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llvm / llvm-archive / b74e25f9042d5657e8f400dd820eba426827f1dd / . / llvm-gcc-4.2 / gcc / ada / errout.adb
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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- E R R O U T --
-- --
-- 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. --
-- --
------------------------------------------------------------------------------
-- Warning! Error messages can be generated during Gigi processing by direct
-- calls to error message routines, so it is essential that the processing
-- in this body be consistent with the requirements for the Gigi processing
-- environment, and that in particular, no disallowed table expansion is
-- allowed to occur.
with Atree; use Atree;
with Casing; use Casing;
with Csets; use Csets;
with Debug; use Debug;
with Einfo; use Einfo;
with Erroutc; use Erroutc;
with Fname; use Fname;
with Hostparm; use Hostparm;
with Lib; use Lib;
with Namet; use Namet;
with Opt; use Opt;
with Nlists; use Nlists;
with Output; use Output;
with Scans; use Scans;
with Sinput; use Sinput;
with Sinfo; use Sinfo;
with Snames; use Snames;
with Stand; use Stand;
with Style;
with Uname; use Uname;
with Unchecked_Conversion;
package body Errout is
Errors_Must_Be_Ignored : Boolean := False;
-- Set to True by procedure Set_Ignore_Errors (True), when calls to
-- error message procedures should be ignored (when parsing irrelevant
-- text in sources being preprocessed).
Warn_On_Instance : Boolean;
-- Flag set true for warning message to be posted on instance
------------------------------------
-- Table of Non-Instance Messages --
------------------------------------
-- This table contains an entry for every error message processed by the
-- Error_Msg routine that is not posted on generic (or inlined) instance.
-- As explained in further detail in the Error_Msg procedure body, this
-- table is used to avoid posting redundant messages on instances.
type NIM_Record is record
Msg : String_Ptr;
Loc : Source_Ptr;
end record;
-- Type used to store text and location of one message
package Non_Instance_Msgs is new Table.Table (
Table_Component_Type => NIM_Record,
Table_Index_Type => Int,
Table_Low_Bound => 1,
Table_Initial => 100,
Table_Increment => 100,
Table_Name => "Non_Instance_Msgs");
-----------------------
-- Local Subprograms --
-----------------------
procedure Error_Msg_Internal
(Msg : String;
Sptr : Source_Ptr;
Optr : Source_Ptr;
Msg_Cont : Boolean);
-- This is the low level routine used to post messages after dealing with
-- the issue of messages placed on instantiations (which get broken up
-- into separate calls in Error_Msg). Sptr is the location on which the
-- flag will be placed in the output. In the case where the flag is on
-- the template, this points directly to the template, not to one of the
-- instantiation copies of the template. Optr is the original location
-- used to flag the error, and this may indeed point to an instantiation
-- copy. So typically we can see Optr pointing to the template location
-- in an instantiation copy when Sptr points to the source location of
-- the actual instantiation (i.e the line with the new). Msg_Cont is
-- set true if this is a continuation message.
function No_Warnings (N : Node_Or_Entity_Id) return Boolean;
-- Determines if warnings should be suppressed for the given node
function OK_Node (N : Node_Id) return Boolean;
-- Determines if a node is an OK node to place an error message on (return
-- True) or if the error message should be suppressed (return False). A
-- message is suppressed if the node already has an error posted on it,
-- or if it refers to an Etype that has an error posted on it, or if
-- it references an Entity that has an error posted on it.
procedure Output_Source_Line
(L : Physical_Line_Number;
Sfile : Source_File_Index;
Errs : Boolean);
-- Outputs text of source line L, in file S, together with preceding line
-- number, as described above for Output_Line_Number. The Errs parameter
-- indicates if there are errors attached to the line, which forces
-- listing on, even in the presence of pragma List (Off).
procedure Set_Msg_Insertion_Column;
-- Handle column number insertion (@ insertion character)
procedure Set_Msg_Insertion_Node;
-- Handle node (name from node) insertion (& insertion character)
procedure Set_Msg_Insertion_Type_Reference (Flag : Source_Ptr);
-- Handle type reference (right brace insertion character). Flag is the
-- location of the flag, which is provided for the internal call to
-- Set_Msg_Insertion_Line_Number,
procedure Set_Msg_Insertion_Unit_Name;
-- Handle unit name insertion ($ insertion character)
procedure Set_Msg_Node (Node : Node_Id);
-- Add the sequence of characters for the name associated with the
-- given node to the current message.
procedure Set_Msg_Text (Text : String; Flag : Source_Ptr);
-- Add a sequence of characters to the current message. The characters may
-- be one of the special insertion characters (see documentation in spec).
-- Flag is the location at which the error is to be posted, which is used
-- to determine whether or not the # insertion needs a file name. The
-- variables Msg_Buffer, Msglen, Is_Style_Msg, Is_Warning_Msg, and
-- Is_Unconditional_Msg are set on return.
procedure Set_Posted (N : Node_Id);
-- Sets the Error_Posted flag on the given node, and all its parents
-- that are subexpressions and then on the parent non-subexpression
-- construct that contains the original expression (this reduces the
-- number of cascaded messages). Note that this call only has an effect
-- for a serious error. For a non-serious error, it has no effect.
procedure Set_Qualification (N : Nat; E : Entity_Id);
-- Outputs up to N levels of qualification for the given entity. For
-- example, the entity A.B.C.D will output B.C. if N = 2.
function Special_Msg_Delete
(Msg : String;
N : Node_Or_Entity_Id;
E : Node_Or_Entity_Id) return Boolean;
-- This function is called from Error_Msg_NEL, passing the message Msg,
-- node N on which the error is to be posted, and the entity or node E
-- to be used for an & insertion in the message if any. The job of this
-- procedure is to test for certain cascaded messages that we would like
-- to suppress. If the message is to be suppressed then we return True.
-- If the message should be generated (the normal case) False is returned.
procedure Unwind_Internal_Type (Ent : in out Entity_Id);
-- This procedure is given an entity id for an internal type, i.e.
-- a type with an internal name. It unwinds the type to try to get
-- to something reasonably printable, generating prefixes like
-- "subtype of", "access to", etc along the way in the buffer. The
-- value in Ent on return is the final name to be printed. Hopefully
-- this is not an internal name, but in some internal name cases, it
-- is an internal name, and has to be printed anyway (although in this
-- case the message has been killed if possible). The global variable
-- Class_Flag is set to True if the resulting entity should have
-- 'Class appended to its name (see Add_Class procedure), and is
-- otherwise unchanged.
procedure VMS_Convert;
-- This procedure has no effect if called when the host is not OpenVMS.
-- If the host is indeed OpenVMS, then the error message stored in
-- Msg_Buffer is scanned for appearences of switch names which need
-- converting to corresponding VMS qualifer names. See Gnames/Vnames
-- table in Errout spec for precise definition of the conversion that
-- is performed by this routine in OpenVMS mode.
-----------------------
-- Change_Error_Text --
-----------------------
procedure Change_Error_Text (Error_Id : Error_Msg_Id; New_Msg : String) is
Save_Next : Error_Msg_Id;
Err_Id : Error_Msg_Id := Error_Id;
begin
Set_Msg_Text (New_Msg, Errors.Table (Error_Id).Sptr);
Errors.Table (Error_Id).Text := new String'(Msg_Buffer (1 .. Msglen));
-- If in immediate error message mode, output modified error message now
-- This is just a bit tricky, because we want to output just a single
-- message, and the messages we modified is already linked in. We solve
-- this by temporarily resetting its forward pointer to empty.
if Debug_Flag_OO then
Save_Next := Errors.Table (Error_Id).Next;
Errors.Table (Error_Id).Next := No_Error_Msg;
Write_Eol;
Output_Source_Line
(Errors.Table (Error_Id).Line, Errors.Table (Error_Id).Sfile, True);
Output_Error_Msgs (Err_Id);
Errors.Table (Error_Id).Next := Save_Next;
end if;
end Change_Error_Text;
---------------
-- Error_Msg --
---------------
-- Error_Msg posts a flag at the given location, except that if the
-- Flag_Location points within a generic template and corresponds
-- to an instantiation of this generic template, then the actual
-- message will be posted on the generic instantiation, along with
-- additional messages referencing the generic declaration.
procedure Error_Msg (Msg : String; Flag_Location : Source_Ptr) is
Sindex : Source_File_Index;
-- Source index for flag location
Orig_Loc : Source_Ptr;
-- Original location of Flag_Location (i.e. location in original
-- template in instantiation case, otherwise unchanged).
begin
-- It is a fatal error to issue an error message when scanning from
-- the internal source buffer (see Sinput for further documentation)
pragma Assert (Sinput.Source /= Internal_Source_Ptr);
-- Return if all errors are to be ignored
if Errors_Must_Be_Ignored then
return;
end if;
-- If we already have messages, and we are trying to place a message
-- at No_Location or in package Standard, then just ignore the attempt
-- since we assume that what is happening is some cascaded junk. Note
-- that this is safe in the sense that proceeding will surely bomb.
if Flag_Location < First_Source_Ptr
and then Total_Errors_Detected > 0
then
return;
end if;
-- Start procesing of new message
Sindex := Get_Source_File_Index (Flag_Location);
Test_Style_Warning_Serious_Msg (Msg);
Orig_Loc := Original_Location (Flag_Location);
-- If the current location is in an instantiation, the issue arises
-- of whether to post the message on the template or the instantiation.
