (Citem) = N_With_Clause
and then Implicit_With (Citem))
then
null;
else
Error_Pragma
("(Ada 83) pragma% must be at end of context clause");
end if;
Next (Citem);
end loop;
end if;
-- Finally, the arguments must all be units mentioned in a with
-- clause in the same context clause. Note we already checked
-- (in Par.Prag) that the arguments are either identifiers or
Arg := Arg1;
Outer : while Present (Arg) loop
Citem := First (Plist);
Inner : while Citem /= N loop
if Nkind (Citem) = N_With_Clause
and then Same_Name (Name (Citem), Expression (Arg))
then
Set_Elaborate_Present (Citem, True);
Set_Unit_Name (Expression (Arg), Name (Citem));
-- With the pragma present, elaboration calls on
-- subprograms from the named unit need no further
-- checks, as long as the pragma appears in the current
-- compilation unit. If the pragma appears in some unit
-- in the context, there might still be a need for an
-- Elaborate_All_Desirable from the current compilation
-- to the the named unit, so we keep the check enabled.
if In_Extended_Main_Source_Unit (N) then
Set_Suppress_Elaboration_Warnings
(Entity (Name (Citem)));
end if;
exit Inner;
end if;
Next (Citem);
end loop Inner;
if Citem = N then
Error_Pragma_Arg
("argument of pragma% is not with'ed unit", Arg);
end if;
Next (Arg);
end loop Outer;
-- Give a warning if operating in static mode with -gnatwl
-- (elaboration warnings eanbled) switch set.
if Elab_Warnings and not Dynamic_Elaboration_Checks then
Error_Msg_N
("?use of pragma Elaborate may not be safe", N);
Error_Msg_N
("?use pragma Elaborate_All instead if possible", N);
end if;
end Elaborate;
-------------------
-- Elaborate_All --
-------------------
-- pragma Elaborate_All (library_unit_NAME {, library_unit_NAME});
when Pragma_Elaborate_All => Elaborate_All : declare
Plist : List_Id;
Parent_Node : Node_Id;
Arg : Node_Id;
Citem : Node_Id;
begin
Check_Ada_83_Warning;
-- Pragma must be in context items list of a compilation unit
if not Is_List_Member (N) then
Pragma_Misplaced;
return;
else
Plist := List_Containing (N);
Parent_Node := Parent (Plist);
if Parent_Node = Empty
or else Nkind (Parent_Node) /= N_Compilation_Unit
or else Context_Items (Parent_Node) /= Plist
then
Pragma_Misplaced;
return;
end if;
end if;
-- Must be at least one argument
if Arg_Count = 0 then
Error_Pragma ("pragma% requires at least one argument");
end if;
-- Note: unlike pragma Elaborate, pragma Elaborate_All does not
-- have to appear at the end of the context clause, but may
-- appear mixed in with other items, even in Ada 83 mode.
-- Final check: the arguments must all be units mentioned in
-- a with clause in the same context clause. Note that we
-- already checked (in Par.Prag) that all the arguments are
-- either identifiers or selected components.
Arg := Arg1;
Outr : while Present (Arg) loop
Citem := First (Plist);
Innr : while Citem /= N loop
if Nkind (Citem) = N_With_Clause
and then Same_Name (Name (Citem), Expression (Arg))
then
Set_Elaborate_All_Present (Citem, True);
Set_Unit_Name (Expression (Arg), Name (Citem));
-- Suppress warnings and elaboration checks on the named
-- unit if the pragma is in the current compilation, as
-- for pragma Elaborate.
if In_Extended_Main_Source_Unit (N) then
Set_Suppress_Elaboration_Warnings
(Entity (Name (Citem)));
end if;
exit Innr;
end if;
Next (Citem);
end loop Innr;
if Citem = N then
Set_Error_Posted (N);
Error_Pragma_Arg
("argument of pragma% is not with'ed unit", Arg);
end if;
Next (Arg);
end loop Outr;
end Elaborate_All;
--------------------
-- Elaborate_Body --
--------------------
-- pragma Elaborate_Body [( library_unit_NAME )];
when Pragma_Elaborate_Body => Elaborate_Body : declare
Cunit_Node : Node_Id;
Cunit_Ent : Entity_Id;
begin
Check_Ada_83_Warning;
Check_Valid_Library_Unit_Pragma;
if Nkind (N) = N_Null_Statement then
return;
end if;
Cunit_Node := Cunit (Current_Sem_Unit);
Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
if Nkind (Unit (Cunit_Node)) = N_Package_Body
or else
Nkind (Unit (Cunit_Node)) = N_Subprogram_Body
then
Error_Pragma ("pragma% must refer to a spec, not a body");
else
Set_Body_Required (Cunit_Node, True);
Set_Has_Pragma_Elaborate_Body (Cunit_Ent);
-- If we are in dynamic elaboration mode, then we suppress
-- elaboration warnings for the unit, since it is definitely
-- fine NOT to do dynamic checks at the first level (and such
-- checks will be suppressed because no elaboration boolean
-- is created for Elaborate_Body packages).
-- But in the static model of elaboration, Elaborate_Body is
-- definitely NOT good enough to ensure elaboration safety on
-- its own, since the body may WITH other units that are not
-- safe from an elaboration point of view, so a client must
-- still do an Elaborate_All on such units.
-- Debug flag -gnatdD restores the old behavior of 3.13,
-- where Elaborate_Body always suppressed elab warnings.
if Dynamic_Elaboration_Checks or Debug_Flag_DD then
Set_Suppress_Elaboration_Warnings (Cunit_Ent);
end if;
end if;
end Elaborate_Body;
------------------------
-- Elaboration_Checks --
------------------------
-- pragma Elaboration_Checks (Static | Dynamic);
when Pragma_Elaboration_Checks =>
GNAT_Pragma;
Check_Arg_Count (1);
Check_Arg_Is_One_Of (Arg1, Name_Static, Name_Dynamic);
Dynamic_Elaboration_Checks :=
(Chars (Get_Pragma_Arg (Arg1)) = Name_Dynamic);
---------------
-- Eliminate --
---------------
-- pragma Eliminate (
-- [Unit_Name =>] IDENTIFIER |
-- SELECTED_COMPONENT
-- [,[Entity =>] IDENTIFIER |
-- SELECTED_COMPONENT |
-- STRING_LITERAL]
-- [,]OVERLOADING_RESOLUTION);
-- OVERLOADING_RESOLUTION ::= PARAMETER_AND_RESULT_TYPE_PROFILE |
-- SOURCE_LOCATION
-- PARAMETER_AND_RESULT_TYPE_PROFILE ::= PROCEDURE_PROFILE |
-- FUNCTION_PROFILE
-- PROCEDURE_PROFILE ::= Parameter_Types => PARAMETER_TYPES
-- FUNCTION_PROFILE ::= [Parameter_Types => PARAMETER_TYPES,]
-- Result_Type => result_SUBTYPE_NAME]
-- PARAMETER_TYPES ::= (SUBTYPE_NAME {, SUBTYPE_NAME})
-- SUBTYPE_NAME ::= STRING_LITERAL
-- SOURCE_LOCATION ::= Source_Location => SOURCE_TRACE
-- SOURCE_TRACE ::= STRING_LITERAL
when Pragma_Eliminate => Eliminate : declare
Args : Args_List (1 .. 5);
Names : constant Name_List (1 .. 5) := (
Name_Unit_Name,
Name_Entity,
Name_Parameter_Types,
Name_Result_Type,
Name_Source_Location);
Unit_Name : Node_Id renames Args (1);
Entity : Node_Id renames Args (2);
Parameter_Types : Node_Id renames Args (3);
Result_Type : Node_Id renames Args (4);
Source_Location : Node_Id renames Args (5);
begin
GNAT_Pragma;
Check_Valid_Configuration_Pragma;
Gather_Associations (Names, Args);
if No (Unit_Name) then
Error_Pragma ("missing Unit_Name argument for pragma%");
end if;
if No (Entity)
and then (Present (Parameter_Types)
or else
Present (Result_Type)
or else
Present (Source_Location))
then
Error_Pragma ("missing Entity argument for pragma%");
end if;
if (Present (Parameter_Types)
or else
Present (Result_Type))
and then
Present (Source_Location)
then
Error_Pragma
("parameter profile and source location cannot " &
"be used together in pragma%");
end if;
Process_Eliminate_Pragma
(N,
Unit_Name,
Entity,
Parameter_Types,
Result_Type,
Source_Location);
end Eliminate;
-------------------------
-- Explicit_Overriding --
-------------------------
when Pragma_Explicit_Overriding =>
Check_Valid_Configuration_Pragma;
Check_Arg_Count (0);
Explicit_Overriding := True;
------------
-- Export --
------------
-- pragma Export (
-- [ Convention =>] convention_IDENTIFIER,
-- [ Entity =>] local_NAME
-- [, [External_Name =>] static_string_EXPRESSION ]
-- [, [Link_Name =>] static_string_EXPRESSION ]);
when Pragma_Export => Export : declare
C : Convention_Id;
Def_Id : Entity_Id;
begin
Check_Ada_83_Warning;
Check_Arg_Order
((Name_Convention,
Name_Entity,
Name_External_Name,
Name_Link_Name));
Check_At_Least_N_Arguments (2);
Check_At_Most_N_Arguments (4);
Process_Convention (C, Def_Id);
if Ekind (Def_Id) /= E_Constant then
Note_Possible_Modification (Expression (Arg2));
end if;
Process_Interface_Name (Def_Id, Arg3, Arg4);
Set_Exported (Def_Id, Arg2);
end Export;
----------------------
-- Export_Exception --
----------------------
-- pragma Export_Exception (
-- [Internal =>] LOCAL_NAME,
-- [, [External =>] EXTERNAL_SYMBOL,]
-- [, [Form =>] Ada | VMS]
-- [, [Code =>] static_integer_EXPRESSION]);
when Pragma_Export_Exception => Export_Exception : declare
Args : Args_List (1 .. 4);
Names : constant Name_List (1 .. 4) := (
Name_Internal,
Name_External,
Name_Form,
Name_Code);
Internal : Node_Id renames Args (1);
External : Node_Id renames Args (2);
Form : Node_Id renames Args (3);
Code : Node_Id renames Args (4);
begin
if Inside_A_Generic then
Error_Pragma ("pragma% cannot be used for generic entities");
end if;
Gather_Associations (Names, Args);
Process_Extended_Import_Export_Exception_Pragma (
Arg_Internal => Internal,
Arg_External => External,
Arg_Form => Form,
Arg_Code => Code);
if not Is_VMS_Exception (Entity (Internal)) then
Set_Exported (Entity (Internal), Internal);
end if;
end Export_Exception;
---------------------
-- Export_Function --
---------------------
-- pragma Export_Function (
-- [Internal =>] LOCAL_NAME,
-- [, [External =>] EXTERNAL_SYMBOL,]
-- [, [Parameter_Types =>] (PARAMETER_TYPES)]
-- [, [Result_Type =>] TYPE_DESIGNATOR]
-- [, [Mechanism =>] MECHANISM]
-- [, [Result_Mechanism =>] MECHANISM_NAME]);
-- EXTERNAL_SYMBOL ::=
-- IDENTIFIER
-- | static_string_EXPRESSION
-- PARAMETER_TYPES ::=
-- null
-- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
-- TYPE_DESIGNATOR ::=
-- subtype_NAME
-- | subtype_Name ' Access
-- MECHANISM ::=
-- MECHANISM_NAME
-- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
-- MECHANISM_ASSOCIATION ::=
-- [formal_parameter_NAME =>] MECHANISM_NAME
-- MECHANISM_NAME ::=
-- Value
-- | Reference
-- | Descriptor [([Class =>] CLASS_NAME)]
-- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
when Pragma_Export_Function => Export_Function : declare
Args : Args_List (1 .. 6);
Names : constant Name_List (1 .. 6) := (
Name_Internal,
Name_External,
Name_Parameter_Types,
Name_Result_Type,
Name_Mechanism,
Name_Result_Mechanism);
Internal : Node_Id renames Args (1);
External : Node_Id renames Args (2);
Parameter_Types : Node_Id renames Args (3);
Result_Type : Node_Id renames Args (4);
Mechanism : Node_Id renames Args (5);
Result_Mechanism : Node_Id renames Args (6);
begin
GNAT_Pragma;
Gather_Associations (Names, Args);
Process_Extended_Import_Export_Subprogram_Pragma (
Arg_Internal => Internal,
Arg_External => External,
Arg_Parameter_Types => Parameter_Types,
Arg_Result_Type => Result_Type,
Arg_Mechanism => Mechanism,
Arg_Result_Mechanism => Result_Mechanism);
end Export_Function;
-------------------
-- Export_Object --
-------------------
-- pragma Export_Object (
-- [Internal =>] LOCAL_NAME,
-- [, [External =>] EXTERNAL_SYMBOL]
-- [, [Size =>] EXTERNAL_SYMBOL]);
-- EXTERNAL_SYMBOL ::=
-- IDENTIFIER
-- | static_string_EXPRESSION
-- PARAMETER_TYPES ::=
-- null
-- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
-- TYPE_DESIGNATOR ::=
-- subtype_NAME
-- | subtype_Name ' Access
-- MECHANISM ::=
-- MECHANISM_NAME
-- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
-- MECHANISM_ASSOCIATION ::=
-- [formal_parameter_NAME =>] MECHANISM_NAME
-- MECHANISM_NAME ::=
-- Value
-- | Reference
-- | Descriptor [([Class =>] CLASS_NAME)]
-- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
when Pragma_Export_Object => Export_Object : declare
Args : Args_List (1 .. 3);
Names : constant Name_List (1 .. 3) := (
Name_Internal,
Name_External,
Name_Size);
Internal : Node_Id renames Args (1);
External : Node_Id renames Args (2);
Size : Node_Id renames Args (3);
begin
GNAT_Pragma;
Gather_Associations (Names, Args);
Process_Extended_Import_Export_Object_Pragma (
Arg_Internal => Internal,
Arg_External => External,
Arg_Size => Size);
end Export_Object;
----------------------
-- Export_Procedure --
----------------------
-- pragma Export_Procedure (
-- [Internal =>] LOCAL_NAME,
-- [, [External =>] EXTERNAL_SYMBOL,]
-- [, [Parameter_Types =>] (PARAMETER_TYPES)]
-- [, [Mechanism =>] MECHANISM]);
-- EXTERNAL_SYMBOL ::=
-- IDENTIFIER
-- | static_string_EXPRESSION
-- PARAMETER_TYPES ::=
-- null
-- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
-- TYPE_DESIGNATOR ::=
-- subtype_NAME
-- | subtype_Name ' Access
-- MECHANISM ::=
-- MECHANISM_NAME
-- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
-- MECHANISM_ASSOCIATION ::=
-- [formal_parameter_NAME =>] MECHANISM_NAME
-- MECHANISM_NAME ::=
-- Value
-- | Reference
-- | Descriptor [([Class =>] CLASS_NAME)]
-- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
when Pragma_Export_Procedure => Export_Procedure : declare
Args : Args_List (1 .. 4);
Names : constant Name_List (1 .. 4) := (
Name_Internal,
Name_External,
Name_Parameter_Types,
Name_Mechanism);
Internal : Node_Id renames Args (1);
External : Node_Id renames Args (2);
Parameter_Types : Node_Id renames Args (3);
Mechanism : Node_Id renames Args (4);
begin
GNAT_Pragma;
Gather_Associations (Names, Args);
Process_Extended_Import_Export_Subprogram_Pragma (
Arg_Internal => Internal,
Arg_External => External,
Arg_Parameter_Types => Parameter_Types,
Arg_Mechanism => Mechanism);
end Export_Procedure;
------------------
-- Export_Value --
------------------
-- pragma Export_Value (
-- [Value =>] static_integer_EXPRESSION,
-- [Link_Name =>] static_string_EXPRESSION);
when Pragma_Export_Value =>
GNAT_Pragma;
Check_Arg_Order ((Name_Value, Name_Link_Name));
Check_Arg_Count (2);
Check_Optional_Identifier (Arg1, Name_Value);
Check_Arg_Is_Static_Expression (Arg1, Any_Integer);
Check_Optional_Identifier (Arg2, Name_Link_Name);
Check_Arg_Is_Static_Expression (Arg2, Standard_String);
-----------------------------
-- Export_Valued_Procedure --
-----------------------------
-- pragma Export_Valued_Procedure (
-- [Internal =>] LOCAL_NAME,
-- [, [External =>] EXTERNAL_SYMBOL,]
-- [, [Parameter_Types =>] (PARAMETER_TYPES)]
-- [, [Mechanism =>] MECHANISM]);
-- EXTERNAL_SYMBOL ::=
-- IDENTIFIER
-- | static_string_EXPRESSION
-- PARAMETER_TYPES ::=
-- null
-- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
-- TYPE_DESIGNATOR ::=
-- subtype_NAME
-- | subtype_Name ' Access
-- MECHANISM ::=
-- MECHANISM_NAME
-- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
-- MECHANISM_ASSOCIATION ::=
-- [formal_parameter_NAME =>] MECHANISM_NAME
-- MECHANISM_NAME ::=
-- Value
-- | Reference
-- | Descriptor [([Class =>] CLASS_NAME)]
-- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
when Pragma_Export_Valued_Procedure =>
Export_Valued_Procedure : declare
Args : Args_List (1 .. 4);
Names : constant Name_List (1 .. 4) := (
Name_Internal,
Name_External,
Name_Parameter_Types,
Name_Mechanism);
Internal : Node_Id renames Args (1);
External : Node_Id renames Args (2);
Parameter_Types : Node_Id renames Args (3);
Mechanism : Node_Id renames Args (4);
begin
GNAT_Pragma;
Gather_Associations (Names, Args);
Process_Extended_Import_Export_Subprogram_Pragma (
Arg_Internal => Internal,
Arg_External => External,
Arg_Parameter_Types => Parameter_Types,
Arg_Mechanism => Mechanism);
end Export_Valued_Procedure;
-------------------
-- Extend_System --
-------------------
-- pragma Extend_System ([Name =>] Identifier);
when Pragma_Extend_System => Extend_System : declare
begin
GNAT_Pragma;
Check_Valid_Configuration_Pragma;
Check_Arg_Count (1);
Check_Optional_Identifier (Arg1, Name_Name);
Check_Arg_Is_Identifier (Arg1);
Get_Name_String (Chars (Expression (Arg1)));
if Name_Len > 4
and then Name_Buffer (1 .. 4) = "aux_"
then
if Present (System_Extend_Pragma_Arg) then
if Chars (Expression (Arg1)) =
Chars (Expression (System_Extend_Pragma_Arg))
then
null;
else
Error_Msg_Sloc := Sloc (System_Extend_Pragma_Arg);
Error_Pragma ("pragma% conflicts with that at#");
end if;
else
System_Extend_Pragma_Arg := Arg1;
if not GNAT_Mode then
System_Extend_Unit := Arg1;
end if;
end if;
else
Error_Pragma ("incorrect name for pragma%, must be Aux_xxx");
end if;
end Extend_System;
------------------------
-- Extensions_Allowed --
------------------------
-- pragma Extensions_Allowed (ON | OFF);
when Pragma_Extensions_Allowed =>
GNAT_Pragma;
Check_Arg_Count (1);
Check_No_Identifiers;
Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
if Chars (Expression (Arg1)) = Name_On then
Extensions_Allowed := True;
Ada_Version := Ada_Version_Type'Last;
else
Extensions_Allowed := False;
Ada_Version := Ada_Version_Type'Min (Ada_Version, Ada_95);
end if;
Ada_Version_Explicit := Ada_Version;
--------------
-- External --
--------------
-- pragma External (
