| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT COMPILER COMPONENTS -- |
| -- -- |
| -- E X P _ C H 3 -- |
| -- -- |
| -- S p e c -- |
| -- -- |
| -- Copyright (C) 1992-2021, 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_Access_Subprogram_Wrapper_Body |
| (Decl : Node_Id; |
| New_Decl : Node_Id); |
| -- Build the wrapper body, which holds the indirect call through an access- |
| -- to-subprogram, and whose expansion incorporates the contracts of the |
| -- access type declaration. Called from Build_Access_Subprogram_Wrapper. |
| -- Building the wrapper is done during analysis to perform proper semantic |
| -- checks on the relevant aspects. The wrapper body could be simplified to |
| -- a null body when expansion is disabled ??? |
| |
| 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 Build_Variant_Record_Equality |
| (Typ : Entity_Id; |
| Body_Id : Entity_Id; |
| Param_Specs : List_Id) return Node_Id; |
| -- Build the body of the equality function Body_Id for the untagged variant |
| -- record Typ with the given parameters specification list. |
| |
| procedure Ensure_Activation_Chain_And_Master (Obj_Decl : Node_Id); |
| -- If tasks are being declared (or might be declared) by the given object |
| -- declaration then ensure to have an activation chain defined for the |
| -- tasks (has no effect if we already have one), and also that a Master |
| -- variable is established (and that the appropriate enclosing construct |
| -- is established as a task master). |
| |
| 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 Get_Simple_Init_Val |
| (Typ : Entity_Id; |
| N : Node_Id; |
| Size : Uint := No_Uint) return Node_Id; |
| -- Build an expression that represents the required initial value of type |
| -- Typ for which predicate Needs_Simple_Initialization is True. N is a node |
| -- whose source location is used in the construction of the expression. |
| -- Size is used as follows: |
| -- |
| -- * If the size of the object to be initialized it is known, it should |
| -- be passed to the routine. |
| -- |
| -- * If the size is unknown or is zero, then the Esize of Typ 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 Typ denotes a scalar |
| -- type is valid only when Normalize_Scalars or Initialize_Scalars is |
| -- active, or if N is the node for a 'Invalid_Value attribute node. |
| |
| function Init_Proc_Level_Formal (Proc : Entity_Id) return Entity_Id; |
| -- Fetch the extra formal from an initalization procedure "proc" |
| -- corresponding to the level of the object being initialized. When none |
| -- is present Empty is returned. |
| |
| procedure Init_Secondary_Tags |
| (Typ : Entity_Id; |
| Target : Node_Id; |
| Init_Tags_List : List_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 Init_Tags_List and the code required to complete the elaboration of |
| -- the dispatch tables of Typ 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 Make_Tag_Assignment (N : Node_Id) return Node_Id; |
| -- An object declaration that has an initialization for a tagged object |
| -- requires a separate reassignment of the tag of the given type, because |
| -- the expression may include an unchecked conversion. This tag assignment |
| -- is inserted after the declaration, but if the object has an address |
| -- clause the assignment is handled as part of the freezing of the object, |
| -- see Check_Address_Clause. |
| |
| end Exp_Ch3; |