-- The way we decide is to see if we have posted the same message
-- on the template when we compiled the template (the template is
-- always compiled before any instantiations). For this purpose,
-- we use a separate table of messages. The reason we do this is
-- twofold:
-- First, the messages can get changed by various processing
-- including the insertion of tokens etc, making it hard to
-- do the comparison.
-- Second, we will suppress a warning on a template if it is
-- not in the current extended source unit. That's reasonable
-- and means we don't want the warning on the instantiation
-- here either, but it does mean that the main error table
-- would not in any case include the message.
if Flag_Location = Orig_Loc then
Non_Instance_Msgs.Append ((new String'(Msg), Flag_Location));
Warn_On_Instance := False;
-- Here we have an instance message
else
-- Delete if debug flag off, and this message duplicates a
-- message already posted on the corresponding template
if not Debug_Flag_GG then
for J in Non_Instance_Msgs.First .. Non_Instance_Msgs.Last loop
if Msg = Non_Instance_Msgs.Table (J).Msg.all
and then Non_Instance_Msgs.Table (J).Loc = Orig_Loc
then
return;
end if;
end loop;
end if;
-- No duplicate, so error/warning will be posted on instance
Warn_On_Instance := Is_Warning_Msg;
end if;
-- Ignore warning message that is suppressed. Note that style
-- checks are not considered warning messages for this purpose
if Is_Warning_Msg and then Warnings_Suppressed (Orig_Loc) then
return;
end if;
-- The idea at this stage is that we have two kinds of messages
-- First, we have those messages that are to be placed as requested at
-- Flag_Location. This includes messages that have nothing to do with
-- generics, and also messages placed on generic templates that reflect
-- an error in the template itself. For such messages we simply call
-- Error_Msg_Internal to place the message in the requested location.
if Instantiation (Sindex) = No_Location then
Error_Msg_Internal (Msg, Flag_Location, Flag_Location, False);
return;
end if;
-- If we are trying to flag an error in an instantiation, we may have
-- a generic contract violation. What we generate in this case is:
-- instantiation error at ...
-- original error message
-- or
-- warning: in instantiation at
-- warning: original warning message
-- All these messages are posted at the location of the top level
-- instantiation. If there are nested instantiations, then the
-- instantiation error message can be repeated, pointing to each
-- of the relevant instantiations.
-- Note: the instantiation mechanism is also shared for inlining
-- of subprogram bodies when front end inlining is done. In this
-- case the messages have the form:
-- in inlined body at ...
-- original error message
-- or
-- warning: in inlined body at
-- warning: original warning message
-- OK, this is the case where we have an instantiation error, and
-- we need to generate the error on the instantiation, rather than
-- on the template.
declare
Actual_Error_Loc : Source_Ptr;
-- Location of outer level instantiation in instantiation case, or
-- just a copy of Flag_Location in the normal case. This is the
-- location where all error messages will actually be posted.
Save_Error_Msg_Sloc : constant Source_Ptr := Error_Msg_Sloc;
-- Save possible location set for caller's message. We need to
-- use Error_Msg_Sloc for the location of the instantiation error
-- but we have to preserve a possible original value.
X : Source_File_Index;
Msg_Cont_Status : Boolean;
-- Used to label continuation lines in instantiation case with
-- proper Msg_Cont status.
begin
-- Loop to find highest level instantiation, where all error
-- messages will be placed.
X := Sindex;
loop
Actual_Error_Loc := Instantiation (X);
X := Get_Source_File_Index (Actual_Error_Loc);
exit when Instantiation (X) = No_Location;
end loop;
-- Since we are generating the messages at the instantiation
-- point in any case, we do not want the references to the
-- bad lines in the instance to be annotated with the location
-- of the instantiation.
Suppress_Instance_Location := True;
Msg_Cont_Status := False;
-- Loop to generate instantiation messages
Error_Msg_Sloc := Flag_Location;
X := Get_Source_File_Index (Flag_Location);
while Instantiation (X) /= No_Location loop
-- Suppress instantiation message on continuation lines
if Msg (Msg'First) /= '\' then
-- Case of inlined body
if Inlined_Body (X) then
if Is_Warning_Msg then
Error_Msg_Internal
("?in inlined body #",
Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
else
Error_Msg_Internal
("error in inlined body #",
Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
end if;
-- Case of generic instantiation
else
if Is_Warning_Msg then
Error_Msg_Internal
("?in instantiation #",
Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
else
Error_Msg_Internal
("instantiation error #",
Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
end if;
end if;
end if;
Error_Msg_Sloc := Instantiation (X);
X := Get_Source_File_Index (Error_Msg_Sloc);
Msg_Cont_Status := True;
end loop;
Suppress_Instance_Location := False;
Error_Msg_Sloc := Save_Error_Msg_Sloc;
-- Here we output the original message on the outer instantiation
Error_Msg_Internal
(Msg, Actual_Error_Loc, Flag_Location, Msg_Cont_Status);
end;
end Error_Msg;
------------------
-- Error_Msg_AP --
------------------
procedure Error_Msg_AP (Msg : String) is
S1 : Source_Ptr;
C : Character;
begin
-- If we had saved the Scan_Ptr value after scanning the previous
-- token, then we would have exactly the right place for putting
-- the flag immediately at hand. However, that would add at least
-- two instructions to a Scan call *just* to service the possibility
-- of an Error_Msg_AP call. So instead we reconstruct that value.
-- We have two possibilities, start with Prev_Token_Ptr and skip over
-- the current token, which is made harder by the possibility that this
-- token may be in error, or start with Token_Ptr and work backwards.
-- We used to take the second approach, but it's hard because of
-- comments, and harder still because things that look like comments
-- can appear inside strings. So now we take the first approach.
-- Note: in the case where there is no previous token, Prev_Token_Ptr
-- is set to Source_First, which is a reasonable position for the
-- error flag in this situation.
S1 := Prev_Token_Ptr;
C := Source (S1);
-- If the previous token is a string literal, we need a special approach
-- since there may be white space inside the literal and we don't want
-- to stop on that white space.
-- Note: since this is an error recovery issue anyway, it is not worth
-- worrying about special UTF_32 line terminator characters here.
if Prev_Token = Tok_String_Literal then
loop
S1 := S1 + 1;
if Source (S1) = C then
S1 := S1 + 1;
exit when Source (S1) /= C;
elsif Source (S1) in Line_Terminator then
exit;
end if;
end loop;
-- Character literal also needs special handling
elsif Prev_Token = Tok_Char_Literal then
S1 := S1 + 3;
-- Otherwise we search forward for the end of the current token, marked
-- by a line terminator, white space, a comment symbol or if we bump
-- into the following token (i.e. the current token).
-- Again, it is not worth worrying about UTF_32 special line terminator
-- characters in this context, since this is only for error recovery.
else
while Source (S1) not in Line_Terminator
and then Source (S1) /= ' '
and then Source (S1) /= ASCII.HT
and then (Source (S1) /= '-' or else Source (S1 + 1) /= '-')
and then S1 /= Token_Ptr
loop
S1 := S1 + 1;
end loop;
end if;
-- S1 is now set to the location for the flag
Error_Msg (Msg, S1);
end Error_Msg_AP;
------------------
-- Error_Msg_BC --
------------------
procedure Error_Msg_BC (Msg : String) is
begin
-- If we are at end of file, post the flag after the previous token
if Token = Tok_EOF then
Error_Msg_AP (Msg);
-- If we are at start of file, post the flag at the current token
elsif Token_Ptr = Source_First (Current_Source_File) then
Error_Msg_SC (Msg);
-- If the character before the current token is a space or a horizontal
-- tab, then we place the flag on this character (in the case of a tab
-- we would really like to place it in the "last" character of the tab
-- space, but that it too much trouble to worry about).
elsif Source (Token_Ptr - 1) = ' '
or else Source (Token_Ptr - 1) = ASCII.HT
then
Error_Msg (Msg, Token_Ptr - 1);
-- If there is no space or tab before the current token, then there is
-- no room to place the flag before the token, so we place it on the
-- token instead (this happens for example at the start of a line).