-- [ Convention =>] convention_IDENTIFIER,
-- [ Entity =>] local_NAME
-- [, [External_Name =>] static_string_EXPRESSION ]
-- [, [Link_Name =>] static_string_EXPRESSION ]);
when Pragma_External => External : declare
C : Convention_Id;
Def_Id : Entity_Id;
begin
GNAT_Pragma;
Check_Arg_Order
((Name_Convention,
Name_Entity,
Name_External_Name,
Name_Link_Name));
Check_At_Least_N_Arguments (2);
Check_At_Most_N_Arguments (4);
Process_Convention (C, Def_Id);
Note_Possible_Modification (Expression (Arg2));
Process_Interface_Name (Def_Id, Arg3, Arg4);
Set_Exported (Def_Id, Arg2);
end External;
--------------------------
-- External_Name_Casing --
--------------------------
-- pragma External_Name_Casing (
-- UPPERCASE | LOWERCASE
-- [, AS_IS | UPPERCASE | LOWERCASE]);
when Pragma_External_Name_Casing => External_Name_Casing : declare
begin
GNAT_Pragma;
Check_No_Identifiers;
if Arg_Count = 2 then
Check_Arg_Is_One_Of
(Arg2, Name_As_Is, Name_Uppercase, Name_Lowercase);
case Chars (Get_Pragma_Arg (Arg2)) is
when Name_As_Is =>
Opt.External_Name_Exp_Casing := As_Is;
when Name_Uppercase =>
Opt.External_Name_Exp_Casing := Uppercase;
when Name_Lowercase =>
Opt.External_Name_Exp_Casing := Lowercase;
when others =>
null;
end case;
else
Check_Arg_Count (1);
end if;
Check_Arg_Is_One_Of (Arg1, Name_Uppercase, Name_Lowercase);
case Chars (Get_Pragma_Arg (Arg1)) is
when Name_Uppercase =>
Opt.External_Name_Imp_Casing := Uppercase;
when Name_Lowercase =>
Opt.External_Name_Imp_Casing := Lowercase;
when others =>
null;
end case;
end External_Name_Casing;
---------------------------
-- Finalize_Storage_Only --
---------------------------
-- pragma Finalize_Storage_Only (first_subtype_LOCAL_NAME);
when Pragma_Finalize_Storage_Only => Finalize_Storage : declare
Assoc : constant Node_Id := Arg1;
Type_Id : constant Node_Id := Expression (Assoc);
Typ : Entity_Id;
begin
Check_No_Identifiers;
Check_Arg_Count (1);
Check_Arg_Is_Local_Name (Arg1);
Find_Type (Type_Id);
Typ := Entity (Type_Id);
if Typ = Any_Type
or else Rep_Item_Too_Early (Typ, N)
then
return;
else
Typ := Underlying_Type (Typ);
end if;
if not Is_Controlled (Typ) then
Error_Pragma ("pragma% must specify controlled type");
end if;
Check_First_Subtype (Arg1);
if Finalize_Storage_Only (Typ) then
Error_Pragma ("duplicate pragma%, only one allowed");
elsif not Rep_Item_Too_Late (Typ, N) then
Set_Finalize_Storage_Only (Base_Type (Typ), True);
end if;
end Finalize_Storage;
--------------------------
-- Float_Representation --
--------------------------
-- pragma Float_Representation (FLOAT_REP[, float_type_LOCAL_NAME]);
-- FLOAT_REP ::= VAX_Float | IEEE_Float
when Pragma_Float_Representation => Float_Representation : declare
Argx : Node_Id;
Digs : Nat;
Ent : Entity_Id;
begin
GNAT_Pragma;
if Arg_Count = 1 then
Check_Valid_Configuration_Pragma;
else
Check_Arg_Count (2);
Check_Optional_Identifier (Arg2, Name_Entity);
Check_Arg_Is_Local_Name (Arg2);
end if;
Check_No_Identifier (Arg1);
Check_Arg_Is_One_Of (Arg1, Name_VAX_Float, Name_IEEE_Float);
if not OpenVMS_On_Target then
if Chars (Expression (Arg1)) = Name_VAX_Float then
Error_Pragma
("?pragma% ignored (applies only to Open'V'M'S)");
end if;
return;
end if;
-- One argument case
if Arg_Count = 1 then
if Chars (Expression (Arg1)) = Name_VAX_Float then
if Opt.Float_Format = 'I' then
Error_Pragma ("'I'E'E'E format previously specified");
end if;
Opt.Float_Format := 'V';
else
if Opt.Float_Format = 'V' then
Error_Pragma ("'V'A'X format previously specified");
end if;
Opt.Float_Format := 'I';
end if;
Set_Standard_Fpt_Formats;
-- Two argument case
else
Argx := Get_Pragma_Arg (Arg2);
if not Is_Entity_Name (Argx)
or else not Is_Floating_Point_Type (Entity (Argx))
then
Error_Pragma_Arg
("second argument of% pragma must be floating-point type",
Arg2);
end if;
Ent := Entity (Argx);
Digs := UI_To_Int (Digits_Value (Ent));
-- Two arguments, VAX_Float case
if Chars (Expression (Arg1)) = Name_VAX_Float then
case Digs is
when 6 => Set_F_Float (Ent);
when 9 => Set_D_Float (Ent);
when 15 => Set_G_Float (Ent);
when others =>
Error_Pragma_Arg
("wrong digits value, must be 6,9 or 15", Arg2);
end case;
-- Two arguments, IEEE_Float case
else
case Digs is
when 6 => Set_IEEE_Short (Ent);
when 15 => Set_IEEE_Long (Ent);
when others =>
Error_Pragma_Arg
("wrong digits value, must be 6 or 15", Arg2);
end case;
end if;
end if;
end Float_Representation;
-----------
-- Ident --
-----------
-- pragma Ident (static_string_EXPRESSION)
-- Note: pragma Comment shares this processing. Pragma Comment
-- is identical to Ident, except that the restriction of the
-- argument to 31 characters and the placement restrictions
-- are not enforced for pragma Comment.
when Pragma_Ident | Pragma_Comment => Ident : declare
Str : Node_Id;
begin
GNAT_Pragma;
Check_Arg_Count (1);
Check_No_Identifiers;
Check_Arg_Is_Static_Expression (Arg1, Standard_String);
-- For pragma Ident, preserve DEC compatibility by requiring
-- the pragma to appear in a declarative part or package spec.
if Prag_Id = Pragma_Ident then
Check_Is_In_Decl_Part_Or_Package_Spec;
end if;
Str := Expr_Value_S (Expression (Arg1));
declare
CS : Node_Id;
GP : Node_Id;
begin
GP := Parent (Parent (N));
if Nkind (GP) = N_Package_Declaration
or else
Nkind (GP) = N_Generic_Package_Declaration
then
GP := Parent (GP);
end if;
-- If we have a compilation unit, then record the ident
-- value, checking for improper duplication.
if Nkind (GP) = N_Compilation_Unit then
CS := Ident_String (Current_Sem_Unit);
if Present (CS) then
-- For Ident, we do not permit multiple instances
if Prag_Id = Pragma_Ident then
Error_Pragma ("duplicate% pragma not permitted");
-- For Comment, we concatenate the string, unless we
-- want to preserve the tree structure for ASIS.
elsif not ASIS_Mode then
Start_String (Strval (CS));
Store_String_Char (' ');
Store_String_Chars (Strval (Str));
Set_Strval (CS, End_String);
end if;
else
-- In VMS, the effect of IDENT is achieved by passing
-- IDENTIFICATION=name as a --for-linker switch.
if OpenVMS_On_Target then
Start_String;
Store_String_Chars
("--for-linker=IDENTIFICATION=");
String_To_Name_Buffer (Strval (Str));
Store_String_Chars (Name_Buffer (1 .. Name_Len));
-- Only the last processed IDENT is saved. The main
-- purpose is so an IDENT associated with a main
-- procedure will be used in preference to an IDENT
-- associated with a with'd package.
Replace_Linker_Option_String
(End_String, "--for-linker=IDENTIFICATION=");
end if;
Set_Ident_String (Current_Sem_Unit, Str);
end if;
-- For subunits, we just ignore the Ident, since in GNAT
-- these are not separate object files, and hence not
-- separate units in the unit table.
elsif Nkind (GP) = N_Subunit then
null;
-- Otherwise we have a misplaced pragma Ident, but we ignore
-- this if we are in an instantiation, since it comes from
-- a generic, and has no relevance to the instantiation.
elsif Prag_Id = Pragma_Ident then
if Instantiation_Location (Loc) = No_Location then
Error_Pragma ("pragma% only allowed at outer level");
end if;
end if;
end;
end Ident;
------------
-- Import --
------------
-- pragma Import (
-- [ Convention =>] convention_IDENTIFIER,
-- [ Entity =>] local_NAME
-- [, [External_Name =>] static_string_EXPRESSION ]
-- [, [Link_Name =>] static_string_EXPRESSION ]);
when Pragma_Import =>
Check_Ada_83_Warning;
Check_Arg_Order
((Name_Convention,
Name_Entity,
Name_External_Name,
Name_Link_Name));
Check_At_Least_N_Arguments (2);
Check_At_Most_N_Arguments (4);
Process_Import_Or_Interface;
----------------------
-- Import_Exception --
----------------------
-- pragma Import_Exception (
-- [Internal =>] LOCAL_NAME,
-- [, [External =>] EXTERNAL_SYMBOL,]
-- [, [Form =>] Ada | VMS]
-- [, [Code =>] static_integer_EXPRESSION]);
when Pragma_Import_Exception => Import_Exception : declare
Args : Args_List (1 .. 4);
Names : constant Name_List (1 .. 4) := (
Name_Internal,
Name_External,
Name_Form,
Name_Code);
Internal : Node_Id renames Args (1);
External : Node_Id renames Args (2);
Form : Node_Id renames Args (3);
Code : Node_Id renames Args (4);
begin
Gather_Associations (Names, Args);
if Present (External) and then Present (Code) then
Error_Pragma
("cannot give both External and Code options for pragma%");
end if;
Process_Extended_Import_Export_Exception_Pragma (
Arg_Internal => Internal,
Arg_External => External,
Arg_Form => Form,
Arg_Code => Code);
if not Is_VMS_Exception (Entity (Internal)) then
Set_Imported (Entity (Internal));
end if;
end Import_Exception;
---------------------
-- Import_Function --
---------------------
-- pragma Import_Function (
-- [Internal =>] LOCAL_NAME,
-- [, [External =>] EXTERNAL_SYMBOL]
-- [, [Parameter_Types =>] (PARAMETER_TYPES)]
-- [, [Result_Type =>] SUBTYPE_MARK]
-- [, [Mechanism =>] MECHANISM]
-- [, [Result_Mechanism =>] MECHANISM_NAME]
-- [, [First_Optional_Parameter =>] IDENTIFIER]);
-- EXTERNAL_SYMBOL ::=
-- IDENTIFIER
-- | static_string_EXPRESSION
-- PARAMETER_TYPES ::=
-- null
-- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
-- TYPE_DESIGNATOR ::=
-- subtype_NAME
-- | subtype_Name ' Access
-- MECHANISM ::=
-- MECHANISM_NAME
-- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
-- MECHANISM_ASSOCIATION ::=
-- [formal_parameter_NAME =>] MECHANISM_NAME
-- MECHANISM_NAME ::=
-- Value
-- | Reference
-- | Descriptor [([Class =>] CLASS_NAME)]
-- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
when Pragma_Import_Function => Import_Function : declare
Args : Args_List (1 .. 7);
Names : constant Name_List (1 .. 7) := (
Name_Internal,
Name_External,
Name_Parameter_Types,
Name_Result_Type,
Name_Mechanism,
Name_Result_Mechanism,
Name_First_Optional_Parameter);
Internal : Node_Id renames Args (1);
External : Node_Id renames Args (2);
Parameter_Types : Node_Id renames Args (3);
Result_Type : Node_Id renames Args (4);
Mechanism : Node_Id renames Args (5);
Result_Mechanism : Node_Id renames Args (6);
First_Optional_Parameter : Node_Id renames Args (7);
begin
GNAT_Pragma;
Gather_Associations (Names, Args);
Process_Extended_Import_Export_Subprogram_Pragma (
Arg_Internal => Internal,
Arg_External => External,
Arg_Parameter_Types => Parameter_Types,
Arg_Result_Type => Result_Type,
Arg_Mechanism => Mechanism,
Arg_Result_Mechanism => Result_Mechanism,
Arg_First_Optional_Parameter => First_Optional_Parameter);
end Import_Function;
-------------------
-- Import_Object --
-------------------
-- pragma Import_Object (
-- [Internal =>] LOCAL_NAME,
-- [, [External =>] EXTERNAL_SYMBOL]
-- [, [Size =>] EXTERNAL_SYMBOL]);
-- EXTERNAL_SYMBOL ::=
-- IDENTIFIER
-- | static_string_EXPRESSION
when Pragma_Import_Object => Import_Object : declare
Args : Args_List (1 .. 3);
Names : constant Name_List (1 .. 3) := (
Name_Internal,
Name_External,
Name_Size);
Internal : Node_Id renames Args (1);
External : Node_Id renames Args (2);
Size : Node_Id renames Args (3);
begin
GNAT_Pragma;
Gather_Associations (Names, Args);
Process_Extended_Import_Export_Object_Pragma (
Arg_Internal => Internal,
Arg_External => External,
Arg_Size => Size);
end Import_Object;
----------------------
-- Import_Procedure --
----------------------
-- pragma Import_Procedure (
-- [Internal =>] LOCAL_NAME,
-- [, [External =>] EXTERNAL_SYMBOL]
-- [, [Parameter_Types =>] (PARAMETER_TYPES)]
-- [, [Mechanism =>] MECHANISM]
-- [, [First_Optional_Parameter =>] IDENTIFIER]);
-- EXTERNAL_SYMBOL ::=
-- IDENTIFIER
-- | static_string_EXPRESSION
-- PARAMETER_TYPES ::=
-- null
-- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
-- TYPE_DESIGNATOR ::=
-- subtype_NAME
-- | subtype_Name ' Access
-- MECHANISM ::=
-- MECHANISM_NAME
-- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
-- MECHANISM_ASSOCIATION ::=
-- [formal_parameter_NAME =>] MECHANISM_NAME
-- MECHANISM_NAME ::=
-- Value
-- | Reference
-- | Descriptor [([Class =>] CLASS_NAME)]
-- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
when Pragma_Import_Procedure => Import_Procedure : declare
Args : Args_List (1 .. 5);
Names : constant Name_List (1 .. 5) := (
Name_Internal,
Name_External,
Name_Parameter_Types,
Name_Mechanism,
Name_First_Optional_Parameter);
Internal : Node_Id renames Args (1);
External : Node_Id renames Args (2);
Parameter_Types : Node_Id renames Args (3);
Mechanism : Node_Id renames Args (4);
First_Optional_Parameter : Node_Id renames Args (5);
begin
GNAT_Pragma;
Gather_Associations (Names, Args);
Process_Extended_Import_Export_Subprogram_Pragma (
Arg_Internal => Internal,
Arg_External => External,
Arg_Parameter_Types => Parameter_Types,
Arg_Mechanism => Mechanism,
Arg_First_Optional_Parameter => First_Optional_Parameter);
end Import_Procedure;
-----------------------------
-- Import_Valued_Procedure --
-----------------------------
-- pragma Import_Valued_Procedure (
-- [Internal =>] LOCAL_NAME,
-- [, [External =>] EXTERNAL_SYMBOL]
-- [, [Parameter_Types =>] (PARAMETER_TYPES)]
-- [, [Mechanism =>] MECHANISM]
-- [, [First_Optional_Parameter =>] IDENTIFIER]);
-- EXTERNAL_SYMBOL ::=
-- IDENTIFIER
-- | static_string_EXPRESSION
-- PARAMETER_TYPES ::=
-- null
-- | TYPE_DESIGNATOR @{, TYPE_DESIGNATOR@}
-- TYPE_DESIGNATOR ::=
-- subtype_NAME
-- | subtype_Name ' Access
-- MECHANISM ::=
-- MECHANISM_NAME
-- | (MECHANISM_ASSOCIATION @{, MECHANISM_ASSOCIATION@})
-- MECHANISM_ASSOCIATION ::=
-- [formal_parameter_NAME =>] MECHANISM_NAME
-- MECHANISM_NAME ::=
-- Value
-- | Reference
-- | Descriptor [([Class =>] CLASS_NAME)]
-- CLASS_NAME ::= ubs | ubsb | uba | s | sb | a | nca
when Pragma_Import_Valued_Procedure =>
Import_Valued_Procedure : declare
Args : Args_List (1 .. 5);
Names : constant Name_List (1 .. 5) := (
Name_Internal,
Name_External,
Name_Parameter_Types,
Name_Mechanism,
Name_First_Optional_Parameter);
Internal : Node_Id renames Args (1);
External : Node_Id renames Args (2);
Parameter_Types : Node_Id renames Args (3);
Mechanism : Node_Id renames Args (4);
First_Optional_Parameter : Node_Id renames Args (5);
begin
GNAT_Pragma;
Gather_Associations (Names, Args);
Process_Extended_Import_Export_Subprogram_Pragma (
Arg_Internal => Internal,
Arg_External => External,
Arg_Parameter_Types => Parameter_Types,
Arg_Mechanism => Mechanism,
Arg_First_Optional_Parameter => First_Optional_Parameter);
end Import_Valued_Procedure;
------------------------
-- Initialize_Scalars --
------------------------
-- pragma Initialize_Scalars;
when Pragma_Initialize_Scalars =>
GNAT_Pragma;
Check_Arg_Count (0);
Check_Valid_Configuration_Pragma;
Check_Restriction (No_Initialize_Scalars, N);
if not Restriction_Active (No_Initialize_Scalars) then
Init_Or_Norm_Scalars := True;
Initialize_Scalars := True;
end if;
------------
-- Inline --
------------
-- pragma Inline ( NAME {, NAME} );
when Pragma_Inline =>
-- Pragma is active if inlining option is active
Process_Inline (Inline_Active);
-------------------
-- Inline_Always --
-------------------
-- pragma Inline_Always ( NAME {, NAME} );
when Pragma_Inline_Always =>
Process_Inline (True);
--------------------
-- Inline_Generic --
--------------------
-- pragma Inline_Generic (NAME {, NAME});
when Pragma_Inline_Generic =>
Process_Generic_List;
----------------------
-- Inspection_Point --
----------------------
-- pragma Inspection_Point [(object_NAME {, object_NAME})];
when Pragma_Inspection_Point => Inspection_Point : declare
Arg : Node_Id;
Exp : Node_Id;
begin
if Arg_Count > 0 then
Arg := Arg1;
loop
Exp := Expression (Arg);
Analyze (Exp);
if not Is_Entity_Name (Exp)
or else not Is_Object (Entity (Exp))
then
Error_Pragma_Arg ("object name required", Arg);
end if;
Next (Arg);
exit when No (Arg);
end loop;
end if;
end Inspection_Point;
---------------
-- Interface --
---------------
-- pragma Interface (
-- convention_IDENTIFIER,
-- local_NAME );
when Pragma_Interface =>
GNAT_Pragma;
Check_Arg_Count (2);
Check_No_Identifiers;
Process_Import_Or_Interface;
--------------------
-- Interface_Name --
--------------------
-- pragma Interface_Name (
-- [ Entity =>] local_NAME
-- [,[External_Name =>] static_string_EXPRESSION ]
-- [,[Link_Name =>] static_string_EXPRESSION ]);
when Pragma_Interface_Name => Interface_Name : declare
Id : Node_Id;
Def_Id : Entity_Id;
Hom_Id : Entity_Id;
Found : Boolean;
begin
GNAT_Pragma;
Check_Arg_Order
((Name_Entity, Name_External_Name, Name_Link_Name));
Check_At_Least_N_Arguments (2);
Check_At_Most_N_Arguments (3);
Id := Expression (Arg1);
Analyze (Id);
if not Is_Entity_Name (Id) then
Error_Pragma_Arg
("first argument for pragma% must be entity name", Arg1);
elsif Etype (Id) = Any_Type then
return;
else
Def_Id := Entity (Id);
end if;
-- Special DEC-compatible processing for the object case,
-- forces object to be imported.
