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-------------------------------------------------------------------------------
--- --
--- GNAT COMPILER COMPONENTS --
--- --
--- E X P _ C H 3 --
--- --
--- S p e c --
--- --
--- Copyright (C) 1992-2011, 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 3, 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 COPYING3. If not, go to --
--- http://www.gnu.org/licenses for a complete copy of the license. --
--- --
--- 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_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;
- Constructor_Ref : Node_Id := Empty) return List_Id;
- -- Builds a call to the initialization procedure for the base type of Typ,
- -- passing it the object denoted by Id_Ref, plus additional parameters as
- -- appropriate for the type (the _Master, for task types, for example).
- -- Loc is the source location for the constructed tree. 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 enclosing type when
- -- initializing a component in an outer init proc, and it is used for
- -- various expansion cases including the case where Typ is a task type
- -- which is an array component, the indexes 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.
- --
- -- Constructor_Ref is a call to a constructor subprogram. It is currently
- -- used only to support C++ constructors.
-
- 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.
-
- procedure Init_Secondary_Tags
- (Typ : Entity_Id;
- Target : Node_Id;
- Stmts_List : List_Id;
- Fixed_Comps : Boolean := True;
- Variable_Comps : Boolean := True);
- -- Ada 2005 (AI-251): Initialize the tags of the secondary dispatch tables
- -- of Typ. The generated code referencing tag fields of Target is appended
- -- to Stmts_List. If Fixed_Comps is True then the tag components located at
- -- fixed positions of Target are initialized; if Variable_Comps is True
- -- then tags components located at variable positions of Target are
- -- initialized.
-
- function Needs_Simple_Initialization
- (T : Entity_Id;
- Consider_IS : Boolean := True) return Boolean;
- -- Certain types need initialization even though there is no specific
- -- initialization routine:
- -- Access types (which need initializing to null)
- -- All scalar types if Normalize_Scalars mode set
- -- Descendents of standard string types if Normalize_Scalars mode set
- -- Scalar types having a Default_Value attribute
- -- Regarding Initialize_Scalars mode, this is ignored if Consider_IS is
- -- set to False, but if Consider_IS is set to True, then the cases above
- -- mentioning Normalize_Scalars also apply for Initialize_Scalars mode.
-
- function Get_Simple_Init_Val
- (T : Entity_Id;
- N : Node_Id;
- 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. N is a
- -- node whose 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. A call to this routine where T is a scalar
- -- type is only valid if we are in Normalize_Scalars or Initialize_Scalars
- -- mode, or if N is the node for a 'Invalid_Value attribute node.
-
-end Exp_Ch3;