else
Error_Msg (Msg, Token_Ptr);
end if;
end Error_Msg_BC;
-------------------
-- Error_Msg_CRT --
-------------------
procedure Error_Msg_CRT (Feature : String; N : Node_Id) is
CNRT : constant String := " not allowed in no run time mode";
CCRT : constant String := " not supported by configuration>";
S : String (1 .. Feature'Length + 1 + CCRT'Length);
L : Natural;
begin
S (1) := '|';
S (2 .. Feature'Length + 1) := Feature;
L := Feature'Length + 2;
if No_Run_Time_Mode then
S (L .. L + CNRT'Length - 1) := CNRT;
L := L + CNRT'Length - 1;
else pragma Assert (Configurable_Run_Time_Mode);
S (L .. L + CCRT'Length - 1) := CCRT;
L := L + CCRT'Length - 1;
end if;
Error_Msg_N (S (1 .. L), N);
Configurable_Run_Time_Violations := Configurable_Run_Time_Violations + 1;
end Error_Msg_CRT;
-----------------
-- Error_Msg_F --
-----------------
procedure Error_Msg_F (Msg : String; N : Node_Id) is
begin
Error_Msg_NEL (Msg, N, N, Sloc (First_Node (N)));
end Error_Msg_F;
------------------
-- Error_Msg_FE --
------------------
procedure Error_Msg_FE
(Msg : String;
N : Node_Id;
E : Node_Or_Entity_Id)
is
begin
Error_Msg_NEL (Msg, N, E, Sloc (First_Node (N)));
end Error_Msg_FE;
------------------------
-- Error_Msg_Internal --
------------------------
procedure Error_Msg_Internal
(Msg : String;
Sptr : Source_Ptr;
Optr : Source_Ptr;
Msg_Cont : Boolean)
is
Next_Msg : Error_Msg_Id;
-- Pointer to next message at insertion point
Prev_Msg : Error_Msg_Id;
-- Pointer to previous message at insertion point
Temp_Msg : Error_Msg_Id;
procedure Handle_Serious_Error;
-- Internal procedure to do all error message handling for a serious
-- error message, other than bumping the error counts and arranging
-- for the message to be output.
--------------------------
-- Handle_Serious_Error --
--------------------------
procedure Handle_Serious_Error is
begin
-- Turn off code generation if not done already
if Operating_Mode = Generate_Code then
Operating_Mode := Check_Semantics;
Expander_Active := False;
end if;
-- Set the fatal error flag in the unit table unless we are
-- in Try_Semantics mode. This stops the semantics from being
-- performed if we find a serious error. This is skipped if we
-- are currently dealing with the configuration pragma file.
if not Try_Semantics
and then Current_Source_Unit /= No_Unit
then
Set_Fatal_Error (Get_Source_Unit (Sptr));
end if;
end Handle_Serious_Error;
-- Start of processing for Error_Msg_Internal
begin
if Raise_Exception_On_Error /= 0 then
raise Error_Msg_Exception;
end if;
Continuation := Msg_Cont;
Suppress_Message := False;
Kill_Message := False;
Set_Msg_Text (Msg, Sptr);
-- Kill continuation if parent message killed
if Continuation and Last_Killed then
return;
end if;
-- Return without doing anything if message is suppressed
if Suppress_Message
and not All_Errors_Mode
and not (Msg (Msg'Last) = '!')
and not Is_Warning_Msg
then
if not Continuation then
Last_Killed := True;
end if;
return;
end if;
-- Return without doing anything if message is killed and this
-- is not the first error message. The philosophy is that if we
-- get a weird error message and we already have had a message,
-- then we hope the weird message is a junk cascaded message
if Kill_Message
and then not All_Errors_Mode
and then Total_Errors_Detected /= 0
then
if not Continuation then
Last_Killed := True;
end if;
return;
end if;
-- Special check for warning message to see if it should be output
if Is_Warning_Msg then
-- Immediate return if warning message and warnings are suppressed
if Warnings_Suppressed (Optr)
or else Warnings_Suppressed (Sptr)
then
Cur_Msg := No_Error_Msg;
return;
end if;
-- If the flag location is in the main extended source unit
-- then for sure we want the warning since it definitely belongs
if In_Extended_Main_Source_Unit (Sptr) then
null;
-- If the flag location is not in the main extended source
-- unit then we want to eliminate the warning.
elsif In_Extended_Main_Code_Unit (Sptr)
and then Warn_On_Instance
then
null;
-- Keep warning if debug flag G set
elsif Debug_Flag_GG then
null;
-- Here is where we delete a warning from a with'ed unit
else
Cur_Msg := No_Error_Msg;
return;
end if;
end if;
-- If message is to be ignored in special ignore message mode, this is
-- where we do this special processing, bypassing message output.
if Ignore_Errors_Enable > 0 then
if Is_Serious_Error then
Handle_Serious_Error;
end if;
return;
end if;
-- Otherwise build error message object for new message
Errors.Increment_Last;
Cur_Msg := Errors.Last;
Errors.Table (Cur_Msg).Text := new String'(Msg_Buffer (1 .. Msglen));
Errors.Table (Cur_Msg).Next := No_Error_Msg;
Errors.Table (Cur_Msg).Sptr := Sptr;
Errors.Table (Cur_Msg).Optr := Optr;
Errors.Table (Cur_Msg).Sfile := Get_Source_File_Index (Sptr);
Errors.Table (Cur_Msg).Line := Get_Physical_Line_Number (Sptr);
Errors.Table (Cur_Msg).Col := Get_Column_Number (Sptr);
Errors.Table (Cur_Msg).Warn := Is_Warning_Msg;
Errors.Table (Cur_Msg).Style := Is_Style_Msg;
Errors.Table (Cur_Msg).Serious := Is_Serious_Error;
Errors.Table (Cur_Msg).Uncond
:= Is_Unconditional_Msg or Is_Warning_Msg;
Errors.Table (Cur_Msg).Msg_Cont := Continuation;
Errors.Table (Cur_Msg).Deleted := False;
-- If immediate errors mode set, output error message now. Also output
-- now if the -d1 debug flag is set (so node number message comes out
-- just before actual error message)
if Debug_Flag_OO or else Debug_Flag_1 then
Write_Eol;
Output_Source_Line (Errors.Table (Cur_Msg).Line,
Errors.Table (Cur_Msg).Sfile, True);
Temp_Msg := Cur_Msg;
Output_Error_Msgs (Temp_Msg);
-- If not in immediate errors mode, then we insert the message in the
-- error chain for later output by Finalize. The messages are sorted
-- first by unit (main unit comes first), and within a unit by source
-- location (earlier flag location first in the chain).
else
-- First a quick check, does this belong at the very end of the
-- chain of error messages. This saves a lot of time in the
-- normal case if there are lots of messages.
if Last_Error_Msg /= No_Error_Msg
and then Errors.Table (Cur_Msg).Sfile =
Errors.Table (Last_Error_Msg).Sfile
and then (Sptr > Errors.Table (Last_Error_Msg).Sptr
or else
(Sptr = Errors.Table (Last_Error_Msg).Sptr
and then
Optr > Errors.Table (Last_Error_Msg).Optr))
then
Prev_Msg := Last_Error_Msg;
Next_Msg := No_Error_Msg;
-- Otherwise do a full sequential search for the insertion point
else
Prev_Msg := No_Error_Msg;
Next_Msg := First_Error_Msg;
while Next_Msg /= No_Error_Msg loop
exit when
Errors.Table (Cur_Msg).Sfile < Errors.Table (Next_Msg).Sfile;
if Errors.Table (Cur_Msg).Sfile =
Errors.Table (Next_Msg).Sfile
then
exit when Sptr < Errors.Table (Next_Msg).Sptr
or else
(Sptr = Errors.Table (Next_Msg).Sptr
and then
Optr < Errors.Table (Next_Msg).Optr);
end if;
Prev_Msg := Next_Msg;
Next_Msg := Errors.Table (Next_Msg).Next;
end loop;
end if;
-- Now we insert the new message in the error chain. The insertion
-- point for the message is after Prev_Msg and before Next_Msg.