if Ekind (Def_Id) = E_Variable then
Kill_Size_Check_Code (Def_Id);
Note_Possible_Modification (Id);
-- Initialization is not allowed for imported variable
if Present (Expression (Parent (Def_Id)))
and then Comes_From_Source (Expression (Parent (Def_Id)))
then
Error_Msg_Sloc := Sloc (Def_Id);
Error_Pragma_Arg
("no initialization allowed for declaration of& #",
Arg2);
else
-- For compatibility, support VADS usage of providing both
-- pragmas Interface and Interface_Name to obtain the effect
-- of a single Import pragma.
if Is_Imported (Def_Id)
and then Present (First_Rep_Item (Def_Id))
and then Nkind (First_Rep_Item (Def_Id)) = N_Pragma
and then Chars (First_Rep_Item (Def_Id)) = Name_Interface
then
null;
else
Set_Imported (Def_Id);
end if;
Set_Is_Public (Def_Id);
Process_Interface_Name (Def_Id, Arg2, Arg3);
end if;
-- Otherwise must be subprogram
elsif not Is_Subprogram (Def_Id) then
Error_Pragma_Arg
("argument of pragma% is not subprogram", Arg1);
else
Check_At_Most_N_Arguments (3);
Hom_Id := Def_Id;
Found := False;
-- Loop through homonyms
loop
Def_Id := Get_Base_Subprogram (Hom_Id);
if Is_Imported (Def_Id) then
Process_Interface_Name (Def_Id, Arg2, Arg3);
Found := True;
end if;
Hom_Id := Homonym (Hom_Id);
exit when No (Hom_Id)
or else Scope (Hom_Id) /= Current_Scope;
end loop;
if not Found then
Error_Pragma_Arg
("argument of pragma% is not imported subprogram",
Arg1);
end if;
end if;
end Interface_Name;
-----------------------
-- Interrupt_Handler --
-----------------------
-- pragma Interrupt_Handler (handler_NAME);
when Pragma_Interrupt_Handler =>
Check_Ada_83_Warning;
Check_Arg_Count (1);
Check_No_Identifiers;
if No_Run_Time_Mode then
Error_Msg_CRT ("Interrupt_Handler pragma", N);
else
Check_Interrupt_Or_Attach_Handler;
Process_Interrupt_Or_Attach_Handler;
end if;
------------------------
-- Interrupt_Priority --
------------------------
-- pragma Interrupt_Priority [(EXPRESSION)];
when Pragma_Interrupt_Priority => Interrupt_Priority : declare
P : constant Node_Id := Parent (N);
Arg : Node_Id;
begin
Check_Ada_83_Warning;
if Arg_Count /= 0 then
Arg := Expression (Arg1);
Check_Arg_Count (1);
Check_No_Identifiers;
-- The expression must be analyzed in the special manner
-- described in "Handling of Default and Per-Object
-- Expressions" in sem.ads.
Analyze_Per_Use_Expression (Arg, RTE (RE_Interrupt_Priority));
end if;
if Nkind (P) /= N_Task_Definition
and then Nkind (P) /= N_Protected_Definition
then
Pragma_Misplaced;
return;
elsif Has_Priority_Pragma (P) then
Error_Pragma ("duplicate pragma% not allowed");
else
Set_Has_Priority_Pragma (P, True);
Record_Rep_Item (Defining_Identifier (Parent (P)), N);
end if;
end Interrupt_Priority;
---------------------
-- Interrupt_State --
---------------------
-- pragma Interrupt_State (
-- [Name =>] INTERRUPT_ID,
-- [State =>] INTERRUPT_STATE);
-- INTERRUPT_ID => IDENTIFIER | static_integer_EXPRESSION
-- INTERRUPT_STATE => System | Runtime | User
-- Note: if the interrupt id is given as an identifier, then
-- it must be one of the identifiers in Ada.Interrupts.Names.
-- Otherwise it is given as a static integer expression which
-- must be in the range of Ada.Interrupts.Interrupt_ID.
when Pragma_Interrupt_State => Interrupt_State : declare
Int_Id : constant Entity_Id := RTE (RE_Interrupt_ID);
-- This is the entity Ada.Interrupts.Interrupt_ID;
State_Type : Character;
-- Set to 's'/'r'/'u' for System/Runtime/User
IST_Num : Pos;
-- Index to entry in Interrupt_States table
Int_Val : Uint;
-- Value of interrupt
Arg1X : constant Node_Id := Get_Pragma_Arg (Arg1);
-- The first argument to the pragma
Int_Ent : Entity_Id;
-- Interrupt entity in Ada.Interrupts.Names
begin
GNAT_Pragma;
Check_Arg_Order ((Name_Name, Name_State));
Check_Arg_Count (2);
Check_Optional_Identifier (Arg1, Name_Name);
Check_Optional_Identifier (Arg2, Name_State);
Check_Arg_Is_Identifier (Arg2);
-- First argument is identifier
if Nkind (Arg1X) = N_Identifier then
-- Search list of names in Ada.Interrupts.Names
Int_Ent := First_Entity (RTE (RE_Names));
loop
if No (Int_Ent) then
Error_Pragma_Arg ("invalid interrupt name", Arg1);
elsif Chars (Int_Ent) = Chars (Arg1X) then
Int_Val := Expr_Value (Constant_Value (Int_Ent));
exit;
end if;
Next_Entity (Int_Ent);
end loop;
-- First argument is not an identifier, so it must be a
-- static expression of type Ada.Interrupts.Interrupt_ID.
else
Check_Arg_Is_Static_Expression (Arg1, Any_Integer);
Int_Val := Expr_Value (Arg1X);
if Int_Val < Expr_Value (Type_Low_Bound (Int_Id))
or else
Int_Val > Expr_Value (Type_High_Bound (Int_Id))
then
Error_Pragma_Arg
("value not in range of type " &
"""Ada.Interrupts.Interrupt_'I'D""", Arg1);
end if;
end if;
-- Check OK state
case Chars (Get_Pragma_Arg (Arg2)) is
when Name_Runtime => State_Type := 'r';
when Name_System => State_Type := 's';
when Name_User => State_Type := 'u';
when others =>
Error_Pragma_Arg ("invalid interrupt state", Arg2);
end case;
-- Check if entry is already stored
IST_Num := Interrupt_States.First;
loop
-- If entry not found, add it
if IST_Num > Interrupt_States.Last then
Interrupt_States.Append
((Interrupt_Number => UI_To_Int (Int_Val),
Interrupt_State => State_Type,
Pragma_Loc => Loc));
exit;
-- Case of entry for the same entry
elsif Int_Val = Interrupt_States.Table (IST_Num).
Interrupt_Number
then
-- If state matches, done, no need to make redundant entry
exit when
State_Type = Interrupt_States.Table (IST_Num).
Interrupt_State;
-- Otherwise if state does not match, error
Error_Msg_Sloc :=
Interrupt_States.Table (IST_Num).Pragma_Loc;
Error_Pragma_Arg
("state conflicts with that given at #", Arg2);
exit;
end if;
IST_Num := IST_Num + 1;
end loop;
end Interrupt_State;
----------------------
-- Java_Constructor --
----------------------
-- pragma Java_Constructor ([Entity =>] LOCAL_NAME);
when Pragma_Java_Constructor => Java_Constructor : declare
Id : Entity_Id;
Def_Id : Entity_Id;
Hom_Id : Entity_Id;
begin
GNAT_Pragma;
Check_Arg_Count (1);
Check_Optional_Identifier (Arg1, Name_Entity);
Check_Arg_Is_Local_Name (Arg1);
Id := Expression (Arg1);
Find_Program_Unit_Name (Id);
-- If we did not find the name, we are done
if Etype (Id) = Any_Type then
return;
end if;
Hom_Id := Entity (Id);
-- Loop through homonyms
loop
Def_Id := Get_Base_Subprogram (Hom_Id);
-- The constructor is required to be a function returning
-- an access type whose designated type has convention Java.
if Ekind (Def_Id) = E_Function
and then Ekind (Etype (Def_Id)) in Access_Kind
and then
(Atree.Convention
(Designated_Type (Etype (Def_Id))) = Convention_Java
or else
Atree.Convention
(Root_Type (Designated_Type (Etype (Def_Id))))
= Convention_Java)
then
Set_Is_Constructor (Def_Id);
Set_Convention (Def_Id, Convention_Java);
else
Error_Pragma_Arg
("pragma% requires function returning a 'Java access type",
Arg1);
end if;
Hom_Id := Homonym (Hom_Id);
exit when No (Hom_Id) or else Scope (Hom_Id) /= Current_Scope;
end loop;
end Java_Constructor;
----------------------
-- Java_Interface --
----------------------
-- pragma Java_Interface ([Entity =>] LOCAL_NAME);
when Pragma_Java_Interface => Java_Interface : declare
Arg : Node_Id;
Typ : Entity_Id;
begin
GNAT_Pragma;
Check_Arg_Count (1);
Check_Optional_Identifier (Arg1, Name_Entity);
Check_Arg_Is_Local_Name (Arg1);
Arg := Expression (Arg1);
Analyze (Arg);
if Etype (Arg) = Any_Type then
return;
end if;
if not Is_Entity_Name (Arg)
or else not Is_Type (Entity (Arg))
then
Error_Pragma_Arg ("pragma% requires a type mark", Arg1);
end if;
Typ := Underlying_Type (Entity (Arg));
-- For now we simply check some of the semantic constraints
-- on the type. This currently leaves out some restrictions
-- on interface types, namely that the parent type must be
-- java.lang.Object.Typ and that all primitives of the type
-- should be declared abstract. ???
if not Is_Tagged_Type (Typ) or else not Is_Abstract (Typ) then
Error_Pragma_Arg ("pragma% requires an abstract "
& "tagged type", Arg1);
elsif not Has_Discriminants (Typ)
or else Ekind (Etype (First_Discriminant (Typ)))
/= E_Anonymous_Access_Type
or else
not Is_Class_Wide_Type
(Designated_Type (Etype (First_Discriminant (Typ))))
then
Error_Pragma_Arg
("type must have a class-wide access discriminant", Arg1);
end if;
end Java_Interface;
----------------
-- Keep_Names --
----------------
-- pragma Keep_Names ([On => ] local_NAME);
when Pragma_Keep_Names => Keep_Names : declare
Arg : Node_Id;
begin
GNAT_Pragma;
Check_Arg_Count (1);
Check_Optional_Identifier (Arg1, Name_On);
Check_Arg_Is_Local_Name (Arg1);
Arg := Expression (Arg1);
Analyze (Arg);
if Etype (Arg) = Any_Type then
return;
end if;
if not Is_Entity_Name (Arg)
or else Ekind (Entity (Arg)) /= E_Enumeration_Type
then
Error_Pragma_Arg
("pragma% requires a local enumeration type", Arg1);
end if;
Set_Discard_Names (Entity (Arg), False);
end Keep_Names;
-------------
-- License --
-------------
-- pragma License (RESTRICTED | UNRESTRICTED | GPL | MODIFIED_GPL);
when Pragma_License =>
GNAT_Pragma;
Check_Arg_Count (1);
Check_No_Identifiers;
Check_Valid_Configuration_Pragma;
Check_Arg_Is_Identifier (Arg1);
declare
Sind : constant Source_File_Index :=
Source_Index (Current_Sem_Unit);
begin
case Chars (Get_Pragma_Arg (Arg1)) is
when Name_GPL =>
Set_License (Sind, GPL);
when Name_Modified_GPL =>
Set_License (Sind, Modified_GPL);
when Name_Restricted =>
Set_License (Sind, Restricted);
when Name_Unrestricted =>
Set_License (Sind, Unrestricted);
when others =>
Error_Pragma_Arg ("invalid license name", Arg1);
end case;
end;
---------------
-- Link_With --
---------------
-- pragma Link_With (string_EXPRESSION {, string_EXPRESSION});
when Pragma_Link_With => Link_With : declare
Arg : Node_Id;
begin
GNAT_Pragma;
if Operating_Mode = Generate_Code
and then In_Extended_Main_Source_Unit (N)
then
Check_At_Least_N_Arguments (1);
Check_No_Identifiers;
Check_Is_In_Decl_Part_Or_Package_Spec;
Check_Arg_Is_Static_Expression (Arg1, Standard_String);
Start_String;
Arg := Arg1;
while Present (Arg) loop
Check_Arg_Is_Static_Expression (Arg, Standard_String);
-- Store argument, converting sequences of spaces
-- to a single null character (this is one of the
-- differences in processing between Link_With
-- and Linker_Options).
declare
C : constant Char_Code := Get_Char_Code (' ');
S : constant String_Id :=
Strval (Expr_Value_S (Expression (Arg)));
L : constant Nat := String_Length (S);
F : Nat := 1;
procedure Skip_Spaces;
-- Advance F past any spaces
procedure Skip_Spaces is
begin
while F <= L and then Get_String_Char (S, F) = C loop
F := F + 1;
end loop;
end Skip_Spaces;
begin
Skip_Spaces; -- skip leading spaces
-- Loop through characters, changing any embedded
-- sequence of spaces to a single null character
-- (this is how Link_With/Linker_Options differ)
while F <= L loop
if Get_String_Char (S, F) = C then
Skip_Spaces;
exit when F > L;
Store_String_Char (ASCII.NUL);
else
Store_String_Char (Get_String_Char (S, F));
F := F + 1;
end if;
end loop;
end;
Arg := Next (Arg);
if Present (Arg) then
Store_String_Char (ASCII.NUL);
end if;
end loop;
Store_Linker_Option_String (End_String);
end if;
end Link_With;
------------------
-- Linker_Alias --
------------------
-- pragma Linker_Alias (
-- [Entity =>] LOCAL_NAME
-- [Target =>] static_string_EXPRESSION);
when Pragma_Linker_Alias =>
GNAT_Pragma;
Check_Arg_Order ((Name_Entity, Name_Target));
Check_Arg_Count (2);
Check_Optional_Identifier (Arg1, Name_Entity);
Check_Optional_Identifier (Arg2, Name_Target);
Check_Arg_Is_Library_Level_Local_Name (Arg1);
Check_Arg_Is_Static_Expression (Arg2, Standard_String);
-- The only processing required is to link this item on to the
-- list of rep items for the given entity. This is accomplished
-- by the call to Rep_Item_Too_Late (when no error is detected
-- and False is returned).
