| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT COMPILER COMPONENTS -- |
| -- -- |
| -- E X P _ C H 3 -- |
| -- -- |
| -- S p e c -- |
| -- -- |
| -- Copyright (C) 1992-2005, 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. -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| -- Expand routines for chapter 3 constructs |
| |
| with Types; use Types; |
| with Elists; use Elists; |
| with Uintp; use Uintp; |
| |
| package Exp_Ch3 is |
| |
| procedure Expand_N_Object_Declaration (N : Node_Id); |
| procedure Expand_N_Subtype_Indication (N : Node_Id); |
| procedure Expand_N_Variant_Part (N : Node_Id); |
| procedure Expand_N_Full_Type_Declaration (N : Node_Id); |
| |
| procedure Expand_Previous_Access_Type (Def_Id : Entity_Id); |
| -- For a full type declaration that contains tasks, or that is a task, |
| -- check whether there exists an access type whose designated type is an |
| -- incomplete declarations for the current composite type. If so, build the |
| -- master for that access type, now that it is known to denote an object |
| -- with tasks. |
| |
| procedure Expand_Record_Extension (T : Entity_Id; Def : Node_Id); |
| -- Add a field _parent in the extension part of the record |
| |
| procedure Build_Class_Wide_Master (T : Entity_Id); |
| -- For access to class-wide limited types we must build a task master |
| -- because some subsequent extension may add a task component. To avoid |
| -- bringing in the tasking run-time whenever an access-to-class-wide |
| -- limited type is used, we use the soft-link mechanism and add a level of |
| -- indirection to calls to routines that manipulate Master_Ids. This must |
| -- also be used for anonymous access types whose designated type is a task |
| -- or synchronized interface. |
| |
| procedure Build_Discr_Checking_Funcs (N : Node_Id); |
| -- Builds function which checks whether the component name is consistent |
| -- with the current discriminants. N is the full type declaration node, |
| -- and the discriminant checking functions are inserted after this node. |
| |
| function Build_Initialization_Call |
| (Loc : Source_Ptr; |
| Id_Ref : Node_Id; |
| Typ : Entity_Id; |
| In_Init_Proc : Boolean := False; |
| Enclos_Type : Entity_Id := Empty; |
| Discr_Map : Elist_Id := New_Elmt_List; |
| With_Default_Init : Boolean := False) return List_Id; |
| -- Builds a call to the initialization procedure of the Id entity. Id_Ref |
| -- is either a new reference to Id (for record fields), or an indexed |
| -- component (for array elements). Loc is the source location for the |
| -- constructed tree, and Typ is the type of the entity (the initialization |
| -- procedure of the base type is the procedure that actually gets called). |
| -- In_Init_Proc has to be set to True when the call is itself in an init |
| -- proc in order to enable the use of discriminals. Enclos_type is the type |
| -- of the init proc and it is used for various expansion cases including |
| -- the case where Typ is a task type which is a array component, the |
| -- indices of the enclosing type are used to build the string that |
| -- identifies each task at runtime. |
| -- |
| -- Discr_Map is used to replace discriminants by their discriminals in |
| -- expressions used to constrain record components. In the presence of |
| -- entry families bounded by discriminants, protected type discriminants |
| -- can appear within expressions in array bounds (not as stand-alone |
| -- identifiers) and a general replacement is necessary. |
| -- |
| -- Ada 2005 (AI-287): With_Default_Init is used to indicate that the |
| -- initialization call corresponds to a default initialized component |
| -- of an aggregate. |
| |
| function Freeze_Type (N : Node_Id) return Boolean; |
| -- This function executes the freezing actions associated with the given |
| -- freeze type node N and returns True if the node is to be deleted. We |
| -- delete the node if it is present just for front end purpose and we don't |
| -- want Gigi to see the node. This function can't delete the node itself |
| -- since it would confuse any remaining processing of the freeze node. |
| |
| function Needs_Simple_Initialization (T : Entity_Id) return Boolean; |
| -- Certain types need initialization even though there is no specific |
| -- initialization routine. In this category are access types (which need |
| -- initializing to null), packed array types whose implementation is a |
| -- modular type, and all scalar types if Normalize_Scalars is set, as well |
| -- as private types whose underlying type is present and meets any of these |
| -- criteria. Finally, descendants of String and Wide_String also need |
| -- initialization in Initialize/Normalize_Scalars mode. |
| |
| function Get_Simple_Init_Val |
| (T : Entity_Id; |
| Loc : Source_Ptr; |
| Size : Uint := No_Uint) return Node_Id; |
| -- For a type which Needs_Simple_Initialization (see above), prepares the |
| -- tree for an expression representing the required initial value. Loc is |
| -- the source location used in constructing this tree which is returned as |
| -- the result of the call. The Size parameter indicates the target size of |
| -- the object if it is known (indicated by a value that is not No_Uint and |
| -- is greater than zero). If Size is not given (Size set to No_Uint, or |
| -- non-positive), then the Esize of T is used as an estimate of the Size. |
| -- The object size is needed to prepare a known invalid value for use by |
| -- Normalize_Scalars. |
| |
| end Exp_Ch3; |