-- The possible insertion point for the new message is after Prev_Msg
-- and before Next_Msg. However, this is where we do a special check
-- for redundant parsing messages, defined as messages posted on the
-- same line. The idea here is that probably such messages are junk
-- from the parser recovering. In full errors mode, we don't do this
-- deletion, but otherwise such messages are discarded at this stage.
if Prev_Msg /= No_Error_Msg
and then Errors.Table (Prev_Msg).Line =
Errors.Table (Cur_Msg).Line
and then Errors.Table (Prev_Msg).Sfile =
Errors.Table (Cur_Msg).Sfile
and then Compiler_State = Parsing
and then not All_Errors_Mode
then
-- Don't delete unconditional messages and at this stage,
-- don't delete continuation lines (we attempted to delete
-- those earlier if the parent message was deleted.
if not Errors.Table (Cur_Msg).Uncond
and then not Continuation
then
-- Don't delete if prev msg is warning and new msg is
-- an error. This is because we don't want a real error
-- masked by a warning. In all other cases (that is parse
-- errors for the same line that are not unconditional)
-- we do delete the message. This helps to avoid
-- junk extra messages from cascaded parsing errors
if not (Errors.Table (Prev_Msg).Warn
or
Errors.Table (Prev_Msg).Style)
or else
(Errors.Table (Cur_Msg).Warn
or
Errors.Table (Cur_Msg).Style)
then
-- All tests passed, delete the message by simply
-- returning without any further processing.
if not Continuation then
Last_Killed := True;
end if;
return;
end if;
end if;
end if;
-- Come here if message is to be inserted in the error chain
if not Continuation then
Last_Killed := False;
end if;
if Prev_Msg = No_Error_Msg then
First_Error_Msg := Cur_Msg;
else
Errors.Table (Prev_Msg).Next := Cur_Msg;
end if;
Errors.Table (Cur_Msg).Next := Next_Msg;
if Next_Msg = No_Error_Msg then
Last_Error_Msg := Cur_Msg;
end if;
end if;
-- Bump appropriate statistics count
if Errors.Table (Cur_Msg).Warn
or else Errors.Table (Cur_Msg).Style
then
Warnings_Detected := Warnings_Detected + 1;
else
Total_Errors_Detected := Total_Errors_Detected + 1;
if Errors.Table (Cur_Msg).Serious then
Serious_Errors_Detected := Serious_Errors_Detected + 1;
Handle_Serious_Error;
end if;
end if;
-- Terminate if max errors reached
if Total_Errors_Detected + Warnings_Detected = Maximum_Errors then
raise Unrecoverable_Error;
end if;
end Error_Msg_Internal;
-----------------
-- Error_Msg_N --
-----------------
procedure Error_Msg_N (Msg : String; N : Node_Or_Entity_Id) is
begin
Error_Msg_NEL (Msg, N, N, Sloc (N));
end Error_Msg_N;
------------------
-- Error_Msg_NE --
------------------
procedure Error_Msg_NE
(Msg : String;
N : Node_Or_Entity_Id;
E : Node_Or_Entity_Id)
is
begin
Error_Msg_NEL (Msg, N, E, Sloc (N));
end Error_Msg_NE;
-------------------
-- Error_Msg_NEL --
-------------------
procedure Error_Msg_NEL
(Msg : String;
N : Node_Or_Entity_Id;
E : Node_Or_Entity_Id;
Flag_Location : Source_Ptr)
is
begin
if Special_Msg_Delete (Msg, N, E) then
return;
end if;
Test_Style_Warning_Serious_Msg (Msg);
-- Special handling for warning messages
if Is_Warning_Msg then
-- Suppress if no warnings set for either entity or node
if No_Warnings (N) or else No_Warnings (E) then
return;
end if;
-- Suppress if inside loop that is known to be null
declare
P : Node_Id;
begin
P := Parent (N);
while Present (P) loop
if Nkind (P) = N_Loop_Statement and then Is_Null_Loop (P) then
return;
end if;
P := Parent (P);
end loop;
end;
end if;
-- Test for message to be output
if All_Errors_Mode
or else Msg (Msg'Last) = '!'
or else Is_Warning_Msg
or else OK_Node (N)
or else (Msg (Msg'First) = '\' and not Last_Killed)
then
Debug_Output (N);
Error_Msg_Node_1 := E;
Error_Msg (Msg, Flag_Location);
else
Last_Killed := True;
end if;
if not Is_Warning_Msg and then not Is_Style_Msg then
Set_Posted (N);
end if;
end Error_Msg_NEL;
------------------
-- Error_Msg_NW --
------------------
procedure Error_Msg_NW
(Eflag : Boolean;
Msg : String;
N : Node_Or_Entity_Id)
is
begin
if Eflag
and then In_Extended_Main_Source_Unit (N)
and then Comes_From_Source (N)
then
Error_Msg_NEL (Msg, N, N, Sloc (N));
end if;
end Error_Msg_NW;
-----------------
-- Error_Msg_S --
-----------------
procedure Error_Msg_S (Msg : String) is
begin
Error_Msg (Msg, Scan_Ptr);
end Error_Msg_S;
------------------
-- Error_Msg_SC --
------------------
procedure Error_Msg_SC (Msg : String) is
begin
-- If we are at end of file, post the flag after the previous token
if Token = Tok_EOF then
Error_Msg_AP (Msg);
-- For all other cases the message is posted at the current token
-- pointer position
else
Error_Msg (Msg, Token_Ptr);
end if;
end Error_Msg_SC;
------------------
-- Error_Msg_SP --
------------------
procedure Error_Msg_SP (Msg : String) is
begin
-- Note: in the case where there is no previous token, Prev_Token_Ptr
-- is set to Source_First, which is a reasonable position for the
-- error flag in this situation
Error_Msg (Msg, Prev_Token_Ptr);
end Error_Msg_SP;
--------------
-- Finalize --
--------------
procedure Finalize is
Cur : Error_Msg_Id;
Nxt : Error_Msg_Id;
E, F : Error_Msg_Id;
Err_Flag : Boolean;
begin
-- Reset current error source file if the main unit has a pragma
-- Source_Reference. This ensures outputting the proper name of
-- the source file in this situation.
if Main_Source_File = No_Source_File or else
Num_SRef_Pragmas (Main_Source_File) /= 0
then
Current_Error_Source_File := No_Source_File;
end if;
-- Eliminate any duplicated error messages from the list. This is
-- done after the fact to avoid problems with Change_Error_Text.
Cur := First_Error_Msg;
while Cur /= No_Error_Msg loop
Nxt := Errors.Table (Cur).Next;
F := Nxt;
while F /= No_Error_Msg
and then Errors.Table (F).Sptr = Errors.Table (Cur).Sptr
loop
Check_Duplicate_Message (Cur, F);
F := Errors.Table (F).Next;
end loop;
Cur := Nxt;
end loop;
-- Brief Error mode
if Brief_Output or (not Full_List and not Verbose_Mode) then
Set_Standard_Error;
E := First_Error_Msg;
while E /= No_Error_Msg loop
if not Errors.Table (E).Deleted and then not Debug_Flag_KK then
if Full_Path_Name_For_Brief_Errors then
Write_Name (Full_Ref_Name (Errors.Table (E).Sfile));
else
Write_Name (Reference_Name (Errors.Table (E).Sfile));
end if;
Write_Char (':');
Write_Int (Int (Physical_To_Logical
(Errors.Table (E).Line,
Errors.Table (E).Sfile)));
Write_Char (':');
if Errors.Table (E).Col < 10 then
Write_Char ('0');
end if;
Write_Int (Int (Errors.Table (E).Col));
Write_Str (": ");
Output_Msg_Text (E);
Write_Eol;
end if;
E := Errors.Table (E).Next;
end loop;
Set_Standard_Output;
end if;
-- Full source listing case
if Full_List then
List_Pragmas_Index := 1;
List_Pragmas_Mode := True;
E := First_Error_Msg;
Write_Eol;
-- First list initial main source file with its error messages
for N in 1 .. Last_Source_Line (Main_Source_File) loop
Err_Flag :=
E /= No_Error_Msg
and then Errors.Table (E).Line = N
and then Errors.Table (E).Sfile = Main_Source_File;
Output_Source_Line (N, Main_Source_File, Err_Flag);
if Err_Flag then
Output_Error_Msgs (E);
if not Debug_Flag_2 then
Write_Eol;
end if;
end if;
end loop;
-- Then output errors, if any, for subsidiary units
while E /= No_Error_Msg
and then Errors.Table (E).Sfile /= Main_Source_File
loop
Write_Eol;
Output_Source_Line
(Errors.Table (E).Line, Errors.Table (E).Sfile, True);
Output_Error_Msgs (E);
end loop;
end if;
-- Verbose mode (error lines only with error flags)
if Verbose_Mode and not Full_List then
E := First_Error_Msg;
-- Loop through error lines
while E /= No_Error_Msg loop
Write_Eol;
Output_Source_Line
(Errors.Table (E).Line, Errors.Table (E).Sfile, True);
Output_Error_Msgs (E);
end loop;
end if;
-- Output error summary if verbose or full list mode
if Verbose_Mode or else Full_List then
-- Extra blank line if error messages or source listing were output
if Total_Errors_Detected + Warnings_Detected > 0
or else Full_List
then
Write_Eol;
end if;
-- Message giving number of lines read and number of errors detected.
-- This normally goes to Standard_Output. The exception is when brief
-- mode is not set, verbose mode (or full list mode) is set, and
-- there are errors. In this case we send the message to standard
-- error to make sure that *something* appears on standard error in
-- an error situation.