if Rep_Item_Too_Late (Entity (Expression (Arg1)), N) then
return;
else
Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
end if;
------------------------
-- Linker_Constructor --
------------------------
-- pragma Linker_Constructor (procedure_LOCAL_NAME);
-- Code is shared with Linker_Destructor
-----------------------
-- Linker_Destructor --
-----------------------
-- pragma Linker_Destructor (procedure_LOCAL_NAME);
when Pragma_Linker_Constructor |
Pragma_Linker_Destructor =>
Linker_Constructor : declare
Arg1_X : Node_Id;
Proc : Entity_Id;
begin
GNAT_Pragma;
Check_Arg_Count (1);
Check_No_Identifiers;
Check_Arg_Is_Local_Name (Arg1);
Arg1_X := Expression (Arg1);
Analyze (Arg1_X);
Proc := Find_Unique_Parameterless_Procedure (Arg1_X, Arg1);
if not Is_Library_Level_Entity (Proc) then
Error_Pragma_Arg
("argument for pragma% must be library level entity", Arg1);
end if;
-- The only processing required is to link this item on to the
-- list of rep items for the given entity. This is accomplished
-- by the call to Rep_Item_Too_Late (when no error is detected
-- and False is returned).
if Rep_Item_Too_Late (Proc, N) then
return;
else
Set_Has_Gigi_Rep_Item (Proc);
end if;
end Linker_Constructor;
--------------------
-- Linker_Options --
--------------------
-- pragma Linker_Options (string_EXPRESSION {, string_EXPRESSION});
when Pragma_Linker_Options => Linker_Options : declare
Arg : Node_Id;
begin
Check_Ada_83_Warning;
Check_No_Identifiers;
Check_Arg_Count (1);
Check_Is_In_Decl_Part_Or_Package_Spec;
if Operating_Mode = Generate_Code
and then In_Extended_Main_Source_Unit (N)
then
Check_Arg_Is_Static_Expression (Arg1, Standard_String);
Start_String (Strval (Expr_Value_S (Expression (Arg1))));
Arg := Arg2;
while Present (Arg) loop
Check_Arg_Is_Static_Expression (Arg, Standard_String);
Store_String_Char (ASCII.NUL);
Store_String_Chars
(Strval (Expr_Value_S (Expression (Arg))));
Arg := Next (Arg);
end loop;
Store_Linker_Option_String (End_String);
end if;
end Linker_Options;
--------------------
-- Linker_Section --
--------------------
-- pragma Linker_Section (
-- [Entity =>] LOCAL_NAME
-- [Section =>] static_string_EXPRESSION);
when Pragma_Linker_Section =>
GNAT_Pragma;
Check_Arg_Order ((Name_Entity, Name_Section));
Check_Arg_Count (2);
Check_Optional_Identifier (Arg1, Name_Entity);
Check_Optional_Identifier (Arg2, Name_Section);
Check_Arg_Is_Library_Level_Local_Name (Arg1);
Check_Arg_Is_Static_Expression (Arg2, Standard_String);
-- The only processing required is to link this item on to the
-- list of rep items for the given entity. This is accomplished
-- by the call to Rep_Item_Too_Late (when no error is detected
-- and False is returned).
if Rep_Item_Too_Late (Entity (Expression (Arg1)), N) then
return;
else
Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
end if;
----------
-- List --
----------
-- pragma List (On | Off)
-- There is nothing to do here, since we did all the processing
-- for this pragma in Par.Prag (so that it works properly even in
-- syntax only mode)
when Pragma_List =>
null;
--------------------
-- Locking_Policy --
--------------------
-- pragma Locking_Policy (policy_IDENTIFIER);
when Pragma_Locking_Policy => declare
LP : Character;
begin
Check_Ada_83_Warning;
Check_Arg_Count (1);
Check_No_Identifiers;
Check_Arg_Is_Locking_Policy (Arg1);
Check_Valid_Configuration_Pragma;
Get_Name_String (Chars (Expression (Arg1)));
LP := Fold_Upper (Name_Buffer (1));
if Locking_Policy /= ' '
and then Locking_Policy /= LP
then
Error_Msg_Sloc := Locking_Policy_Sloc;
Error_Pragma ("locking policy incompatible with policy#");
-- Set new policy, but always preserve System_Location since
-- we like the error message with the run time name.
else
Locking_Policy := LP;
if Locking_Policy_Sloc /= System_Location then
Locking_Policy_Sloc := Loc;
end if;
end if;
end;
----------------
-- Long_Float --
----------------
-- pragma Long_Float (D_Float | G_Float);
when Pragma_Long_Float =>
GNAT_Pragma;
Check_Valid_Configuration_Pragma;
Check_Arg_Count (1);
Check_No_Identifier (Arg1);
Check_Arg_Is_One_Of (Arg1, Name_D_Float, Name_G_Float);
if not OpenVMS_On_Target then
Error_Pragma ("?pragma% ignored (applies only to Open'V'M'S)");
end if;
-- D_Float case
if Chars (Expression (Arg1)) = Name_D_Float then
if Opt.Float_Format_Long = 'G' then
Error_Pragma ("G_Float previously specified");
end if;
Opt.Float_Format_Long := 'D';
-- G_Float case (this is the default, does not need overriding)
else
if Opt.Float_Format_Long = 'D' then
Error_Pragma ("D_Float previously specified");
end if;
Opt.Float_Format_Long := 'G';
end if;
Set_Standard_Fpt_Formats;
-----------------------
-- Machine_Attribute --
-----------------------
-- pragma Machine_Attribute (
-- [Entity =>] LOCAL_NAME,
-- [Attribute_Name =>] static_string_EXPRESSION
-- [,[Info =>] static_string_EXPRESSION] );
when Pragma_Machine_Attribute => Machine_Attribute : declare
Def_Id : Entity_Id;
begin
GNAT_Pragma;
Check_Arg_Order ((Name_Entity, Name_Attribute_Name, Name_Info));
if Arg_Count = 3 then
Check_Optional_Identifier (Arg3, Name_Info);
Check_Arg_Is_Static_Expression (Arg3, Standard_String);
else
Check_Arg_Count (2);
end if;
Check_Optional_Identifier (Arg1, Name_Entity);
Check_Optional_Identifier (Arg2, Name_Attribute_Name);
Check_Arg_Is_Local_Name (Arg1);
Check_Arg_Is_Static_Expression (Arg2, Standard_String);
Def_Id := Entity (Expression (Arg1));
if Is_Access_Type (Def_Id) then
Def_Id := Designated_Type (Def_Id);
end if;
if Rep_Item_Too_Early (Def_Id, N) then
return;
end if;
Def_Id := Underlying_Type (Def_Id);
-- The only processing required is to link this item on to the
-- list of rep items for the given entity. This is accomplished
-- by the call to Rep_Item_Too_Late (when no error is detected
-- and False is returned).
if Rep_Item_Too_Late (Def_Id, N) then
return;
else
Set_Has_Gigi_Rep_Item (Entity (Expression (Arg1)));
end if;
end Machine_Attribute;
----------
-- Main --
----------
-- pragma Main_Storage
-- (MAIN_STORAGE_OPTION [, MAIN_STORAGE_OPTION]);
-- MAIN_STORAGE_OPTION ::=
-- [WORKING_STORAGE =>] static_SIMPLE_EXPRESSION
-- | [TOP_GUARD =>] static_SIMPLE_EXPRESSION
when Pragma_Main => Main : declare
Args : Args_List (1 .. 3);
Names : constant Name_List (1 .. 3) := (
Name_Stack_Size,
Name_Task_Stack_Size_Default,
Name_Time_Slicing_Enabled);
Nod : Node_Id;
begin
GNAT_Pragma;
Gather_Associations (Names, Args);
for J in 1 .. 2 loop
if Present (Args (J)) then
Check_Arg_Is_Static_Expression (Args (J), Any_Integer);
end if;
end loop;
if Present (Args (3)) then
Check_Arg_Is_Static_Expression (Args (3), Standard_Boolean);
end if;
Nod := Next (N);
while Present (Nod) loop
if Nkind (Nod) = N_Pragma
and then Chars (Nod) = Name_Main
then
Error_Msg_Name_1 := Chars (N);
Error_Msg_N ("duplicate pragma% not permitted", Nod);
end if;
Next (Nod);
end loop;
end Main;
------------------
-- Main_Storage --
------------------
-- pragma Main_Storage
-- (MAIN_STORAGE_OPTION [, MAIN_STORAGE_OPTION]);
-- MAIN_STORAGE_OPTION ::=
-- [WORKING_STORAGE =>] static_SIMPLE_EXPRESSION
-- | [TOP_GUARD =>] static_SIMPLE_EXPRESSION
when Pragma_Main_Storage => Main_Storage : declare
Args : Args_List (1 .. 2);
Names : constant Name_List (1 .. 2) := (
Name_Working_Storage,
Name_Top_Guard);
Nod : Node_Id;
begin
GNAT_Pragma;
Gather_Associations (Names, Args);
for J in 1 .. 2 loop
if Present (Args (J)) then
Check_Arg_Is_Static_Expression (Args (J), Any_Integer);
end if;
end loop;
Check_In_Main_Program;
Nod := Next (N);
while Present (Nod) loop
if Nkind (Nod) = N_Pragma
and then Chars (Nod) = Name_Main_Storage
then
Error_Msg_Name_1 := Chars (N);
Error_Msg_N ("duplicate pragma% not permitted", Nod);
end if;
Next (Nod);
end loop;
end Main_Storage;
-----------------
-- Memory_Size --
-----------------
-- pragma Memory_Size (NUMERIC_LITERAL)
when Pragma_Memory_Size =>
GNAT_Pragma;
-- Memory size is simply ignored
Check_No_Identifiers;
Check_Arg_Count (1);
Check_Arg_Is_Integer_Literal (Arg1);
---------------
-- No_Return --
---------------
-- pragma No_Return (procedure_LOCAL_NAME {, procedure_Local_Name});
when Pragma_No_Return => No_Return : declare
Id : Node_Id;
E : Entity_Id;
Found : Boolean;
Arg : Node_Id;
begin
GNAT_Pragma;
Check_At_Least_N_Arguments (1);
-- Loop through arguments of pragma
Arg := Arg1;
while Present (Arg) loop
Check_Arg_Is_Local_Name (Arg);
Id := Expression (Arg);
Analyze (Id);
if not Is_Entity_Name (Id) then
Error_Pragma_Arg ("entity name required", Arg);
end if;
if Etype (Id) = Any_Type then
raise Pragma_Exit;
end if;
-- Loop to find matching procedures
E := Entity (Id);
Found := False;
while Present (E)
and then Scope (E) = Current_Scope
loop
if Ekind (E) = E_Procedure
or else Ekind (E) = E_Generic_Procedure
then
Set_No_Return (E);
Found := True;
end if;
E := Homonym (E);
end loop;
if not Found then
Error_Pragma_Arg ("no procedure & found for pragma%", Arg);
end if;
Next (Arg);
end loop;
end No_Return;
------------------------
-- No_Strict_Aliasing --
------------------------
-- pragma No_Strict_Aliasing [([Entity =>] type_LOCAL_NAME)];
when Pragma_No_Strict_Aliasing => No_Strict_Alias : declare
E_Id : Entity_Id;
begin
GNAT_Pragma;
Check_At_Most_N_Arguments (1);
if Arg_Count = 0 then
Check_Valid_Configuration_Pragma;
Opt.No_Strict_Aliasing := True;
else
Check_Optional_Identifier (Arg2, Name_Entity);
Check_Arg_Is_Local_Name (Arg1);
E_Id := Entity (Expression (Arg1));
if E_Id = Any_Type then
return;
elsif No (E_Id) or else not Is_Access_Type (E_Id) then
Error_Pragma_Arg ("pragma% requires access type", Arg1);
end if;
Set_No_Strict_Aliasing (Implementation_Base_Type (E_Id));
end if;
end No_Strict_Alias;
-----------------
-- Obsolescent --
-----------------
-- pragma Obsolescent [(static_string_EXPRESSION [, Ada_05])];
when Pragma_Obsolescent => Obsolescent : declare
Subp : Node_Or_Entity_Id;
S : String_Id;
Active : Boolean := True;
procedure Check_Obsolete_Subprogram;
-- Checks if Subp is a subprogram declaration node, and if so
-- replaces Subp by the defining entity of the subprogram. If not,
-- issues an error message
------------------------------
-- Check_Obsolete_Subprogram--
------------------------------
procedure Check_Obsolete_Subprogram is
begin
if Nkind (Subp) /= N_Subprogram_Declaration then
Error_Pragma
("pragma% misplaced, must immediately " &
"follow subprogram/package declaration");
else
Subp := Defining_Entity (Subp);
end if;
end Check_Obsolete_Subprogram;
-- Start of processing for pragma Obsolescent
begin
GNAT_Pragma;
Check_At_Most_N_Arguments (2);
Check_No_Identifiers;
-- Check OK placement
-- First possibility is within a declarative region, where the
-- pragma immediately follows a subprogram declaration.
if Present (Prev (N)) then
Subp := Prev (N);
Check_Obsolete_Subprogram;
-- Second possibility, stand alone subprogram declaration with the
-- pragma immediately following the declaration.
elsif No (Prev (N))
and then Nkind (Parent (N)) = N_Compilation_Unit_Aux
then
Subp := Unit (Parent (Parent (N)));
Check_Obsolete_Subprogram;
-- Only other possibility is library unit placement for package
else
Subp := Find_Lib_Unit_Name;
if Ekind (Subp) /= E_Package
and then Ekind (Subp) /= E_Generic_Package
then
Check_Obsolete_Subprogram;
end if;
end if;
-- If OK placement, acquire arguments
if Arg_Count >= 1 then
-- Deal with static string argument
Check_Arg_Is_Static_Expression (Arg1, Standard_String);
S := Strval (Expression (Arg1));
for J in 1 .. String_Length (S) loop
if not In_Character_Range (Get_String_Char (S, J)) then
Error_Pragma_Arg
("pragma% argument does not allow wide characters",
Arg1);
end if;
end loop;
Set_Obsolescent_Warning (Subp, Expression (Arg1));
-- Check for Ada_05 parameter
if Arg_Count /= 1 then
Check_Arg_Count (2);
declare
Argx : constant Node_Id := Get_Pragma_Arg (Arg2);
begin
Check_Arg_Is_Identifier (Argx);
if Chars (Argx) /= Name_Ada_05 then
Error_Msg_Name_2 := Name_Ada_05;
Error_Pragma_Arg
("only allowed argument for pragma% is %", Argx);
end if;
if Ada_Version_Explicit < Ada_05
or else not Warn_On_Ada_2005_Compatibility
then
Active := False;
end if;
end;
end if;
end if;
-- Set flag if pragma active
if Active then
Set_Is_Obsolescent (Subp);
end if;
end Obsolescent;
-----------------
-- No_Run_Time --
-----------------
-- pragma No_Run_Time
-- Note: this pragma is retained for backwards compatibiltiy.
