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-------------------------------------------------------------------------------
--- --
--- GNAT COMPILER COMPONENTS --
--- --
--- E X P _ S E L --
--- --
--- 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. --
--- --
-------------------------------------------------------------------------------
-
--- Routines used in Chapter 9 for the expansion of dispatching triggers in
--- select statements (Ada 2005: AI-345)
-
-with Types; use Types;
-
-package Exp_Sel is
-
- function Build_Abort_Block
- (Loc : Source_Ptr;
- Abr_Blk_Ent : Entity_Id;
- Cln_Blk_Ent : Entity_Id;
- Blk : Node_Id) return Node_Id;
- -- Generate:
- -- begin
- -- Blk
- -- exception
- -- when Abort_Signal => Abort_Undefer / null;
- -- end;
- -- Abr_Blk_Ent is the name of the generated block, Cln_Blk_Ent is the name
- -- of the encapsulated cleanup block, Blk is the actual block name.
- -- The exception handler code is built by Build_Abort_Block_Handler.
-
- function Build_Abort_Block_Handler (Loc : Source_Ptr) return Node_Id;
- -- Generate if front-end exception:
- -- when others =>
- -- Abort_Under;
- -- or if back-end exception:
- -- when others =>
- -- null;
- -- This is an exception handler to stop propagation of aborts, without
- -- modifying the deferal level.
-
- function Build_B
- (Loc : Source_Ptr;
- Decls : List_Id) return Entity_Id;
- -- Generate:
- -- B : Boolean := False;
- -- Append the object declaration to the list and return its defining
- -- identifier.
-
- function Build_C
- (Loc : Source_Ptr;
- Decls : List_Id) return Entity_Id;
- -- Generate:
- -- C : Ada.Tags.Prim_Op_Kind;
- -- Append the object declaration to the list and return its defining
- -- identifier.
-
- function Build_Cleanup_Block
- (Loc : Source_Ptr;
- Blk_Ent : Entity_Id;
- Stmts : List_Id;
- Clean_Ent : Entity_Id) return Node_Id;
- -- Generate:
- -- declare
- -- procedure _clean is
- -- begin
- -- ...
- -- end _clean;
- -- begin
- -- Stmts
- -- at end
- -- _clean;
- -- end;
- -- Blk_Ent is the name of the generated block, Stmts is the list of
- -- encapsulated statements and Clean_Ent is the parameter to the
- -- _clean procedure.
-
- function Build_K
- (Loc : Source_Ptr;
- Decls : List_Id;
- Obj : Entity_Id) return Entity_Id;
- -- Generate
- -- K : Ada.Tags.Tagged_Kind :=
- -- Ada.Tags.Get_Tagged_Kind (Ada.Tags.Tag (Obj));
- -- where Obj is the pointer to a secondary table. Append the object
- -- declaration to the list and return its defining identifier.
-
- function Build_S
- (Loc : Source_Ptr;
- Decls : List_Id) return Entity_Id;
- -- Generate:
- -- S : Integer;
- -- Append the object declaration to the list and return its defining
- -- identifier.
-
- function Build_S_Assignment
- (Loc : Source_Ptr;
- S : Entity_Id;
- Obj : Entity_Id;
- Call_Ent : Entity_Id) return Node_Id;
- -- Generate:
- -- S := Ada.Tags.Get_Offset_Index (
- -- Ada.Tags.Tag (Obj), DT_Position (Call_Ent));
- -- where Obj is the pointer to a secondary table, Call_Ent is the entity
- -- of the dispatching call name. Return the generated assignment.
-
-end Exp_Sel;