-- Formerly, only the "# errors" suffix was sent to stderr, whereas
-- "# lines:" appeared on stdout. This caused problems on VMS when
-- the stdout buffer was flushed, giving an extra line feed after
-- the prefix.
if Total_Errors_Detected + Warnings_Detected /= 0
and then not Brief_Output
and then (Verbose_Mode or Full_List)
then
Set_Standard_Error;
end if;
-- Message giving total number of lines
Write_Str (" ");
Write_Int (Num_Source_Lines (Main_Source_File));
if Num_Source_Lines (Main_Source_File) = 1 then
Write_Str (" line: ");
else
Write_Str (" lines: ");
end if;
if Total_Errors_Detected = 0 then
Write_Str ("No errors");
elsif Total_Errors_Detected = 1 then
Write_Str ("1 error");
else
Write_Int (Total_Errors_Detected);
Write_Str (" errors");
end if;
if Warnings_Detected /= 0 then
Write_Str (", ");
Write_Int (Warnings_Detected);
Write_Str (" warning");
if Warnings_Detected /= 1 then
Write_Char ('s');
end if;
if Warning_Mode = Treat_As_Error then
Write_Str (" (treated as error");
if Warnings_Detected /= 1 then
Write_Char ('s');
end if;
Write_Char (')');
end if;
end if;
Write_Eol;
Set_Standard_Output;
end if;
if Maximum_Errors /= 0
and then Total_Errors_Detected + Warnings_Detected = Maximum_Errors
then
Set_Standard_Error;
Write_Str ("fatal error: maximum errors reached");
Write_Eol;
Set_Standard_Output;
end if;
if Warning_Mode = Treat_As_Error then
Total_Errors_Detected := Total_Errors_Detected + Warnings_Detected;
Warnings_Detected := 0;
end if;
end Finalize;
----------------
-- First_Node --
----------------
function First_Node (C : Node_Id) return Node_Id is
L : constant Source_Ptr := Sloc (C);
Sfile : constant Source_File_Index := Get_Source_File_Index (L);
Earliest : Node_Id;
Eloc : Source_Ptr;
Discard : Traverse_Result;
pragma Warnings (Off, Discard);
function Test_Earlier (N : Node_Id) return Traverse_Result;
-- Function applied to every node in the construct
function Search_Tree_First is new Traverse_Func (Test_Earlier);
-- Create traversal function
------------------
-- Test_Earlier --
------------------
function Test_Earlier (N : Node_Id) return Traverse_Result is
Loc : constant Source_Ptr := Sloc (N);
begin
-- Check for earlier. The tests for being in the same file ensures
-- against strange cases of foreign code somehow being present. We
-- don't want wild placement of messages if that happens, so it is
-- best to just ignore this situation.
if Loc < Eloc
and then Get_Source_File_Index (Loc) = Sfile
then
Earliest := N;
Eloc := Loc;
end if;
return OK_Orig;
end Test_Earlier;
-- Start of processing for First_Node
begin
Earliest := Original_Node (C);
Eloc := Sloc (Earliest);
Discard := Search_Tree_First (Original_Node (C));
return Earliest;
end First_Node;
----------------
-- First_Sloc --
----------------
function First_Sloc (N : Node_Id) return Source_Ptr is
SI : constant Source_File_Index := Source_Index (Get_Source_Unit (N));
SF : constant Source_Ptr := Source_First (SI);
F : Node_Id;
S : Source_Ptr;
begin
F := First_Node (N);
S := Sloc (F);
-- The following circuit is a bit subtle. When we have parenthesized
-- expressions, then the Sloc will not record the location of the
-- paren, but we would like to post the flag on the paren. So what
-- we do is to crawl up the tree from the First_Node, adjusting the
-- Sloc value for any parentheses we know are present. Yes, we know
-- this circuit is not 100% reliable (e.g. because we don't record
-- all possible paren level valoues), but this is only for an error
-- message so it is good enough.
Node_Loop : loop
Paren_Loop : for J in 1 .. Paren_Count (F) loop
-- We don't look more than 12 characters behind the current
-- location, and in any case not past the front of the source.
Search_Loop : for K in 1 .. 12 loop
exit Search_Loop when S = SF;
if Source_Text (SI) (S - 1) = '(' then
S := S - 1;
exit Search_Loop;
elsif Source_Text (SI) (S - 1) <= ' ' then
S := S - 1;
else
exit Search_Loop;
end if;
end loop Search_Loop;
end loop Paren_Loop;
exit Node_Loop when F = N;
F := Parent (F);
exit Node_Loop when Nkind (F) not in N_Subexpr;
end loop Node_Loop;
return S;
end First_Sloc;
----------------
-- Initialize --
----------------
procedure Initialize is
begin
Errors.Init;
First_Error_Msg := No_Error_Msg;
Last_Error_Msg := No_Error_Msg;
Serious_Errors_Detected := 0;
Total_Errors_Detected := 0;
Warnings_Detected := 0;
Cur_Msg := No_Error_Msg;
List_Pragmas.Init;
-- Initialize warnings table, if all warnings are suppressed, supply
-- an initial dummy entry covering all possible source locations.
Warnings.Init;
if Warning_Mode = Suppress then
Warnings.Increment_Last;
Warnings.Table (Warnings.Last).Start := Source_Ptr'First;
Warnings.Table (Warnings.Last).Stop := Source_Ptr'Last;
end if;
end Initialize;
-----------------
-- No_Warnings --
-----------------
function No_Warnings (N : Node_Or_Entity_Id) return Boolean is
begin
if Error_Posted (N) then
return True;
elsif Nkind (N) in N_Entity and then Warnings_Off (N) then
return True;
elsif Is_Entity_Name (N)
and then Present (Entity (N))
and then Warnings_Off (Entity (N))
then
return True;
else
return False;
end if;
end No_Warnings;
-------------
-- OK_Node --
-------------
function OK_Node (N : Node_Id) return Boolean is
K : constant Node_Kind := Nkind (N);
begin
if Error_Posted (N) then
return False;
elsif K in N_Has_Etype
and then Present (Etype (N))
and then Error_Posted (Etype (N))
then
return False;
elsif (K in N_Op
or else K = N_Attribute_Reference
or else K = N_Character_Literal
or else K = N_Expanded_Name
or else K = N_Identifier
or else K = N_Operator_Symbol)
and then Present (Entity (N))
and then Error_Posted (Entity (N))
then
return False;
else
return True;
end if;
end OK_Node;
------------------------
-- Output_Source_Line --
------------------------
procedure Output_Source_Line
(L : Physical_Line_Number;
Sfile : Source_File_Index;
Errs : Boolean)
is
S : Source_Ptr;
C : Character;
Line_Number_Output : Boolean := False;
-- Set True once line number is output
begin
if Sfile /= Current_Error_Source_File then
Write_Str ("==============Error messages for ");
case Sinput.File_Type (Sfile) is
when Sinput.Src =>
Write_Str ("source");
when Sinput.Config =>
Write_Str ("configuration pragmas");
when Sinput.Def =>
Write_Str ("symbol definition");
when Sinput.Preproc =>
Write_Str ("preprocessing data");
end case;
Write_Str (" file: ");
Write_Name (Full_File_Name (Sfile));
Write_Eol;
if Num_SRef_Pragmas (Sfile) > 0 then
Write_Str ("--------------Line numbers from file: ");
Write_Name (Full_Ref_Name (Sfile));
Write_Str (" (starting at line ");
Write_Int (Int (First_Mapped_Line (Sfile)));
Write_Char (')');
Write_Eol;
end if;
Current_Error_Source_File := Sfile;
end if;
if Errs or List_Pragmas_Mode then
Output_Line_Number (Physical_To_Logical (L, Sfile));
Line_Number_Output := True;
end if;
S := Line_Start (L, Sfile);
loop
C := Source_Text (Sfile) (S);
exit when C = ASCII.LF or else C = ASCII.CR or else C = EOF;
-- Deal with matching entry in List_Pragmas table
if Full_List
and then List_Pragmas_Index <= List_Pragmas.Last
and then S = List_Pragmas.Table (List_Pragmas_Index).Ploc
then
case List_Pragmas.Table (List_Pragmas_Index).Ptyp is
when Page =>
Write_Char (C);
-- Ignore if on line with errors so that error flags
-- get properly listed with the error line .
if not Errs then
Write_Char (ASCII.FF);
end if;
when List_On =>
List_Pragmas_Mode := True;
if not Line_Number_Output then
Output_Line_Number (Physical_To_Logical (L, Sfile));
Line_Number_Output := True;
end if;
Write_Char (C);
when List_Off =>
Write_Char (C);
List_Pragmas_Mode := False;
end case;
List_Pragmas_Index := List_Pragmas_Index + 1;
-- Normal case (no matching entry in List_Pragmas table)
else
if Errs or List_Pragmas_Mode then
Write_Char (C);
end if;
end if;
S := S + 1;
end loop;
if Line_Number_Output then
Write_Eol;
end if;
end Output_Source_Line;
-----------------------------
-- Remove_Warning_Messages --
-----------------------------
procedure Remove_Warning_Messages (N : Node_Id) is
function Check_For_Warning (N : Node_Id) return Traverse_Result;
-- This function checks one node for a possible warning message
function Check_All_Warnings is new
Traverse_Func (Check_For_Warning);
-- This defines the traversal operation
-----------------------
-- Check_For_Warning --
-----------------------
function Check_For_Warning (N : Node_Id) return Traverse_Result is
Loc : constant Source_Ptr := Sloc (N);
E : Error_Msg_Id;
function To_Be_Removed (E : Error_Msg_Id) return Boolean;
-- Returns True for a message that is to be removed. Also adjusts
-- warning count appropriately.