-- See body of Rtsfind for full details on its handling.
when Pragma_No_Run_Time =>
GNAT_Pragma;
Check_Valid_Configuration_Pragma;
Check_Arg_Count (0);
No_Run_Time_Mode := True;
Configurable_Run_Time_Mode := True;
declare
Word32 : constant Boolean := Ttypes.System_Word_Size = 32;
begin
if Word32 then
Duration_32_Bits_On_Target := True;
end if;
end;
Set_Restriction (No_Finalization, N);
Set_Restriction (No_Exception_Handlers, N);
Set_Restriction (Max_Tasks, N, 0);
Set_Restriction (No_Tasking, N);
-----------------------
-- Normalize_Scalars --
-----------------------
-- pragma Normalize_Scalars;
when Pragma_Normalize_Scalars =>
Check_Ada_83_Warning;
Check_Arg_Count (0);
Check_Valid_Configuration_Pragma;
Normalize_Scalars := True;
Init_Or_Norm_Scalars := True;
--------------
-- Optimize --
--------------
-- pragma Optimize (Time | Space);
-- The actual check for optimize is done in Gigi. Note that this
-- pragma does not actually change the optimization setting, it
-- simply checks that it is consistent with the pragma.
when Pragma_Optimize =>
Check_No_Identifiers;
Check_Arg_Count (1);
Check_Arg_Is_One_Of (Arg1, Name_Time, Name_Space, Name_Off);
-------------------------
-- Optional_Overriding --
-------------------------
-- These pragmas are treated as part of the previous subprogram
-- declaration, and analyzed immediately after it (see sem_ch6,
-- Check_Overriding_Operation). If the pragma has not been analyzed
-- yet, it appears in the wrong place.
when Pragma_Optional_Overriding =>
Error_Msg_N ("pragma must appear immediately after subprogram", N);
----------
-- Pack --
----------
-- pragma Pack (first_subtype_LOCAL_NAME);
when Pragma_Pack => Pack : declare
Assoc : constant Node_Id := Arg1;
Type_Id : Node_Id;
Typ : Entity_Id;
begin
Check_No_Identifiers;
Check_Arg_Count (1);
Check_Arg_Is_Local_Name (Arg1);
Type_Id := Expression (Assoc);
Find_Type (Type_Id);
Typ := Entity (Type_Id);
if Typ = Any_Type
or else Rep_Item_Too_Early (Typ, N)
then
return;
else
Typ := Underlying_Type (Typ);
end if;
if not Is_Array_Type (Typ) and then not Is_Record_Type (Typ) then
Error_Pragma ("pragma% must specify array or record type");
end if;
Check_First_Subtype (Arg1);
if Has_Pragma_Pack (Typ) then
Error_Pragma ("duplicate pragma%, only one allowed");
-- Array type
elsif Is_Array_Type (Typ) then
-- Pack not allowed for aliased or atomic components
if Has_Aliased_Components (Base_Type (Typ)) then
Error_Pragma
("pragma% ignored, cannot pack aliased components?");
elsif Has_Atomic_Components (Typ)
or else Is_Atomic (Component_Type (Typ))
then
Error_Pragma
("?pragma% ignored, cannot pack atomic components");
end if;
-- If we had an explicit component size given, then we do not
-- let Pack override this given size. We also give a warning
-- that Pack is being ignored unless we can tell for sure that
-- the Pack would not have had any effect anyway.
if Has_Component_Size_Clause (Typ) then
if Known_Static_RM_Size (Component_Type (Typ))
and then
RM_Size (Component_Type (Typ)) = Component_Size (Typ)
then
null;
else
Error_Pragma
("?pragma% ignored, explicit component size given");
end if;
-- If no prior array component size given, Pack is effective
else
if not Rep_Item_Too_Late (Typ, N) then
Set_Is_Packed (Base_Type (Typ));
Set_Has_Pragma_Pack (Base_Type (Typ));
Set_Has_Non_Standard_Rep (Base_Type (Typ));
end if;
end if;
-- For record types, the pack is always effective
else pragma Assert (Is_Record_Type (Typ));
if not Rep_Item_Too_Late (Typ, N) then
Set_Has_Pragma_Pack (Base_Type (Typ));
Set_Is_Packed (Base_Type (Typ));
Set_Has_Non_Standard_Rep (Base_Type (Typ));
end if;
end if;
end Pack;
----------
-- Page --
----------
-- pragma Page;
-- There is nothing to do here, since we did all the processing
-- for this pragma in Par.Prag (so that it works properly even in
-- syntax only mode)
when Pragma_Page =>
null;
-------------
-- Passive --
-------------
-- pragma Passive [(PASSIVE_FORM)];
-- PASSIVE_FORM ::= Semaphore | No
when Pragma_Passive =>
GNAT_Pragma;
if Nkind (Parent (N)) /= N_Task_Definition then
Error_Pragma ("pragma% must be within task definition");
end if;
if Arg_Count /= 0 then
Check_Arg_Count (1);
Check_Arg_Is_One_Of (Arg1, Name_Semaphore, Name_No);
end if;
-------------
-- Polling --
-------------
-- pragma Polling (ON | OFF);
when Pragma_Polling =>
GNAT_Pragma;
Check_Arg_Count (1);
Check_No_Identifiers;
Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
Polling_Required := (Chars (Expression (Arg1)) = Name_On);
--------------------
-- Persistent_BSS --
--------------------
when Pragma_Persistent_BSS => Persistent_BSS : declare
Decl : Node_Id;
Ent : Entity_Id;
Prag : Node_Id;
begin
GNAT_Pragma;
Check_At_Most_N_Arguments (1);
-- Case of application to specific object (one argument)
if Arg_Count = 1 then
Check_Arg_Is_Library_Level_Local_Name (Arg1);
if not Is_Entity_Name (Expression (Arg1))
or else
(Ekind (Entity (Expression (Arg1))) /= E_Variable
and then Ekind (Entity (Expression (Arg1))) /= E_Constant)
then
Error_Pragma_Arg ("pragma% only applies to objects", Arg1);
end if;
Ent := Entity (Expression (Arg1));
Decl := Parent (Ent);
if Rep_Item_Too_Late (Ent, N) then
return;
end if;
if Present (Expression (Decl)) then
Error_Pragma_Arg
("object for pragma% cannot have initialization", Arg1);
end if;
if not Is_Potentially_Persistent_Type (Etype (Ent)) then
Error_Pragma_Arg
("object type for pragma% is not potentially persistent",
Arg1);
end if;
Prag :=
Make_Linker_Section_Pragma
(Ent, Sloc (N), ".persistent.bss");
Insert_After (N, Prag);
Analyze (Prag);
-- Case of use as configuration pragma with no arguments
else
Check_Valid_Configuration_Pragma;
Persistent_BSS_Mode := True;
end if;
end Persistent_BSS;
------------------
-- Preelaborate --
------------------
-- pragma Preelaborate [(library_unit_NAME)];
-- Set the flag Is_Preelaborated of program unit name entity
when Pragma_Preelaborate => Preelaborate : declare
Pa : constant Node_Id := Parent (N);
Pk : constant Node_Kind := Nkind (Pa);
Ent : Entity_Id;
begin
Check_Ada_83_Warning;
Check_Valid_Library_Unit_Pragma;
if Nkind (N) = N_Null_Statement then
return;
end if;
Ent := Find_Lib_Unit_Name;
-- This filters out pragmas inside generic parent then
-- show up inside instantiation
if Present (Ent)
and then not (Pk = N_Package_Specification
and then Present (Generic_Parent (Pa)))
then
if not Debug_Flag_U then
Set_Is_Preelaborated (Ent);
Set_Suppress_Elaboration_Warnings (Ent);
end if;
end if;
end Preelaborate;
---------------------
-- Preelaborate_05 --
---------------------
-- pragma Preelaborate_05 [(library_unit_NAME)];
-- This pragma is useable only in GNAT_Mode, where it is used like
-- pragma Preelaborate but it is only effective in Ada 2005 mode
-- (otherwise it is ignored). This is used to implement AI-362 which
-- recategorizes some run-time packages in Ada 2005 mode.
when Pragma_Preelaborate_05 => Preelaborate_05 : declare
Ent : Entity_Id;
begin
GNAT_Pragma;
Check_Valid_Library_Unit_Pragma;
if not GNAT_Mode then
Error_Pragma ("pragma% only available in GNAT mode");
end if;
if Nkind (N) = N_Null_Statement then
return;
end if;
-- This is one of the few cases where we need to test the value of
-- Ada_Version_Explicit rather than Ada_Version (which is always
-- set to Ada_05 in a predefined unit), we need to know the
-- explicit version set to know if this pragma is active.
if Ada_Version_Explicit >= Ada_05 then
Ent := Find_Lib_Unit_Name;
Set_Is_Preelaborated (Ent);
Set_Suppress_Elaboration_Warnings (Ent);
end if;
end Preelaborate_05;
--------------
-- Priority --
--------------
-- pragma Priority (EXPRESSION);
when Pragma_Priority => Priority : declare
P : constant Node_Id := Parent (N);
Arg : Node_Id;
begin
Check_No_Identifiers;
Check_Arg_Count (1);
-- Subprogram case
if Nkind (P) = N_Subprogram_Body then
Check_In_Main_Program;
Arg := Expression (Arg1);
Analyze_And_Resolve (Arg, Standard_Integer);
-- Must be static
if not Is_Static_Expression (Arg) then
Flag_Non_Static_Expr
("main subprogram priority is not static!", Arg);
raise Pragma_Exit;
-- If constraint error, then we already signalled an error
elsif Raises_Constraint_Error (Arg) then
null;
-- Otherwise check in range
else
declare
Val : constant Uint := Expr_Value (Arg);
begin
if Val < 0
or else Val > Expr_Value (Expression
(Parent (RTE (RE_Max_Priority))))
then
Error_Pragma_Arg
("main subprogram priority is out of range", Arg1);
end if;
end;
end if;
Set_Main_Priority
(Current_Sem_Unit, UI_To_Int (Expr_Value (Arg)));
-- Task or Protected, must be of type Integer
elsif Nkind (P) = N_Protected_Definition
or else
Nkind (P) = N_Task_Definition
then
Arg := Expression (Arg1);
-- The expression must be analyzed in the special manner
-- described in "Handling of Default and Per-Object
-- Expressions" in sem.ads.
Analyze_Per_Use_Expression (Arg, Standard_Integer);
if not Is_Static_Expression (Arg) then
Check_Restriction (Static_Priorities, Arg);
end if;
-- Anything else is incorrect
else
Pragma_Misplaced;
end if;
if Has_Priority_Pragma (P) then
Error_Pragma ("duplicate pragma% not allowed");
else
Set_Has_Priority_Pragma (P, True);
if Nkind (P) = N_Protected_Definition
or else
Nkind (P) = N_Task_Definition
then
Record_Rep_Item (Defining_Identifier (Parent (P)), N);
-- exp_ch9 should use this ???
end if;
end if;
end Priority;
-------------
-- Profile --
-------------
-- pragma Profile (profile_IDENTIFIER);
-- profile_IDENTIFIER => Protected | Ravenscar
when Pragma_Profile =>
Check_Arg_Count (1);
Check_Valid_Configuration_Pragma;
Check_No_Identifiers;
declare
Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
begin
if Chars (Argx) = Name_Ravenscar then
Set_Ravenscar_Profile (N);
elsif Chars (Argx) = Name_Restricted then
Set_Profile_Restrictions (Restricted, N, Warn => False);
else
Error_Pragma_Arg ("& is not a valid profile", Argx);
end if;
end;
----------------------
-- Profile_Warnings --
----------------------
-- pragma Profile_Warnings (profile_IDENTIFIER);
-- profile_IDENTIFIER => Protected | Ravenscar
when Pragma_Profile_Warnings =>
GNAT_Pragma;
Check_Arg_Count (1);
Check_Valid_Configuration_Pragma;
Check_No_Identifiers;
declare
Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
begin
if Chars (Argx) = Name_Ravenscar then
Set_Profile_Restrictions (Ravenscar, N, Warn => True);
elsif Chars (Argx) = Name_Restricted then
Set_Profile_Restrictions (Restricted, N, Warn => True);
else
Error_Pragma_Arg ("& is not a valid profile", Argx);
end if;
end;
--------------------------
-- Propagate_Exceptions --
--------------------------
-- pragma Propagate_Exceptions;
-- Note: this pragma is obsolete and has no effect
when Pragma_Propagate_Exceptions =>
GNAT_Pragma;
Check_Arg_Count (0);
if In_Extended_Main_Source_Unit (N) then
Propagate_Exceptions := True;
end if;
------------------
-- Psect_Object --
------------------
-- pragma Psect_Object (
-- [Internal =>] LOCAL_NAME,
-- [, [External =>] EXTERNAL_SYMBOL]
-- [, [Size =>] EXTERNAL_SYMBOL]);
when Pragma_Psect_Object | Pragma_Common_Object =>
Psect_Object : declare
Args : Args_List (1 .. 3);
Names : constant Name_List (1 .. 3) := (
Name_Internal,
Name_External,
Name_Size);
Internal : Node_Id renames Args (1);
External : Node_Id renames Args (2);
Size : Node_Id renames Args (3);
Def_Id : Entity_Id;
procedure Check_Too_Long (Arg : Node_Id);
-- Posts message if the argument is an identifier with more
-- than 31 characters, or a string literal with more than
-- 31 characters, and we are operating under VMS
--------------------
-- Check_Too_Long --
--------------------
procedure Check_Too_Long (Arg : Node_Id) is
X : constant Node_Id := Original_Node (Arg);
begin
if Nkind (X) /= N_String_Literal
and then
Nkind (X) /= N_Identifier
then
Error_Pragma_Arg
("inappropriate argument for pragma %", Arg);
end if;
if OpenVMS_On_Target then
if (Nkind (X) = N_String_Literal
and then String_Length (Strval (X)) > 31)
or else
(Nkind (X) = N_Identifier
and then Length_Of_Name (Chars (X)) > 31)
then
Error_Pragma_Arg
("argument for pragma % is longer than 31 characters",
Arg);
end if;
end if;
end Check_Too_Long;
-- Start of processing for Common_Object/Psect_Object
begin
GNAT_Pragma;
Gather_Associations (Names, Args);
Process_Extended_Import_Export_Internal_Arg (Internal);
Def_Id := Entity (Internal);
if Ekind (Def_Id) /= E_Constant
and then Ekind (Def_Id) /= E_Variable
then
Error_Pragma_Arg
("pragma% must designate an object", Internal);
end if;
Check_Too_Long (Internal);
if Is_Imported (Def_Id) or else Is_Exported (Def_Id) then
Error_Pragma_Arg
("cannot use pragma% for imported/exported object",
Internal);
end if;
if Is_Concurrent_Type (Etype (Internal)) then
Error_Pragma_Arg
("cannot specify pragma % for task/protected object",
Internal);
end if;
if Has_Rep_Pragma (Def_Id, Name_Common_Object)
or else
Has_Rep_Pragma (Def_Id, Name_Psect_Object)
then
Error_Msg_N ("?duplicate Common/Psect_Object pragma", N);
end if;
if Ekind (Def_Id) = E_Constant then
Error_Pragma_Arg
("cannot specify pragma % for a constant", Internal);
end if;
if Is_Record_Type (Etype (Internal)) then
declare
Ent : Entity_Id;
Decl : Entity_Id;
begin
Ent := First_Entity (Etype (Internal));
while Present (Ent) loop
Decl := Declaration_Node (Ent);
if Ekind (Ent) = E_Component
and then Nkind (Decl) = N_Component_Declaration
and then Present (Expression (Decl))
and then Warn_On_Export_Import
then
Error_Msg_N
("?object for pragma % has defaults", Internal);
exit;
else
Next_Entity (Ent);
end if;
end loop;
end;
end if;
if Present (Size) then
Check_Too_Long (Size);
end if;
if Present (External) then
Check_Arg_Is_External_Name (External);
Check_Too_Long (External);
end if;
-- If all error tests pass, link pragma on to the rep item chain
Record_Rep_Item (Def_Id, N);
end Psect_Object;
----------
-- Pure --
----------
-- pragma Pure [(library_unit_NAME)];
when Pragma_Pure => Pure : declare
Ent : Entity_Id;
begin
Check_Ada_83_Warning;
Check_Valid_Library_Unit_Pragma;
if Nkind (N) = N_Null_Statement then
return;
end if;
Ent := Find_Lib_Unit_Name;
Set_Is_Pure (Ent);
Set_Has_Pragma_Pure (Ent);
Set_Suppress_Elaboration_Warnings (Ent);
end Pure;
-------------
-- Pure_05 --
-------------
-- pragma Pure_05 [(library_unit_NAME)];
-- This pragma is useable only in GNAT_Mode, where it is used like
-- pragma Pure but it is only effective in Ada 2005 mode (otherwise
-- it is ignored). It may be used after a pragma Preelaborate, in
-- which case it overrides the effect of the pragma Preelaborate.
-- This is used to implement AI-362 which recategorizes some run-time
-- packages in Ada 2005 mode.
when Pragma_Pure_05 => Pure_05 : declare
Ent : Entity_Id;
begin
GNAT_Pragma;
Check_Valid_Library_Unit_Pragma;
if not GNAT_Mode then
Error_Pragma ("pragma% only available in GNAT mode");
end if;
if Nkind (N) = N_Null_Statement then
return;
end if;
-- This is one of the few cases where we need to test the value of
-- Ada_Version_Explicit rather than Ada_Version (which is always
-- set to Ada_05 in a predefined unit), we need to know the
-- explicit version set to know if this pragma is active.
if Ada_Version_Explicit >= Ada_05 then
Ent := Find_Lib_Unit_Name;
Set_Is_Preelaborated (Ent, False);
Set_Is_Pure (Ent);
Set_Suppress_Elaboration_Warnings (Ent);
end if;
end Pure_05;
-------------------
-- Pure_Function --
-------------------
-- pragma Pure_Function ([Entity =>] function_LOCAL_NAME);
when Pragma_Pure_Function => Pure_Function : declare
E_Id : Node_Id;
E : Entity_Id;
Def_Id : Entity_Id;
Effective : Boolean := False;
begin
GNAT_Pragma;
Check_Arg_Count (1);
Check_Optional_Identifier (Arg1, Name_Entity);
Check_Arg_Is_Local_Name (Arg1);
E_Id := Expression (Arg1);
if Error_Posted (E_Id) then
return;
end if;
-- Loop through homonyms (overloadings) of referenced entity
E := Entity (E_Id);
if Present (E) then
loop
Def_Id := Get_Base_Subprogram (E);
if Ekind (Def_Id) /= E_Function
and then Ekind (Def_Id) /= E_Generic_Function
and then Ekind (Def_Id) /= E_Operator
then
Error_Pragma_Arg
("pragma% requires a function name", Arg1);
end if;
Set_Is_Pure (Def_Id);
if not Has_Pragma_Pure_Function (Def_Id) then
Set_Has_Pragma_Pure_Function (Def_Id);
Effective := True;
end if;
E := Homonym (E);
exit when No (E) or else Scope (E) /= Current_Scope;
end loop;
if not Effective
and then Warn_On_Redundant_Constructs
then
Error_Msg_NE ("pragma Pure_Function on& is redundant?",
N, Entity (E_Id));
end if;
end if;
end Pure_Function;
--------------------
-- Queuing_Policy --
--------------------
-- pragma Queuing_Policy (policy_IDENTIFIER);
when Pragma_Queuing_Policy => declare
QP : Character;
begin
Check_Ada_83_Warning;
Check_Arg_Count (1);
Check_No_Identifiers;
Check_Arg_Is_Queuing_Policy (Arg1);
Check_Valid_Configuration_Pragma;
Get_Name_String (Chars (Expression (Arg1)));
QP := Fold_Upper (Name_Buffer (1));
if Queuing_Policy /= ' '
and then Queuing_Policy /= QP
then
Error_Msg_Sloc := Queuing_Policy_Sloc;
Error_Pragma ("queuing policy incompatible with policy#");
-- Set new policy, but always preserve System_Location since
-- we like the error message with the run time name.
