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------------------------------------------------------------------------------
-- --
-- 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;
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