-------------------
-- To_Be_Removed --
-------------------
function To_Be_Removed (E : Error_Msg_Id) return Boolean is
begin
if E /= No_Error_Msg
and then Errors.Table (E).Optr = Loc
and then (Errors.Table (E).Warn or Errors.Table (E).Style)
then
Warnings_Detected := Warnings_Detected - 1;
return True;
else
return False;
end if;
end To_Be_Removed;
-- Start of processing for Check_For_Warnings
begin
while To_Be_Removed (First_Error_Msg) loop
First_Error_Msg := Errors.Table (First_Error_Msg).Next;
end loop;
if First_Error_Msg = No_Error_Msg then
Last_Error_Msg := No_Error_Msg;
end if;
E := First_Error_Msg;
while E /= No_Error_Msg loop
while To_Be_Removed (Errors.Table (E).Next) loop
Errors.Table (E).Next :=
Errors.Table (Errors.Table (E).Next).Next;
if Errors.Table (E).Next = No_Error_Msg then
Last_Error_Msg := E;
end if;
end loop;
E := Errors.Table (E).Next;
end loop;
if Nkind (N) = N_Raise_Constraint_Error
and then Original_Node (N) /= N
and then No (Condition (N))
then
-- Warnings may have been posted on subexpressions of
-- the original tree. We place the original node back
-- on the tree to remove those warnings, whose sloc
-- do not match those of any node in the current tree.
-- Given that we are in unreachable code, this modification
-- to the tree is harmless.
declare
Status : Traverse_Result;
begin
if Is_List_Member (N) then
Set_Condition (N, Original_Node (N));
Status := Check_All_Warnings (Condition (N));
else
Rewrite (N, Original_Node (N));
Status := Check_All_Warnings (N);
end if;
return Status;
end;
else
return OK;
end if;
end Check_For_Warning;
-- Start of processing for Remove_Warning_Messages
begin
if Warnings_Detected /= 0 then
declare
Discard : Traverse_Result;
pragma Warnings (Off, Discard);
begin
Discard := Check_All_Warnings (N);
end;
end if;
end Remove_Warning_Messages;
procedure Remove_Warning_Messages (L : List_Id) is
Stat : Node_Id;
begin
if Is_Non_Empty_List (L) then
Stat := First (L);
while Present (Stat) loop
Remove_Warning_Messages (Stat);
Next (Stat);
end loop;
end if;
end Remove_Warning_Messages;
---------------------------
-- Set_Identifier_Casing --
---------------------------
procedure Set_Identifier_Casing
(Identifier_Name : System.Address;
File_Name : System.Address)
is
type Big_String is array (Positive) of Character;
type Big_String_Ptr is access all Big_String;
function To_Big_String_Ptr is new Unchecked_Conversion
(System.Address, Big_String_Ptr);
Ident : constant Big_String_Ptr := To_Big_String_Ptr (Identifier_Name);
File : constant Big_String_Ptr := To_Big_String_Ptr (File_Name);
Flen : Natural;
Desired_Case : Casing_Type := Mixed_Case;
-- Casing required for result. Default value of Mixed_Case is used if
-- for some reason we cannot find the right file name in the table.
begin
-- Get length of file name
Flen := 0;
while File (Flen + 1) /= ASCII.NUL loop
Flen := Flen + 1;
end loop;
-- Loop through file names to find matching one. This is a bit slow,
-- but we only do it in error situations so it is not so terrible.
-- Note that if the loop does not exit, then the desired case will
-- be left set to Mixed_Case, this can happen if the name was not
-- in canonical form, and gets canonicalized on VMS. Possibly we
-- could fix this by unconditinally canonicalizing these names ???
for J in 1 .. Last_Source_File loop
Get_Name_String (Full_Debug_Name (J));
if Name_Len = Flen
and then Name_Buffer (1 .. Name_Len) = String (File (1 .. Flen))
then
Desired_Case := Identifier_Casing (J);
exit;
end if;
end loop;
-- Copy identifier as given to Name_Buffer
for J in Name_Buffer'Range loop
Name_Buffer (J) := Ident (J);
if Name_Buffer (J) = ASCII.Nul then
Name_Len := J - 1;
exit;
end if;
end loop;
Set_Casing (Desired_Case);
end Set_Identifier_Casing;
-----------------------
-- Set_Ignore_Errors --
-----------------------
procedure Set_Ignore_Errors (To : Boolean) is
begin
Errors_Must_Be_Ignored := To;
end Set_Ignore_Errors;
------------------------------
-- Set_Msg_Insertion_Column --
------------------------------
procedure Set_Msg_Insertion_Column is
begin
if Style.RM_Column_Check then
Set_Msg_Str (" in column ");
Set_Msg_Int (Int (Error_Msg_Col) + 1);
end if;
end Set_Msg_Insertion_Column;
----------------------------
-- Set_Msg_Insertion_Node --
----------------------------
procedure Set_Msg_Insertion_Node is
K : Node_Kind;
begin
Suppress_Message :=
Error_Msg_Node_1 = Error
or else Error_Msg_Node_1 = Any_Type;
if Error_Msg_Node_1 = Empty then
Set_Msg_Blank_Conditional;
Set_Msg_Str ("<empty>");
elsif Error_Msg_Node_1 = Error then
Set_Msg_Blank;
Set_Msg_Str ("<error>");
elsif Error_Msg_Node_1 = Standard_Void_Type then
Set_Msg_Blank;
Set_Msg_Str ("procedure name");
else
Set_Msg_Blank_Conditional;
-- Output name
K := Nkind (Error_Msg_Node_1);
-- If we have operator case, skip quotes since name of operator
-- itself will supply the required quotations. An operator can be
-- an applied use in an expression or an explicit operator symbol,
-- or an identifier whose name indicates it is an operator.
if K in N_Op
or else K = N_Operator_Symbol
or else K = N_Defining_Operator_Symbol
or else ((K = N_Identifier or else K = N_Defining_Identifier)
and then Is_Operator_Name (Chars (Error_Msg_Node_1)))
then
Set_Msg_Node (Error_Msg_Node_1);
-- Normal case, not an operator, surround with quotes
else
Set_Msg_Quote;
Set_Qualification (Error_Msg_Qual_Level, Error_Msg_Node_1);
Set_Msg_Node (Error_Msg_Node_1);
Set_Msg_Quote;
end if;
end if;
-- The following assignment ensures that a second ampersand insertion
-- character will correspond to the Error_Msg_Node_2 parameter. We
-- suppress possible validity checks in case operating in -gnatVa mode,
-- and Error_Msg_Node_2 is not needed and has not been set.