else
Queuing_Policy := QP;
if Queuing_Policy_Sloc /= System_Location then
Queuing_Policy_Sloc := Loc;
end if;
end if;
end;
---------------------------
-- Remote_Call_Interface --
---------------------------
-- pragma Remote_Call_Interface [(library_unit_NAME)];
when Pragma_Remote_Call_Interface => Remote_Call_Interface : declare
Cunit_Node : Node_Id;
Cunit_Ent : Entity_Id;
K : Node_Kind;
begin
Check_Ada_83_Warning;
Check_Valid_Library_Unit_Pragma;
if Nkind (N) = N_Null_Statement then
return;
end if;
Cunit_Node := Cunit (Current_Sem_Unit);
K := Nkind (Unit (Cunit_Node));
Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
if K = N_Package_Declaration
or else K = N_Generic_Package_Declaration
or else K = N_Subprogram_Declaration
or else K = N_Generic_Subprogram_Declaration
or else (K = N_Subprogram_Body
and then Acts_As_Spec (Unit (Cunit_Node)))
then
null;
else
Error_Pragma (
"pragma% must apply to package or subprogram declaration");
end if;
Set_Is_Remote_Call_Interface (Cunit_Ent);
end Remote_Call_Interface;
------------------
-- Remote_Types --
------------------
-- pragma Remote_Types [(library_unit_NAME)];
when Pragma_Remote_Types => Remote_Types : declare
Cunit_Node : Node_Id;
Cunit_Ent : Entity_Id;
begin
Check_Ada_83_Warning;
Check_Valid_Library_Unit_Pragma;
if Nkind (N) = N_Null_Statement then
return;
end if;
Cunit_Node := Cunit (Current_Sem_Unit);
Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
if Nkind (Unit (Cunit_Node)) /= N_Package_Declaration
and then
Nkind (Unit (Cunit_Node)) /= N_Generic_Package_Declaration
then
Error_Pragma (
"pragma% can only apply to a package declaration");
end if;
Set_Is_Remote_Types (Cunit_Ent);
end Remote_Types;
---------------
-- Ravenscar --
---------------
-- pragma Ravenscar;
when Pragma_Ravenscar =>
GNAT_Pragma;
Check_Arg_Count (0);
Check_Valid_Configuration_Pragma;
Set_Ravenscar_Profile (N);
if Warn_On_Obsolescent_Feature then
Error_Msg_N
("pragma Ravenscar is an obsolescent feature?", N);
Error_Msg_N
("|use pragma Profile (Ravenscar) instead", N);
end if;
-------------------------
-- Restricted_Run_Time --
-------------------------
-- pragma Restricted_Run_Time;
when Pragma_Restricted_Run_Time =>
GNAT_Pragma;
Check_Arg_Count (0);
Check_Valid_Configuration_Pragma;
Set_Profile_Restrictions (Restricted, N, Warn => False);
if Warn_On_Obsolescent_Feature then
Error_Msg_N
("pragma Restricted_Run_Time is an obsolescent feature?", N);
Error_Msg_N
("|use pragma Profile (Restricted) instead", N);
end if;
------------------
-- Restrictions --
------------------
-- pragma Restrictions (RESTRICTION {, RESTRICTION});
-- RESTRICTION ::=
-- restriction_IDENTIFIER
-- | restriction_parameter_IDENTIFIER => EXPRESSION
when Pragma_Restrictions =>
Process_Restrictions_Or_Restriction_Warnings;
--------------------------
-- Restriction_Warnings --
--------------------------
-- pragma Restriction_Warnings (RESTRICTION {, RESTRICTION});
-- RESTRICTION ::=
-- restriction_IDENTIFIER
-- | restriction_parameter_IDENTIFIER => EXPRESSION
when Pragma_Restriction_Warnings =>
Process_Restrictions_Or_Restriction_Warnings;
----------------
-- Reviewable --
----------------
-- pragma Reviewable;
when Pragma_Reviewable =>
Check_Ada_83_Warning;
Check_Arg_Count (0);
-------------------
-- Share_Generic --
-------------------
-- pragma Share_Generic (NAME {, NAME});
when Pragma_Share_Generic =>
GNAT_Pragma;
Process_Generic_List;
------------
-- Shared --
------------
-- pragma Shared (LOCAL_NAME);
when Pragma_Shared =>
GNAT_Pragma;
Process_Atomic_Shared_Volatile;
--------------------
-- Shared_Passive --
--------------------
-- pragma Shared_Passive [(library_unit_NAME)];
-- Set the flag Is_Shared_Passive of program unit name entity
when Pragma_Shared_Passive => Shared_Passive : declare
Cunit_Node : Node_Id;
Cunit_Ent : Entity_Id;
begin
Check_Ada_83_Warning;
Check_Valid_Library_Unit_Pragma;
if Nkind (N) = N_Null_Statement then
return;
end if;
Cunit_Node := Cunit (Current_Sem_Unit);
Cunit_Ent := Cunit_Entity (Current_Sem_Unit);
if Nkind (Unit (Cunit_Node)) /= N_Package_Declaration
and then
Nkind (Unit (Cunit_Node)) /= N_Generic_Package_Declaration
then
Error_Pragma (
"pragma% can only apply to a package declaration");
end if;
Set_Is_Shared_Passive (Cunit_Ent);
end Shared_Passive;
----------------------
-- Source_File_Name --
----------------------
-- There are five forms for this pragma:
-- pragma Source_File_Name (
-- [UNIT_NAME =>] unit_NAME,
-- BODY_FILE_NAME => STRING_LITERAL
-- [, [INDEX =>] INTEGER_LITERAL]);
-- pragma Source_File_Name (
-- [UNIT_NAME =>] unit_NAME,
-- SPEC_FILE_NAME => STRING_LITERAL
-- [, [INDEX =>] INTEGER_LITERAL]);
-- pragma Source_File_Name (
-- BODY_FILE_NAME => STRING_LITERAL
-- [, DOT_REPLACEMENT => STRING_LITERAL]
-- [, CASING => CASING_SPEC]);
-- pragma Source_File_Name (
-- SPEC_FILE_NAME => STRING_LITERAL
-- [, DOT_REPLACEMENT => STRING_LITERAL]
-- [, CASING => CASING_SPEC]);
-- pragma Source_File_Name (
-- SUBUNIT_FILE_NAME => STRING_LITERAL
-- [, DOT_REPLACEMENT => STRING_LITERAL]
-- [, CASING => CASING_SPEC]);
-- CASING_SPEC ::= Uppercase | Lowercase | Mixedcase
-- Pragma Source_File_Name_Project (SFNP) is equivalent to pragma
-- Source_File_Name (SFN), however their usage is exclusive:
-- SFN can only be used when no project file is used, while
-- SFNP can only be used when a project file is used.
-- No processing here. Processing was completed during parsing,
-- since we need to have file names set as early as possible.
-- Units are loaded well before semantic processing starts.
-- The only processing we defer to this point is the check
-- for correct placement.
when Pragma_Source_File_Name =>
GNAT_Pragma;
Check_Valid_Configuration_Pragma;
------------------------------
-- Source_File_Name_Project --
------------------------------
-- See Source_File_Name for syntax
-- No processing here. Processing was completed during parsing,
-- since we need to have file names set as early as possible.
-- Units are loaded well before semantic processing starts.
-- The only processing we defer to this point is the check
-- for correct placement.
when Pragma_Source_File_Name_Project =>
GNAT_Pragma;
Check_Valid_Configuration_Pragma;
-- Check that a pragma Source_File_Name_Project is used only
-- in a configuration pragmas file.
-- Pragmas Source_File_Name_Project should only be generated
-- by the Project Manager in configuration pragmas files.
-- This is really an ugly test. It seems to depend on some
-- accidental and undocumented property. At the very least
-- it needs to be documented, but it would be better to have
-- a clean way of testing if we are in a configuration file???
if Present (Parent (N)) then
Error_Pragma
("pragma% can only appear in a configuration pragmas file");
end if;
----------------------
-- Source_Reference --
----------------------
-- pragma Source_Reference (INTEGER_LITERAL [, STRING_LITERAL]);
-- Nothing to do, all processing completed in Par.Prag, since we
-- need the information for possible parser messages that are output
when Pragma_Source_Reference =>
GNAT_Pragma;
------------------
-- Storage_Size --
------------------
-- pragma Storage_Size (EXPRESSION);
when Pragma_Storage_Size => Storage_Size : declare
P : constant Node_Id := Parent (N);
Arg : Node_Id;
begin
Check_No_Identifiers;
Check_Arg_Count (1);
-- The expression must be analyzed in the special manner
-- described in "Handling of Default Expressions" in sem.ads.
-- Set In_Default_Expression for per-object case ???
Arg := Expression (Arg1);
Analyze_Per_Use_Expression (Arg, Any_Integer);
if not Is_Static_Expression (Arg) then
Check_Restriction (Static_Storage_Size, Arg);
end if;
if Nkind (P) /= N_Task_Definition then
Pragma_Misplaced;
return;
else
if Has_Storage_Size_Pragma (P) then
Error_Pragma ("duplicate pragma% not allowed");
else
Set_Has_Storage_Size_Pragma (P, True);
end if;
Record_Rep_Item (Defining_Identifier (Parent (P)), N);
-- ??? exp_ch9 should use this!
end if;
end Storage_Size;
------------------
-- Storage_Unit --
------------------
-- pragma Storage_Unit (NUMERIC_LITERAL);
-- Only permitted argument is System'Storage_Unit value
when Pragma_Storage_Unit =>
Check_No_Identifiers;
Check_Arg_Count (1);
Check_Arg_Is_Integer_Literal (Arg1);
if Intval (Expression (Arg1)) /=
UI_From_Int (Ttypes.System_Storage_Unit)
then
Error_Msg_Uint_1 := UI_From_Int (Ttypes.System_Storage_Unit);
Error_Pragma_Arg
("the only allowed argument for pragma% is ^", Arg1);
end if;
--------------------
-- Stream_Convert --
--------------------
-- pragma Stream_Convert (
-- [Entity =>] type_LOCAL_NAME,
-- [Read =>] function_NAME,
-- [Write =>] function NAME);
when Pragma_Stream_Convert => Stream_Convert : declare
procedure Check_OK_Stream_Convert_Function (Arg : Node_Id);
-- Check that the given argument is the name of a local
-- function of one argument that is not overloaded earlier
-- in the current local scope. A check is also made that the
-- argument is a function with one parameter.
--------------------------------------
-- Check_OK_Stream_Convert_Function --
--------------------------------------
procedure Check_OK_Stream_Convert_Function (Arg : Node_Id) is
Ent : Entity_Id;
begin
Check_Arg_Is_Local_Name (Arg);
Ent := Entity (Expression (Arg));
if Has_Homonym (Ent) then
Error_Pragma_Arg
("argument for pragma% may not be overloaded", Arg);
end if;
if Ekind (Ent) /= E_Function
or else No (First_Formal (Ent))
or else Present (Next_Formal (First_Formal (Ent)))
then
Error_Pragma_Arg
("argument for pragma% must be" &
" function of one argument", Arg);
end if;
end Check_OK_Stream_Convert_Function;
-- Start of procecessing for Stream_Convert
begin
GNAT_Pragma;
Check_Arg_Order ((Name_Entity, Name_Read, Name_Write));
Check_Arg_Count (3);
Check_Optional_Identifier (Arg1, Name_Entity);
Check_Optional_Identifier (Arg2, Name_Read);
Check_Optional_Identifier (Arg3, Name_Write);
Check_Arg_Is_Local_Name (Arg1);
Check_OK_Stream_Convert_Function (Arg2);
Check_OK_Stream_Convert_Function (Arg3);
declare
Typ : constant Entity_Id :=
Underlying_Type (Entity (Expression (Arg1)));
Read : constant Entity_Id := Entity (Expression (Arg2));
Write : constant Entity_Id := Entity (Expression (Arg3));
begin
if Etype (Typ) = Any_Type
or else
Etype (Read) = Any_Type
or else
Etype (Write) = Any_Type
then
return;
end if;
Check_First_Subtype (Arg1);
if Rep_Item_Too_Early (Typ, N)
or else
Rep_Item_Too_Late (Typ, N)
then
return;
end if;
if Underlying_Type (Etype (Read)) /= Typ then
Error_Pragma_Arg
("incorrect return type for function&", Arg2);
end if;
if Underlying_Type (Etype (First_Formal (Write))) /= Typ then
Error_Pragma_Arg
("incorrect parameter type for function&", Arg3);
end if;
if Underlying_Type (Etype (First_Formal (Read))) /=
Underlying_Type (Etype (Write))
then
Error_Pragma_Arg
("result type of & does not match Read parameter type",
Arg3);
end if;
end;
end Stream_Convert;
-------------------------
-- Style_Checks (GNAT) --
-------------------------
-- pragma Style_Checks (On | Off | ALL_CHECKS | STRING_LITERAL);
-- This is processed by the parser since some of the style
-- checks take place during source scanning and parsing. This
-- means that we don't need to issue error messages here.
when Pragma_Style_Checks => Style_Checks : declare
A : constant Node_Id := Expression (Arg1);
S : String_Id;
C : Char_Code;
begin
GNAT_Pragma;
Check_No_Identifiers;
-- Two argument form
if Arg_Count = 2 then
Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
declare
E_Id : Node_Id;
E : Entity_Id;
begin
E_Id := Expression (Arg2);
Analyze (E_Id);
if not Is_Entity_Name (E_Id) then
Error_Pragma_Arg
("second argument of pragma% must be entity name",
Arg2);
end if;
E := Entity (E_Id);
if E = Any_Id then
return;
else
loop
Set_Suppress_Style_Checks (E,
(Chars (Expression (Arg1)) = Name_Off));
exit when No (Homonym (E));
E := Homonym (E);
end loop;
end if;
end;
-- One argument form
else
Check_Arg_Count (1);
if Nkind (A) = N_String_Literal then
S := Strval (A);
declare
Slen : constant Natural := Natural (String_Length (S));
Options : String (1 .. Slen);
J : Natural;
begin
J := 1;
loop
C := Get_String_Char (S, Int (J));
exit when not In_Character_Range (C);
Options (J) := Get_Character (C);
-- If at end of string, set options. As per discussion
-- above, no need to check for errors, since we issued
-- them in the parser.
if J = Slen then
Set_Style_Check_Options (Options);
exit;
end if;
J := J + 1;
end loop;
end;
elsif Nkind (A) = N_Identifier then
if Chars (A) = Name_All_Checks then
Set_Default_Style_Check_Options;
elsif Chars (A) = Name_On then
Style_Check := True;
elsif Chars (A) = Name_Off then
Style_Check := False;
end if;
end if;
end if;
end Style_Checks;
--------------
-- Subtitle --
--------------
-- pragma Subtitle ([Subtitle =>] STRING_LITERAL);
when Pragma_Subtitle =>
GNAT_Pragma;
Check_Arg_Count (1);
Check_Optional_Identifier (Arg1, Name_Subtitle);
Check_Arg_Is_String_Literal (Arg1);
--------------
-- Suppress --
--------------
-- pragma Suppress (IDENTIFIER [, [On =>] NAME]);
when Pragma_Suppress =>
Process_Suppress_Unsuppress (True);
------------------
-- Suppress_All --
------------------
-- pragma Suppress_All;
-- The only check made here is that the pragma appears in the
-- proper place, i.e. following a compilation unit. If indeed
-- it appears in this context, then the parser has already
-- inserted an equivalent pragma Suppress (All_Checks) to get
-- the required effect.
when Pragma_Suppress_All =>
GNAT_Pragma;
Check_Arg_Count (0);
if Nkind (Parent (N)) /= N_Compilation_Unit_Aux
or else not Is_List_Member (N)
or else List_Containing (N) /= Pragmas_After (Parent (N))
then
Error_Pragma
("misplaced pragma%, must follow compilation unit");
end if;
-------------------------
-- Suppress_Debug_Info --
-------------------------
-- pragma Suppress_Debug_Info ([Entity =>] LOCAL_NAME);
when Pragma_Suppress_Debug_Info =>
GNAT_Pragma;
Check_Arg_Count (1);
Check_Optional_Identifier (Arg1, Name_Entity);
Check_Arg_Is_Local_Name (Arg1);
Set_Debug_Info_Off (Entity (Get_Pragma_Arg (Arg1)));
----------------------------------
-- Suppress_Exception_Locations --
----------------------------------
-- pragma Suppress_Exception_Locations;
when Pragma_Suppress_Exception_Locations =>
GNAT_Pragma;
Check_Arg_Count (0);
Check_Valid_Configuration_Pragma;
Exception_Locations_Suppressed := True;
-----------------------------
-- Suppress_Initialization --
-----------------------------
-- pragma Suppress_Initialization ([Entity =>] type_Name);
when Pragma_Suppress_Initialization => Suppress_Init : declare
E_Id : Node_Id;
E : Entity_Id;
begin
GNAT_Pragma;
Check_Arg_Count (1);
Check_Optional_Identifier (Arg1, Name_Entity);
Check_Arg_Is_Local_Name (Arg1);
E_Id := Expression (Arg1);
if Etype (E_Id) = Any_Type then
return;
end if;
E := Entity (E_Id);
if Is_Type (E) then
if Is_Incomplete_Or_Private_Type (E) then
if No (Full_View (Base_Type (E))) then
Error_Pragma_Arg
("argument of pragma% cannot be an incomplete type",
Arg1);
else
Set_Suppress_Init_Proc (Full_View (Base_Type (E)));
end if;
else
Set_Suppress_Init_Proc (Base_Type (E));
end if;
else
Error_Pragma_Arg
("pragma% requires argument that is a type name", Arg1);
end if;
end Suppress_Init;
-----------------
-- System_Name --
-----------------
-- pragma System_Name (DIRECT_NAME);
-- Syntax check: one argument, which must be the identifier GNAT
-- or the identifier GCC, no other identifiers are acceptable.
when Pragma_System_Name =>
Check_No_Identifiers;
Check_Arg_Count (1);
Check_Arg_Is_One_Of (Arg1, Name_Gcc, Name_Gnat);
-----------------------------
-- Task_Dispatching_Policy --
-----------------------------
-- pragma Task_Dispatching_Policy (policy_IDENTIFIER);
when Pragma_Task_Dispatching_Policy => declare
DP : Character;
begin
Check_Ada_83_Warning;
Check_Arg_Count (1);
Check_No_Identifiers;
Check_Arg_Is_Task_Dispatching_Policy (Arg1);
Check_Valid_Configuration_Pragma;
Get_Name_String (Chars (Expression (Arg1)));
DP := Fold_Upper (Name_Buffer (1));
if Task_Dispatching_Policy /= ' '
and then Task_Dispatching_Policy /= DP
then
Error_Msg_Sloc := Task_Dispatching_Policy_Sloc;
Error_Pragma
("task dispatching policy incompatible with policy#");
-- Set new policy, but always preserve System_Location since
-- we like the error message with the run time name.
else
Task_Dispatching_Policy := DP;
if Task_Dispatching_Policy_Sloc /= System_Location then
Task_Dispatching_Policy_Sloc := Loc;
end if;
end if;
end;
--------------
-- Task_Info --
--------------
-- pragma Task_Info (EXPRESSION);
when Pragma_Task_Info => Task_Info : declare
P : constant Node_Id := Parent (N);
begin
GNAT_Pragma;
if Nkind (P) /= N_Task_Definition then
Error_Pragma ("pragma% must appear in task definition");
end if;
Check_No_Identifiers;
Check_Arg_Count (1);
Analyze_And_Resolve (Expression (Arg1), RTE (RE_Task_Info_Type));
if Etype (Expression (Arg1)) = Any_Type then
return;
end if;
if Has_Task_Info_Pragma (P) then
Error_Pragma ("duplicate pragma% not allowed");
else
Set_Has_Task_Info_Pragma (P, True);
end if;
end Task_Info;
---------------
-- Task_Name --
---------------
-- pragma Task_Name (string_EXPRESSION);
when Pragma_Task_Name => Task_Name : declare
-- pragma Priority (EXPRESSION);
P : constant Node_Id := Parent (N);
Arg : Node_Id;
begin
Check_No_Identifiers;
Check_Arg_Count (1);
Arg := Expression (Arg1);
Analyze_And_Resolve (Arg, Standard_String);
if Nkind (P) /= N_Task_Definition then
Pragma_Misplaced;
end if;
if Has_Task_Name_Pragma (P) then
Error_Pragma ("duplicate pragma% not allowed");
else
Set_Has_Task_Name_Pragma (P, True);
Record_Rep_Item (Defining_Identifier (Parent (P)), N);
end if;
end Task_Name;
------------------
-- Task_Storage --
------------------
-- pragma Task_Storage (
-- [Task_Type =>] LOCAL_NAME,
-- [Top_Guard =>] static_integer_EXPRESSION);
when Pragma_Task_Storage => Task_Storage : declare
Args : Args_List (1 .. 2);
Names : constant Name_List (1 .. 2) := (
Name_Task_Type,
Name_Top_Guard);
Task_Type : Node_Id renames Args (1);
Top_Guard : Node_Id renames Args (2);
Ent : Entity_Id;
begin
GNAT_Pragma;
Gather_Associations (Names, Args);
if No (Task_Type) then
Error_Pragma
("missing task_type argument for pragma%");
end if;
Check_Arg_Is_Local_Name (Task_Type);
Ent := Entity (Task_Type);
if not Is_Task_Type (Ent) then
Error_Pragma_Arg
("argument for pragma% must be task type", Task_Type);
end if;
if No (Top_Guard) then
Error_Pragma_Arg
("pragma% takes two arguments", Task_Type);
else
Check_Arg_Is_Static_Expression (Top_Guard, Any_Integer);
end if;
Check_First_Subtype (Task_Type);
if Rep_Item_Too_Late (Ent, N) then
raise Pragma_Exit;
end if;
end Task_Storage;
-----------------
-- Thread_Body --
-----------------
-- pragma Thread_Body
-- ( [Entity =>] LOCAL_NAME
-- [,[Secondary_Stack_Size =>] static_integer_EXPRESSION]);
when Pragma_Thread_Body => Thread_Body : declare
Id : Node_Id;
SS : Node_Id;
E : Entity_Id;
begin
GNAT_Pragma;
Check_Arg_Order ((Name_Entity, Name_Secondary_Stack_Size));
Check_At_Least_N_Arguments (1);
Check_At_Most_N_Arguments (2);
Check_Optional_Identifier (Arg1, Name_Entity);
Check_Arg_Is_Local_Name (Arg1);
Id := Expression (Arg1);
if not Is_Entity_Name (Id)
or else not Is_Subprogram (Entity (Id))
then
Error_Pragma_Arg ("subprogram name required", Arg1);
end if;
E := Entity (Id);
-- Go to renamed subprogram if present, since Thread_Body applies
-- to the actual renamed entity, not to the renaming entity.
if Present (Alias (E))
and then Nkind (Parent (Declaration_Node (E))) =
N_Subprogram_Renaming_Declaration
then
E := Alias (E);
end if;
-- Various error checks
if Nkind (Parent (Declaration_Node (E))) = N_Subprogram_Body then
Error_Pragma
("pragma% requires separate spec and must come before body");
elsif Rep_Item_Too_Early (E, N)
or else Rep_Item_Too_Late (E, N)
then
raise Pragma_Exit;
elsif Is_Thread_Body (E) then
Error_Pragma_Arg
("only one thread body pragma allowed", Arg1);
elsif Present (Homonym (E))
and then Scope (Homonym (E)) = Current_Scope
then
Error_Pragma_Arg
("thread body subprogram must not be overloaded", Arg1);
end if;
Set_Is_Thread_Body (E);
-- Deal with secondary stack argument
if Arg_Count = 2 then
Check_Optional_Identifier (Arg2, Name_Secondary_Stack_Size);
SS := Expression (Arg2);
Analyze_And_Resolve (SS, Any_Integer);
end if;
end Thread_Body;
----------------
-- Time_Slice --
----------------
-- pragma Time_Slice (static_duration_EXPRESSION);
when Pragma_Time_Slice => Time_Slice : declare
Val : Ureal;
Nod : Node_Id;
begin
GNAT_Pragma;
Check_Arg_Count (1);
Check_No_Identifiers;
Check_In_Main_Program;
Check_Arg_Is_Static_Expression (Arg1, Standard_Duration);
if not Error_Posted (Arg1) then
Nod := Next (N);
while Present (Nod) loop
if Nkind (Nod) = N_Pragma
and then Chars (Nod) = Name_Time_Slice
then
Error_Msg_Name_1 := Chars (N);
Error_Msg_N ("duplicate pragma% not permitted", Nod);
end if;
Next (Nod);
end loop;
end if;
-- Process only if in main unit
if Get_Source_Unit (Loc) = Main_Unit then
Opt.Time_Slice_Set := True;
Val := Expr_Value_R (Expression (Arg1));
if Val <= Ureal_0 then
Opt.Time_Slice_Value := 0;
elsif Val > UR_From_Uint (UI_From_Int (1000)) then
Opt.Time_Slice_Value := 1_000_000_000;
else
Opt.Time_Slice_Value :=
UI_To_Int (UR_To_Uint (Val * UI_From_Int (1_000_000)));
end if;
end if;
end Time_Slice;
-----------
-- Title --
-----------
-- pragma Title (TITLING_OPTION [, TITLING OPTION]);
-- TITLING_OPTION ::=
-- [Title =>] STRING_LITERAL
-- | [Subtitle =>] STRING_LITERAL
when Pragma_Title => Title : declare
Args : Args_List (1 .. 2);
Names : constant Name_List (1 .. 2) := (
Name_Title,
Name_Subtitle);
begin
GNAT_Pragma;
Gather_Associations (Names, Args);
for J in 1 .. 2 loop
if Present (Args (J)) then
Check_Arg_Is_String_Literal (Args (J));
end if;
end loop;
end Title;
---------------------
-- Unchecked_Union --
---------------------
-- pragma Unchecked_Union (first_subtype_LOCAL_NAME)
when Pragma_Unchecked_Union => Unchecked_Union : declare
Assoc : constant Node_Id := Arg1;
Type_Id : constant Node_Id := Expression (Assoc);
Typ : Entity_Id;
Discr : Entity_Id;
Tdef : Node_Id;
Clist : Node_Id;
Vpart : Node_Id;
Comp : Node_Id;
Variant : Node_Id;
begin
GNAT_Pragma;
Check_No_Identifiers;
Check_Arg_Count (1);
Check_Arg_Is_Local_Name (Arg1);
Find_Type (Type_Id);
Typ := Entity (Type_Id);
if Typ = Any_Type
or else Rep_Item_Too_Early (Typ, N)
then
return;
else
Typ := Underlying_Type (Typ);
end if;
if Rep_Item_Too_Late (Typ, N) then
return;
end if;
Check_First_Subtype (Arg1);
-- Note remaining cases are references to a type in the current
-- declarative part. If we find an error, we post the error on
-- the relevant type declaration at an appropriate point.
if not Is_Record_Type (Typ) then
Error_Msg_N ("Unchecked_Union must be record type", Typ);
return;
elsif Is_Tagged_Type (Typ) then
Error_Msg_N ("Unchecked_Union must not be tagged", Typ);
return;
elsif Is_Limited_Type (Typ) then
Error_Msg_N
("Unchecked_Union must not be limited record type", Typ);
Explain_Limited_Type (Typ, Typ);
return;
else
if not Has_Discriminants (Typ) then
Error_Msg_N
("Unchecked_Union must have one discriminant", Typ);
return;
end if;
Discr := First_Discriminant (Typ);
while Present (Discr) loop
if No (Discriminant_Default_Value (Discr)) then
Error_Msg_N
("Unchecked_Union discriminant must have default value",
Discr);
end if;
Next_Discriminant (Discr);
end loop;
Tdef := Type_Definition (Declaration_Node (Typ));
Clist := Component_List (Tdef);
Comp := First (Component_Items (Clist));
while Present (Comp) loop
Check_Component (Comp);
Next (Comp);
end loop;
if No (Clist) or else No (Variant_Part (Clist)) then
Error_Msg_N
("Unchecked_Union must have variant part",
Tdef);
return;
end if;
Vpart := Variant_Part (Clist);
Variant := First (Variants (Vpart));
while Present (Variant) loop
Check_Variant (Variant);
Next (Variant);
end loop;
end if;
Set_Is_Unchecked_Union (Typ, True);
Set_Convention (Typ, Convention_C);
Set_Has_Unchecked_Union (Base_Type (Typ), True);
Set_Is_Unchecked_Union (Base_Type (Typ), True);
end Unchecked_Union;
------------------------
-- Unimplemented_Unit --
------------------------
-- pragma Unimplemented_Unit;
-- Note: this only gives an error if we are generating code,
-- or if we are in a generic library unit (where the pragma
-- appears in the body, not in the spec).
when Pragma_Unimplemented_Unit => Unimplemented_Unit : declare
Cunitent : constant Entity_Id :=
Cunit_Entity (Get_Source_Unit (Loc));
Ent_Kind : constant Entity_Kind :=
Ekind (Cunitent);
begin
GNAT_Pragma;
Check_Arg_Count (0);
if Operating_Mode = Generate_Code
or else Ent_Kind = E_Generic_Function
or else Ent_Kind = E_Generic_Procedure
or else Ent_Kind = E_Generic_Package
then
Get_Name_String (Chars (Cunitent));
Set_Casing (Mixed_Case);
Write_Str (Name_Buffer (1 .. Name_Len));
Write_Str (" is not implemented");
Write_Eol;
raise Unrecoverable_Error;
end if;
end Unimplemented_Unit;
--------------------
-- Universal_Data --
--------------------
-- pragma Universal_Data [(library_unit_NAME)];
when Pragma_Universal_Data =>
GNAT_Pragma;
-- If this is a configuration pragma, then set the universal
-- addressing option, otherwise confirm that the pragma
-- satisfies the requirements of library unit pragma placement
-- and leave it to the GNAAMP back end to detect the pragma
-- (avoids transitive setting of the option due to withed units).
if Is_Configuration_Pragma then
Universal_Addressing_On_AAMP := True;
else
Check_Valid_Library_Unit_Pragma;
end if;
if not AAMP_On_Target then
Error_Pragma ("?pragma% ignored (applies only to AAMP)");
end if;
------------------
-- Unreferenced --
------------------
-- pragma Unreferenced (local_Name {, local_Name});
when Pragma_Unreferenced => Unreferenced : declare
Arg_Node : Node_Id;
Arg_Expr : Node_Id;
Arg_Ent : Entity_Id;
begin
GNAT_Pragma;
Check_At_Least_N_Arguments (1);
Arg_Node := Arg1;
while Present (Arg_Node) loop
Check_No_Identifier (Arg_Node);
-- Note that the analyze call done by Check_Arg_Is_Local_Name
-- will in fact generate a reference, so that the entity will
-- have a reference, which will inhibit any warnings about it
-- not being referenced, and also properly show up in the ali
-- file as a reference. But this reference is recorded before
-- the Has_Pragma_Unreferenced flag is set, so that no warning
-- is generated for this reference.
Check_Arg_Is_Local_Name (Arg_Node);
Arg_Expr := Get_Pragma_Arg (Arg_Node);
if Is_Entity_Name (Arg_Expr) then
Arg_Ent := Entity (Arg_Expr);
-- If the entity is overloaded, the pragma applies to the
-- most recent overloading, as documented. In this case,
-- name resolution does not generate a reference, so it
-- must be done here explicitly.
if Is_Overloaded (Arg_Expr) then
Generate_Reference (Arg_Ent, N);
end if;
Set_Has_Pragma_Unreferenced (Arg_Ent);
end if;
Next (Arg_Node);
end loop;
end Unreferenced;
------------------------------
-- Unreserve_All_Interrupts --
------------------------------
-- pragma Unreserve_All_Interrupts;
when Pragma_Unreserve_All_Interrupts =>
GNAT_Pragma;
Check_Arg_Count (0);
if In_Extended_Main_Code_Unit (Main_Unit_Entity) then
Unreserve_All_Interrupts := True;
end if;
----------------
-- Unsuppress --
----------------
-- pragma Unsuppress (IDENTIFIER [, [On =>] NAME]);
when Pragma_Unsuppress =>
GNAT_Pragma;
Process_Suppress_Unsuppress (False);
-------------------
-- Use_VADS_Size --
-------------------
-- pragma Use_VADS_Size;
when Pragma_Use_VADS_Size =>
GNAT_Pragma;
Check_Arg_Count (0);
Check_Valid_Configuration_Pragma;
Use_VADS_Size := True;
---------------------
-- Validity_Checks --
---------------------
-- pragma Validity_Checks (On | Off | ALL_CHECKS | STRING_LITERAL);
when Pragma_Validity_Checks => Validity_Checks : declare
A : constant Node_Id := Expression (Arg1);
S : String_Id;
C : Char_Code;
begin
GNAT_Pragma;
Check_Arg_Count (1);
Check_No_Identifiers;
if Nkind (A) = N_String_Literal then
S := Strval (A);
declare
Slen : constant Natural := Natural (String_Length (S));
Options : String (1 .. Slen);
J : Natural;
begin
J := 1;
loop
C := Get_String_Char (S, Int (J));
exit when not In_Character_Range (C);
Options (J) := Get_Character (C);
if J = Slen then
Set_Validity_Check_Options (Options);
exit;
else
J := J + 1;
end if;
end loop;
end;
elsif Nkind (A) = N_Identifier then
if Chars (A) = Name_All_Checks then
Set_Validity_Check_Options ("a");
elsif Chars (A) = Name_On then
Validity_Checks_On := True;
elsif Chars (A) = Name_Off then
Validity_Checks_On := False;
end if;
end if;
end Validity_Checks;
--------------
-- Volatile --
--------------
-- pragma Volatile (LOCAL_NAME);
when Pragma_Volatile =>
Process_Atomic_Shared_Volatile;
-------------------------
-- Volatile_Components --
-------------------------
-- pragma Volatile_Components (array_LOCAL_NAME);
-- Volatile is handled by the same circuit as Atomic_Components
--------------
-- Warnings --
--------------
-- pragma Warnings (On | Off, [LOCAL_NAME])
-- pragma Warnings (static_string_EXPRESSION);
when Pragma_Warnings => Warnings : begin
GNAT_Pragma;
Check_At_Least_N_Arguments (1);
Check_No_Identifiers;
-- One argument case
if Arg_Count = 1 then
declare
Argx : constant Node_Id := Get_Pragma_Arg (Arg1);
begin
-- On/Off one argument case was processed by parser
if Nkind (Argx) = N_Identifier
and then
(Chars (Argx) = Name_On
or else
Chars (Argx) = Name_Off)
then
null;
else
Check_Arg_Is_Static_Expression (Arg1, Standard_String);
declare
Lit : constant Node_Id := Expr_Value_S (Argx);
Str : constant String_Id := Strval (Lit);
C : Char_Code;
begin
for J in 1 .. String_Length (Str) loop
C := Get_String_Char (Str, J);
if In_Character_Range (C)
and then Set_Warning_Switch (Get_Character (C))
then
null;
else
Error_Pragma_Arg
("invalid warning switch character", Arg1);
end if;
end loop;
end;
end if;
end;
-- Two argument case
elsif Arg_Count /= 1 then
Check_Arg_Is_One_Of (Arg1, Name_On, Name_Off);
Check_Arg_Count (2);
declare
E_Id : Node_Id;
E : Entity_Id;
begin
E_Id := Expression (Arg2);
Analyze (E_Id);
-- In the expansion of an inlined body, a reference to
-- the formal may be wrapped in a conversion if the actual
-- is a conversion. Retrieve the real entity name.