declare
pragma Suppress (Range_Check);
begin
Error_Msg_Node_1 := Error_Msg_Node_2;
end;
end Set_Msg_Insertion_Node;
--------------------------------------
-- Set_Msg_Insertion_Type_Reference --
--------------------------------------
procedure Set_Msg_Insertion_Type_Reference (Flag : Source_Ptr) is
Ent : Entity_Id;
begin
Set_Msg_Blank;
if Error_Msg_Node_1 = Standard_Void_Type then
Set_Msg_Str ("package or procedure name");
return;
elsif Error_Msg_Node_1 = Standard_Exception_Type then
Set_Msg_Str ("exception name");
return;
elsif Error_Msg_Node_1 = Any_Access
or else Error_Msg_Node_1 = Any_Array
or else Error_Msg_Node_1 = Any_Boolean
or else Error_Msg_Node_1 = Any_Character
or else Error_Msg_Node_1 = Any_Composite
or else Error_Msg_Node_1 = Any_Discrete
or else Error_Msg_Node_1 = Any_Fixed
or else Error_Msg_Node_1 = Any_Integer
or else Error_Msg_Node_1 = Any_Modular
or else Error_Msg_Node_1 = Any_Numeric
or else Error_Msg_Node_1 = Any_Real
or else Error_Msg_Node_1 = Any_Scalar
or else Error_Msg_Node_1 = Any_String
then
Get_Unqualified_Decoded_Name_String (Chars (Error_Msg_Node_1));
Set_Msg_Name_Buffer;
return;
elsif Error_Msg_Node_1 = Universal_Real then
Set_Msg_Str ("type universal real");
return;
elsif Error_Msg_Node_1 = Universal_Integer then
Set_Msg_Str ("type universal integer");
return;
elsif Error_Msg_Node_1 = Universal_Fixed then
Set_Msg_Str ("type universal fixed");
return;
end if;
-- Special case of anonymous array
if Nkind (Error_Msg_Node_1) in N_Entity
and then Is_Array_Type (Error_Msg_Node_1)
and then Present (Related_Array_Object (Error_Msg_Node_1))
then
Set_Msg_Str ("type of ");
Set_Msg_Node (Related_Array_Object (Error_Msg_Node_1));
Set_Msg_Str (" declared");
Set_Msg_Insertion_Line_Number
(Sloc (Related_Array_Object (Error_Msg_Node_1)), Flag);
return;
end if;
-- If we fall through, it is not a special case, so first output
-- the name of the type, preceded by private for a private type
if Is_Private_Type (Error_Msg_Node_1) then
Set_Msg_Str ("private type ");
else
Set_Msg_Str ("type ");
end if;
Ent := Error_Msg_Node_1;
if Is_Internal_Name (Chars (Ent)) then
Unwind_Internal_Type (Ent);
end if;
-- Types in Standard are displayed as "Standard.name"
if Sloc (Ent) <= Standard_Location then
Set_Msg_Quote;
Set_Msg_Str ("Standard.");
Set_Msg_Node (Ent);
Add_Class;
Set_Msg_Quote;
-- Types in other language defined units are displayed as
-- "package-name.type-name"
elsif
Is_Predefined_File_Name (Unit_File_Name (Get_Source_Unit (Ent)))
then
Get_Unqualified_Decoded_Name_String
(Unit_Name (Get_Source_Unit (Ent)));
Name_Len := Name_Len - 2;
Set_Msg_Quote;
Set_Casing (Mixed_Case);
Set_Msg_Name_Buffer;
Set_Msg_Char ('.');
Set_Casing (Mixed_Case);
Set_Msg_Node (Ent);
Add_Class;
Set_Msg_Quote;
-- All other types display as "type name" defined at line xxx
-- possibly qualified if qualification is requested.
else
Set_Msg_Quote;
Set_Qualification (Error_Msg_Qual_Level, Ent);
Set_Msg_Node (Ent);
Add_Class;
Set_Msg_Quote;
end if;
-- If the original type did not come from a predefined
-- file, add the location where the type was defined.
if Sloc (Error_Msg_Node_1) > Standard_Location
and then
not Is_Predefined_File_Name
(Unit_File_Name (Get_Source_Unit (Error_Msg_Node_1)))
then
Set_Msg_Str (" defined");
Set_Msg_Insertion_Line_Number (Sloc (Error_Msg_Node_1), Flag);
-- If it did come from a predefined file, deal with the case where
-- this was a file with a generic instantiation from elsewhere.
else
if Sloc (Error_Msg_Node_1) > Standard_Location then
declare
Iloc : constant Source_Ptr :=
Instantiation_Location (Sloc (Error_Msg_Node_1));
begin
if Iloc /= No_Location
and then not Suppress_Instance_Location
then
Set_Msg_Str (" from instance");
Set_Msg_Insertion_Line_Number (Iloc, Flag);
end if;
end;
end if;
end if;
end Set_Msg_Insertion_Type_Reference;
---------------------------------
-- Set_Msg_Insertion_Unit_Name --
---------------------------------
procedure Set_Msg_Insertion_Unit_Name is
begin
if Error_Msg_Unit_1 = No_Name then
null;
elsif Error_Msg_Unit_1 = Error_Name then
Set_Msg_Blank;
Set_Msg_Str ("<error>");
else
Get_Unit_Name_String (Error_Msg_Unit_1);
Set_Msg_Blank;
Set_Msg_Quote;
Set_Msg_Name_Buffer;
Set_Msg_Quote;
end if;
-- The following assignment ensures that a second percent insertion
-- character will correspond to the Error_Msg_Unit_2 parameter. We
-- suppress possible validity checks in case operating in -gnatVa mode,
-- and Error_Msg_Unit_2 is not needed and has not been set.
declare
pragma Suppress (Range_Check);
begin
Error_Msg_Unit_1 := Error_Msg_Unit_2;
end;
end Set_Msg_Insertion_Unit_Name;
------------------
-- Set_Msg_Node --
------------------
procedure Set_Msg_Node (Node : Node_Id) is
Ent : Entity_Id;
Nam : Name_Id;
begin
if Nkind (Node) = N_Designator then
Set_Msg_Node (Name (Node));
Set_Msg_Char ('.');
Set_Msg_Node (Identifier (Node));
return;
elsif Nkind (Node) = N_Defining_Program_Unit_Name then
Set_Msg_Node (Name (Node));
Set_Msg_Char ('.');
Set_Msg_Node (Defining_Identifier (Node));
return;
elsif Nkind (Node) = N_Selected_Component then
Set_Msg_Node (Prefix (Node));
Set_Msg_Char ('.');
Set_Msg_Node (Selector_Name (Node));
return;
end if;
-- The only remaining possibilities are identifiers, defining
-- identifiers, pragmas, and pragma argument associations, i.e.
-- nodes that have a Chars field.
-- Internal names generally represent something gone wrong. An exception
-- is the case of internal type names, where we try to find a reasonable
-- external representation for the external name
if Is_Internal_Name (Chars (Node))
and then
((Is_Entity_Name (Node)
and then Present (Entity (Node))
and then Is_Type (Entity (Node)))
or else
(Nkind (Node) = N_Defining_Identifier and then Is_Type (Node)))
then
if Nkind (Node) = N_Identifier then
Ent := Entity (Node);
else
Ent := Node;
end if;
Unwind_Internal_Type (Ent);
Nam := Chars (Ent);
else
Nam := Chars (Node);
end if;
-- At this stage, the name to output is in Nam
Get_Unqualified_Decoded_Name_String (Nam);
-- Remove trailing upper case letters from the name (useful for
-- dealing with some cases of internal names.
while Name_Len > 1 and then Name_Buffer (Name_Len) in 'A' .. 'Z' loop
Name_Len := Name_Len - 1;
end loop;
-- If we have any of the names from standard that start with the
-- characters "any " (e.g. Any_Type), then kill the message since
-- almost certainly it is a junk cascaded message.
if Name_Len > 4
and then Name_Buffer (1 .. 4) = "any "
then
Kill_Message := True;
end if;
-- Now we have to set the proper case. If we have a source location
-- then do a check to see if the name in the source is the same name
-- as the name in the Names table, except for possible differences
-- in case, which is the case when we can copy from the source.
declare
Src_Loc : constant Source_Ptr := Sloc (Error_Msg_Node_1);
Sbuffer : Source_Buffer_Ptr;
Ref_Ptr : Integer;
Src_Ptr : Source_Ptr;
begin
Ref_Ptr := 1;
Src_Ptr := Src_Loc;
-- For standard locations, always use mixed case
if Src_Loc <= No_Location
or else Sloc (Node) <= No_Location
then
Set_Casing (Mixed_Case);
else
-- Determine if the reference we are dealing with corresponds
-- to text at the point of the error reference. This will often
-- be the case for simple identifier references, and is the case
-- where we can copy the spelling from the source.