if (In_Instance_Body
or else In_Inlined_Body)
and then Nkind (E_Id) = N_Unchecked_Type_Conversion
then
E_Id := Expression (E_Id);
end if;
if not Is_Entity_Name (E_Id) then
Error_Pragma_Arg
("second argument of pragma% must be entity name",
Arg2);
end if;
E := Entity (E_Id);
if E = Any_Id then
return;
else
loop
Set_Warnings_Off
(E, (Chars (Expression (Arg1)) = Name_Off));
if Is_Enumeration_Type (E) then
declare
Lit : Entity_Id;
begin
Lit := First_Literal (E);
while Present (Lit) loop
Set_Warnings_Off (Lit);
Next_Literal (Lit);
end loop;
end;
end if;
exit when No (Homonym (E));
E := Homonym (E);
end loop;
end if;
end;
-- More than two arguments
else
Check_At_Most_N_Arguments (2);
end if;
end Warnings;
-------------------
-- Weak_External --
-------------------
-- pragma Weak_External ([Entity =>] LOCAL_NAME);
when Pragma_Weak_External => Weak_External : declare
Ent : Entity_Id;
begin
GNAT_Pragma;
Check_Arg_Count (1);
Check_Optional_Identifier (Arg1, Name_Entity);
Check_Arg_Is_Library_Level_Local_Name (Arg1);
Ent := Entity (Expression (Arg1));
if Rep_Item_Too_Early (Ent, N) then
return;
else
Ent := Underlying_Type (Ent);
end if;
-- The only processing required is to link this item on to the
-- list of rep items for the given entity. This is accomplished
-- by the call to Rep_Item_Too_Late (when no error is detected
-- and False is returned).
if Rep_Item_Too_Late (Ent, N) then
return;
else
Set_Has_Gigi_Rep_Item (Ent);
end if;
end Weak_External;
--------------------
-- Unknown_Pragma --
--------------------
-- Should be impossible, since the case of an unknown pragma is
-- separately processed before the case statement is entered.
when Unknown_Pragma =>
raise Program_Error;
end case;
exception
when Pragma_Exit => null;
end Analyze_Pragma;
---------------------------------
-- Delay_Config_Pragma_Analyze --
---------------------------------
function Delay_Config_Pragma_Analyze (N : Node_Id) return Boolean is
begin
return Chars (N) = Name_Interrupt_State;
end Delay_Config_Pragma_Analyze;
-------------------------
-- Get_Base_Subprogram --
-------------------------
function Get_Base_Subprogram (Def_Id : Entity_Id) return Entity_Id is
Result : Entity_Id;
begin
-- Follow subprogram renaming chain
Result := Def_Id;
while Is_Subprogram (Result)
and then
(Is_Generic_Instance (Result)
or else Nkind (Parent (Declaration_Node (Result))) =
N_Subprogram_Renaming_Declaration)
and then Present (Alias (Result))
loop
Result := Alias (Result);
end loop;
return Result;
end Get_Base_Subprogram;
-----------------------------
-- Is_Config_Static_String --
-----------------------------
function Is_Config_Static_String (Arg : Node_Id) return Boolean is
function Add_Config_Static_String (Arg : Node_Id) return Boolean;
-- This is an internal recursive function that is just like the
-- outer function except that it adds the string to the name buffer
-- rather than placing the string in the name buffer.
------------------------------
-- Add_Config_Static_String --
------------------------------
function Add_Config_Static_String (Arg : Node_Id) return Boolean is
N : Node_Id;
C : Char_Code;
begin
N := Arg;
if Nkind (N) = N_Op_Concat then
if Add_Config_Static_String (Left_Opnd (N)) then
N := Right_Opnd (N);
else
return False;
end if;
end if;
if Nkind (N) /= N_String_Literal then
Error_Msg_N ("string literal expected for pragma argument", N);
return False;
else
for J in 1 .. String_Length (Strval (N)) loop
C := Get_String_Char (Strval (N), J);
if not In_Character_Range (C) then
Error_Msg
("string literal contains invalid wide character",
Sloc (N) + 1 + Source_Ptr (J));
return False;
end if;
Add_Char_To_Name_Buffer (Get_Character (C));
end loop;
end if;
return True;
end Add_Config_Static_String;
-- Start of prorcessing for Is_Config_Static_String
begin
Name_Len := 0;
return Add_Config_Static_String (Arg);
end Is_Config_Static_String;
-----------------------------------------
-- Is_Non_Significant_Pragma_Reference --
-----------------------------------------
-- This function makes use of the following static table which indicates
-- whether a given pragma is significant. A value of -1 in this table
-- indicates that the reference is significant. A value of zero indicates
-- than appearence as any argument is insignificant, a positive value
-- indicates that appearence in that parameter position is significant.
Sig_Flags : constant array (Pragma_Id) of Int :=
(Pragma_AST_Entry => -1,
Pragma_Abort_Defer => -1,
Pragma_Ada_83 => -1,
Pragma_Ada_95 => -1,
Pragma_Ada_05 => -1,
Pragma_Ada_2005 => -1,
Pragma_All_Calls_Remote => -1,
Pragma_Annotate => -1,
Pragma_Assert => -1,
Pragma_Assertion_Policy => 0,
Pragma_Asynchronous => -1,
Pragma_Atomic => 0,
Pragma_Atomic_Components => 0,
Pragma_Attach_Handler => -1,
Pragma_CPP_Class => 0,
Pragma_CPP_Constructor => 0,
Pragma_CPP_Virtual => 0,
Pragma_CPP_Vtable => 0,
Pragma_C_Pass_By_Copy => 0,
Pragma_Comment => 0,
Pragma_Common_Object => -1,
Pragma_Compile_Time_Warning => -1,
Pragma_Complete_Representation => 0,
Pragma_Complex_Representation => 0,
Pragma_Component_Alignment => -1,
Pragma_Controlled => 0,
Pragma_Convention => 0,
Pragma_Convention_Identifier => 0,
Pragma_Debug => -1,
Pragma_Debug_Policy => 0,
Pragma_Detect_Blocking => -1,
Pragma_Discard_Names => 0,
Pragma_Elaborate => -1,
Pragma_Elaborate_All => -1,
Pragma_Elaborate_Body => -1,
Pragma_Elaboration_Checks => -1,
Pragma_Eliminate => -1,
Pragma_Explicit_Overriding => -1,
Pragma_Export => -1,
Pragma_Export_Exception => -1,
Pragma_Export_Function => -1,
Pragma_Export_Object => -1,
Pragma_Export_Procedure => -1,
Pragma_Export_Value => -1,
Pragma_Export_Valued_Procedure => -1,
Pragma_Extend_System => -1,
Pragma_Extensions_Allowed => -1,
Pragma_External => -1,
Pragma_External_Name_Casing => -1,
Pragma_Finalize_Storage_Only => 0,
Pragma_Float_Representation => 0,
Pragma_Ident => -1,
Pragma_Import => +2,
Pragma_Import_Exception => 0,
Pragma_Import_Function => 0,
Pragma_Import_Object => 0,
Pragma_Import_Procedure => 0,
Pragma_Import_Valued_Procedure => 0,
Pragma_Initialize_Scalars => -1,
Pragma_Inline => 0,
Pragma_Inline_Always => 0,
Pragma_Inline_Generic => 0,
Pragma_Inspection_Point => -1,
Pragma_Interface => +2,
Pragma_Interface_Name => +2,
Pragma_Interrupt_Handler => -1,
Pragma_Interrupt_Priority => -1,
Pragma_Interrupt_State => -1,
Pragma_Java_Constructor => -1,
Pragma_Java_Interface => -1,
Pragma_Keep_Names => 0,
Pragma_License => -1,
Pragma_Link_With => -1,
Pragma_Linker_Alias => -1,
Pragma_Linker_Constructor => -1,
Pragma_Linker_Destructor => -1,
Pragma_Linker_Options => -1,
Pragma_Linker_Section => -1,
Pragma_List => -1,
Pragma_Locking_Policy => -1,
Pragma_Long_Float => -1,
Pragma_Machine_Attribute => -1,
Pragma_Main => -1,
Pragma_Main_Storage => -1,
Pragma_Memory_Size => -1,
Pragma_No_Return => 0,
Pragma_No_Run_Time => -1,
Pragma_No_Strict_Aliasing => -1,
Pragma_Normalize_Scalars => -1,
Pragma_Obsolescent => 0,
Pragma_Optimize => -1,
Pragma_Optional_Overriding => -1,
Pragma_Pack => 0,
Pragma_Page => -1,
Pragma_Passive => -1,
Pragma_Polling => -1,
Pragma_Persistent_BSS => 0,
Pragma_Preelaborate => -1,
Pragma_Preelaborate_05 => -1,
Pragma_Priority => -1,
Pragma_Profile => 0,
Pragma_Profile_Warnings => 0,
Pragma_Propagate_Exceptions => -1,
Pragma_Psect_Object => -1,
Pragma_Pure => -1,
Pragma_Pure_05 => -1,
Pragma_Pure_Function => -1,
Pragma_Queuing_Policy => -1,
Pragma_Ravenscar => -1,
Pragma_Remote_Call_Interface => -1,
Pragma_Remote_Types => -1,
Pragma_Restricted_Run_Time => -1,
Pragma_Restriction_Warnings => -1,
Pragma_Restrictions => -1,
Pragma_Reviewable => -1,
Pragma_Share_Generic => -1,
Pragma_Shared => -1,
Pragma_Shared_Passive => -1,
Pragma_Source_File_Name => -1,
Pragma_Source_File_Name_Project => -1,
Pragma_Source_Reference => -1,
Pragma_Storage_Size => -1,
Pragma_Storage_Unit => -1,
Pragma_Stream_Convert => -1,
Pragma_Style_Checks => -1,
Pragma_Subtitle => -1,
Pragma_Suppress => 0,
Pragma_Suppress_Exception_Locations => 0,
Pragma_Suppress_All => -1,
Pragma_Suppress_Debug_Info => 0,
Pragma_Suppress_Initialization => 0,
Pragma_System_Name => -1,
Pragma_Task_Dispatching_Policy => -1,
Pragma_Task_Info => -1,
Pragma_Task_Name => -1,
Pragma_Task_Storage => 0,
Pragma_Thread_Body => +2,
Pragma_Time_Slice => -1,
Pragma_Title => -1,
Pragma_Unchecked_Union => 0,
Pragma_Unimplemented_Unit => -1,
Pragma_Universal_Data => -1,
Pragma_Unreferenced => -1,
Pragma_Unreserve_All_Interrupts => -1,
Pragma_Unsuppress => 0,
Pragma_Use_VADS_Size => -1,
Pragma_Validity_Checks => -1,
Pragma_Volatile => 0,
Pragma_Volatile_Components => 0,
Pragma_Warnings => -1,
Pragma_Weak_External => 0,
Unknown_Pragma => 0);
function Is_Non_Significant_Pragma_Reference (N : Node_Id) return Boolean is
P : Node_Id;
C : Int;
A : Node_Id;
begin
P := Parent (N);
if Nkind (P) /= N_Pragma_Argument_Association then
return False;
else
C := Sig_Flags (Get_Pragma_Id (Chars (Parent (P))));
case C is
when -1 =>
return False;
when 0 =>
return True;
when others =>
A := First (Pragma_Argument_Associations (Parent (P)));
for J in 1 .. C - 1 loop
if No (A) then
return False;
end if;
Next (A);
end loop;
return A = P;
end case;
end if;
end Is_Non_Significant_Pragma_Reference;
------------------------------
-- Is_Pragma_String_Literal --
------------------------------
-- This function returns true if the corresponding pragma argument is
-- a static string expression. These are the only cases in which string
-- literals can appear as pragma arguments. We also allow a string
-- literal as the first argument to pragma Assert (although it will
-- of course always generate a type error).
function Is_Pragma_String_Literal (Par : Node_Id) return Boolean is
Pragn : constant Node_Id := Parent (Par);
Assoc : constant List_Id := Pragma_Argument_Associations (Pragn);
Pname : constant Name_Id := Chars (Pragn);
Argn : Natural;
N : Node_Id;
begin
Argn := 1;
N := First (Assoc);
loop
exit when N = Par;
Argn := Argn + 1;
Next (N);
end loop;
if Pname = Name_Assert then
return True;
elsif Pname = Name_Export then
return Argn > 2;
elsif Pname = Name_Ident then
return Argn = 1;
elsif Pname = Name_Import then
return Argn > 2;
elsif Pname = Name_Interface_Name then
return Argn > 1;
elsif Pname = Name_Linker_Alias then
return Argn = 2;
elsif Pname = Name_Linker_Section then
return Argn = 2;
elsif Pname = Name_Machine_Attribute then
return Argn = 2;
elsif Pname = Name_Source_File_Name then
return True;
elsif Pname = Name_Source_Reference then
return Argn = 2;
elsif Pname = Name_Title then
return True;
elsif Pname = Name_Subtitle then
return True;
else
return False;
end if;
end Is_Pragma_String_Literal;
--------------------------------------
-- Process_Compilation_Unit_Pragmas --
--------------------------------------
procedure Process_Compilation_Unit_Pragmas (N : Node_Id) is
begin
-- A special check for pragma Suppress_All. This is a strange DEC
-- pragma, strange because it comes at the end of the unit. If we
-- have a pragma Suppress_All in the Pragmas_After of the current
-- unit, then we insert a pragma Suppress (All_Checks) at the start
-- of the context clause to ensure the correct processing.
declare
PA : constant List_Id := Pragmas_After (Aux_Decls_Node (N));
P : Node_Id;
begin
if Present (PA) then
P := First (PA);
while Present (P) loop
if Chars (P) = Name_Suppress_All then
Prepend_To (Context_Items (N),
Make_Pragma (Sloc (P),
Chars => Name_Suppress,
Pragma_Argument_Associations => New_List (
Make_Pragma_Argument_Association (Sloc (P),
Expression =>
Make_Identifier (Sloc (P),
Chars => Name_All_Checks)))));
exit;
end if;
Next (P);
end loop;
end if;
end;
end Process_Compilation_Unit_Pragmas;
--------------------------------
-- Set_Encoded_Interface_Name --
--------------------------------
procedure Set_Encoded_Interface_Name (E : Entity_Id; S : Node_Id) is
Str : constant String_Id := Strval (S);
Len : constant Int := String_Length (Str);
CC : Char_Code;
C : Character;
J : Int;
Hex : constant array (0 .. 15) of Character := "0123456789abcdef";
procedure Encode;
-- Stores encoded value of character code CC. The encoding we
-- use an underscore followed by four lower case hex digits.
------------
-- Encode --
------------
procedure Encode is
begin
Store_String_Char (Get_Char_Code ('_'));
Store_String_Char
(Get_Char_Code (Hex (Integer (CC / 2 ** 12))));
Store_String_Char
(Get_Char_Code (Hex (Integer (CC / 2 ** 8 and 16#0F#))));
Store_String_Char
(Get_Char_Code (Hex (Integer (CC / 2 ** 4 and 16#0F#))));
Store_String_Char
(Get_Char_Code (Hex (Integer (CC and 16#0F#))));
end Encode;
-- Start of processing for Set_Encoded_Interface_Name
begin
-- If first character is asterisk, this is a link name, and we
-- leave it completely unmodified. We also ignore null strings
-- (the latter case happens only in error cases) and no encoding
-- should occur for Java interface names.
if Len = 0
or else Get_String_Char (Str, 1) = Get_Char_Code ('*')
or else Java_VM
then
Set_Interface_Name (E, S);
else
J := 1;
loop
CC := Get_String_Char (Str, J);
exit when not In_Character_Range (CC);
C := Get_Character (CC);
exit when C /= '_' and then C /= '$'
and then C not in '0' .. '9'
and then C not in 'a' .. 'z'
and then C not in 'A' .. 'Z';
if J = Len then
Set_Interface_Name (E, S);
return;
else
J := J + 1;
end if;
end loop;
-- Here we need to encode. The encoding we use as follows:
-- three underscores + four hex digits (lower case)
Start_String;
for J in 1 .. String_Length (Str) loop
CC := Get_String_Char (Str, J);
if not In_Character_Range (CC) then
Encode;
else
C := Get_Character (CC);
if C = '_' or else C = '$'
or else C in '0' .. '9'
or else C in 'a' .. 'z'
or else C in 'A' .. 'Z'
then
Store_String_Char (CC);
else
Encode;
end if;
end if;
end loop;
Set_Interface_Name (E,
Make_String_Literal (Sloc (S),
Strval => End_String));
end if;
end Set_Encoded_Interface_Name;
-------------------
-- Set_Unit_Name --
-------------------
procedure Set_Unit_Name (N : Node_Id; With_Item : Node_Id) is
Pref : Node_Id;
Scop : Entity_Id;
begin
if Nkind (N) = N_Identifier
and then Nkind (With_Item) = N_Identifier
then
Set_Entity (N, Entity (With_Item));
elsif Nkind (N) = N_Selected_Component then
Change_Selected_Component_To_Expanded_Name (N);
Set_Entity (N, Entity (With_Item));
Set_Entity (Selector_Name (N), Entity (N));
Pref := Prefix (N);
Scop := Scope (Entity (N));
while Nkind (Pref) = N_Selected_Component loop
Change_Selected_Component_To_Expanded_Name (Pref);
Set_Entity (Selector_Name (Pref), Scop);
Set_Entity (Pref, Scop);
Pref := Prefix (Pref);
Scop := Scope (Scop);
end loop;
Set_Entity (Pref, Scop);
end if;
end Set_Unit_Name;
end Sem_Prag;