Sbuffer := Source_Text (Get_Source_File_Index (Src_Loc));
while Ref_Ptr <= Name_Len loop
exit when
Fold_Lower (Sbuffer (Src_Ptr)) /=
Fold_Lower (Name_Buffer (Ref_Ptr));
Ref_Ptr := Ref_Ptr + 1;
Src_Ptr := Src_Ptr + 1;
end loop;
-- If we get through the loop without a mismatch, then output
-- the name the way it is spelled in the source program
if Ref_Ptr > Name_Len then
Src_Ptr := Src_Loc;
for J in 1 .. Name_Len loop
Name_Buffer (J) := Sbuffer (Src_Ptr);
Src_Ptr := Src_Ptr + 1;
end loop;
-- Otherwise set the casing using the default identifier casing
else
Set_Casing (Identifier_Casing (Flag_Source), Mixed_Case);
end if;
end if;
end;
Set_Msg_Name_Buffer;
Add_Class;
end Set_Msg_Node;
------------------
-- Set_Msg_Text --
------------------
procedure Set_Msg_Text (Text : String; Flag : Source_Ptr) is
C : Character; -- Current character
P : Natural; -- Current index;
begin
Manual_Quote_Mode := False;
Is_Unconditional_Msg := False;
Msglen := 0;
Flag_Source := Get_Source_File_Index (Flag);
P := Text'First;
while P <= Text'Last loop
C := Text (P);
P := P + 1;
-- Check for insertion character
case C is
when '%' =>
Set_Msg_Insertion_Name;
when '$' =>
Set_Msg_Insertion_Unit_Name;
when '{' =>
Set_Msg_Insertion_File_Name;
when '}' =>
Set_Msg_Insertion_Type_Reference (Flag);
when '*' =>
Set_Msg_Insertion_Reserved_Name;
when '&' =>
Set_Msg_Insertion_Node;
when '#' =>
Set_Msg_Insertion_Line_Number (Error_Msg_Sloc, Flag);
when '\' =>
Continuation := True;
when '@' =>
Set_Msg_Insertion_Column;
when '>' =>
Set_Msg_Insertion_Run_Time_Name;
when '^' =>
Set_Msg_Insertion_Uint;
when '`' =>
Manual_Quote_Mode := not Manual_Quote_Mode;
Set_Msg_Char ('"');
when '!' =>
Is_Unconditional_Msg := True;
when '?' =>
null; -- already dealt with
when '<' =>
null; -- already dealt with
when '|' =>
null; -- already dealt with
when ''' =>
Set_Msg_Char (Text (P));
P := P + 1;
-- Upper case letter
when 'A' .. 'Z' =>
-- Start of reserved word if two or more
if P <= Text'Last and then Text (P) in 'A' .. 'Z' then
P := P - 1;
Set_Msg_Insertion_Reserved_Word (Text, P);
-- Single upper case letter is just inserted
else
Set_Msg_Char (C);
end if;
-- Normal character with no special treatment
when others =>
Set_Msg_Char (C);
end case;
end loop;
VMS_Convert;
end Set_Msg_Text;
----------------
-- Set_Posted --
----------------
procedure Set_Posted (N : Node_Id) is
P : Node_Id;
begin
if Is_Serious_Error then
-- We always set Error_Posted on the node itself
Set_Error_Posted (N);
-- If it is a subexpression, then set Error_Posted on parents
-- up to and including the first non-subexpression construct. This
-- helps avoid cascaded error messages within a single expression.
P := N;
loop
P := Parent (P);
exit when No (P);
Set_Error_Posted (P);
exit when Nkind (P) not in N_Subexpr;
end loop;
-- A special check, if we just posted an error on an attribute
-- definition clause, then also set the entity involved as posted.
-- For example, this stops complaining about the alignment after
-- complaining about the size, which is likely to be useless.
if Nkind (P) = N_Attribute_Definition_Clause then
if Is_Entity_Name (Name (P)) then
Set_Error_Posted (Entity (Name (P)));
end if;
end if;
end if;
end Set_Posted;
-----------------------
-- Set_Qualification --
-----------------------
procedure Set_Qualification (N : Nat; E : Entity_Id) is
begin
if N /= 0 and then Scope (E) /= Standard_Standard then
Set_Qualification (N - 1, Scope (E));
Set_Msg_Node (Scope (E));
Set_Msg_Char ('.');
end if;
end Set_Qualification;
------------------------
-- Special_Msg_Delete --
------------------------
function Special_Msg_Delete
(Msg : String;
N : Node_Or_Entity_Id;
E : Node_Or_Entity_Id) return Boolean
is
begin
-- Never delete messages in -gnatdO mode
if Debug_Flag_OO then
return False;
-- When an atomic object refers to a non-atomic type in the same
-- scope, we implicitly make the type atomic. In the non-error
-- case this is surely safe (and in fact prevents an error from
-- occurring if the type is not atomic by default). But if the
-- object cannot be made atomic, then we introduce an extra junk
-- message by this manipulation, which we get rid of here.
-- We identify this case by the fact that it references a type for
-- which Is_Atomic is set, but there is no Atomic pragma setting it.
elsif Msg = "atomic access to & cannot be guaranteed"
and then Is_Type (E)
and then Is_Atomic (E)
and then No (Get_Rep_Pragma (E, Name_Atomic))
then
return True;
-- When a size is wrong for a frozen type there is no explicit
-- size clause, and other errors have occurred, suppress the
-- message, since it is likely that this size error is a cascaded
-- result of other errors. The reason we eliminate unfrozen types
-- is that messages issued before the freeze type are for sure OK.
elsif Msg = "size for& too small, minimum allowed is ^"
and then Is_Frozen (E)
and then Serious_Errors_Detected > 0
and then Nkind (N) /= N_Component_Clause
and then Nkind (Parent (N)) /= N_Component_Clause
and then
No (Get_Attribute_Definition_Clause (E, Attribute_Size))
and then
No (Get_Attribute_Definition_Clause (E, Attribute_Object_Size))
and then
No (Get_Attribute_Definition_Clause (E, Attribute_Value_Size))
then
return True;
-- All special tests complete, so go ahead with message
else
return False;
end if;
end Special_Msg_Delete;
--------------------------
-- Unwind_Internal_Type --
--------------------------
procedure Unwind_Internal_Type (Ent : in out Entity_Id) is
Derived : Boolean := False;
Mchar : Character;
Old_Ent : Entity_Id;
begin
-- Undo placement of a quote, since we will put it back later
Mchar := Msg_Buffer (Msglen);
if Mchar = '"' then
Msglen := Msglen - 1;
end if;
-- The loop here deals with recursive types, we are trying to
-- find a related entity that is not an implicit type. Note
-- that the check with Old_Ent stops us from getting "stuck".
-- Also, we don't output the "type derived from" message more
-- than once in the case where we climb up multiple levels.
loop
Old_Ent := Ent;
-- Implicit access type, use directly designated type
if Is_Access_Type (Ent) then
Set_Msg_Str ("access to ");
Ent := Directly_Designated_Type (Ent);
-- Classwide type
elsif Is_Class_Wide_Type (Ent) then
Class_Flag := True;
Ent := Root_Type (Ent);
-- Use base type if this is a subtype
elsif Ent /= Base_Type (Ent) then
Buffer_Remove ("type ");
-- Avoid duplication "subtype of subtype of", and also replace
-- "derived from subtype of" simply by "derived from"
if not Buffer_Ends_With ("subtype of ")
and then not Buffer_Ends_With ("derived from ")
then
Set_Msg_Str ("subtype of ");
end if;
Ent := Base_Type (Ent);
-- If this is a base type with a first named subtype, use the
-- first named subtype instead. This is not quite accurate in
-- all cases, but it makes too much noise to be accurate and
-- add 'Base in all cases. Note that we only do this is the
-- first named subtype is not itself an internal name. This
-- avoids the obvious loop (subtype->basetype->subtype) which
-- would otherwise occur!)
elsif Present (Freeze_Node (Ent))
and then Present (First_Subtype_Link (Freeze_Node (Ent)))
and then
not Is_Internal_Name
(Chars (First_Subtype_Link (Freeze_Node (Ent))))
then
Ent := First_Subtype_Link (Freeze_Node (Ent));
-- Otherwise use root type
else
if not Derived then
Buffer_Remove ("type ");
-- Test for "subtype of type derived from" which seems
-- excessive and is replaced by simply "type derived from"
Buffer_Remove ("subtype of");
-- Avoid duplication "type derived from type derived from"
if not Buffer_Ends_With ("type derived from ") then
Set_Msg_Str ("type derived from ");
end if;
Derived := True;
end if;
Ent := Etype (Ent);
end if;
-- If we are stuck in a loop, get out and settle for the internal
-- name after all. In this case we set to kill the message if it
-- is not the first error message (we really try hard not to show
-- the dirty laundry of the implementation to the poor user!)
if Ent = Old_Ent then
Kill_Message := True;
exit;
end if;
-- Get out if we finally found a non-internal name to use
exit when not Is_Internal_Name (Chars (Ent));
end loop;
if Mchar = '"' then
Set_Msg_Char ('"');
end if;
end Unwind_Internal_Type;
-----------------
-- VMS_Convert --
-----------------
procedure VMS_Convert is
P : Natural;
L : Natural;
N : Natural;
begin
if not OpenVMS then
return;
end if;
P := Msg_Buffer'First;
loop
if P >= Msglen then
return;
end if;
if Msg_Buffer (P) = '-' then
for G in Gnames'Range loop
L := Gnames (G)'Length;
-- See if we have "-ggg switch", where ggg is Gnames entry
if P + L + 7 <= Msglen
and then Msg_Buffer (P + 1 .. P + L) = Gnames (G).all
and then Msg_Buffer (P + L + 1 .. P + L + 7) = " switch"
then
-- Replace by "/vvv qualifier", where vvv is Vnames entry
N := Vnames (G)'Length;
Msg_Buffer (P + N + 11 .. Msglen + N - L + 3) :=
Msg_Buffer (P + L + 8 .. Msglen);
Msg_Buffer (P) := '/';
Msg_Buffer (P + 1 .. P + N) := Vnames (G).all;
Msg_Buffer (P + N + 1 .. P + N + 10) := " qualifier";
P := P + N + 10;
Msglen := Msglen + N - L + 3;
exit;
end if;
end loop;
end if;
P := P + 1;
end loop;
end VMS_Convert;
end Errout;