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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- E X P _ C H 1 1 --
-- --
-- S p e c --
-- --
-- Copyright (C) 1992-2000 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, 59 Temple Place - Suite 330, Boston, --
-- MA 02111-1307, 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 11 constructs
with Types; use Types;
package Exp_Ch11 is
procedure Expand_N_Exception_Declaration (N : Node_Id);
procedure Expand_N_Handled_Sequence_Of_Statements (N : Node_Id);
procedure Expand_N_Raise_Constraint_Error (N : Node_Id);
procedure Expand_N_Raise_Program_Error (N : Node_Id);
procedure Expand_N_Raise_Statement (N : Node_Id);
procedure Expand_N_Raise_Storage_Error (N : Node_Id);
procedure Expand_N_Subprogram_Info (N : Node_Id);
-- Data structures for gathering information to build exception tables
-- See runtime routine Ada.Exceptions for full details on the format and
-- content of these tables.
procedure Initialize;
-- Initializes these data structures for a new main unit file
procedure Expand_At_End_Handler (HSS : Node_Id; Block : Node_Id);
-- Given a handled statement sequence, HSS, for which the At_End_Proc
-- field is set, and which currently has no exception handlers, this
-- procedure expands the special exception handler required.
-- This procedure also create a new scope for the given Block, if
-- Block is not Empty.
procedure Expand_Exception_Handlers (HSS : Node_Id);
-- This procedure expands exception handlers, and is called as part
-- of the processing for Expand_N_Handled_Sequence_Of_Statements and
-- is also called from Expand_At_End_Handler. N is the handled sequence
-- of statements that has the exception handler(s) to be expanded. This
-- is also called to expand the special exception handler built for
-- accept bodies (see Exp_Ch9.Build_Accept_Body).
procedure Generate_Unit_Exception_Table;
-- Procedure called by main driver to generate unit exception table if
-- zero cost exceptions are enabled. See System.Exceptions for details.
function Is_Non_Ada_Error (E : Entity_Id) return Boolean;
-- This function is provided for Gigi use. It returns True if operating on
-- VMS, and the argument E is the entity for System.Aux_Dec.Non_Ada_Error.
-- This is used to generate the special matching code for this exception.
procedure Remove_Handler_Entries (N : Node_Id);
-- This procedure is called when optimization circuits determine that
-- an entire subtree can be removed. If the subtree contains handler
-- entries in zero cost exception mode, then such removal can lead to
-- dangling references to non-existent handlers in the handler table.
-- This procedure removes such references.
--------------------------------------
-- Subprogram_Descriptor Generation --
--------------------------------------
-- Subprogram descriptors are required for all subprograms, including
-- explicit subprograms defined in the program, subprograms that are
-- imported via pragma Import, and also for the implicit elaboration
-- subprograms used to elaborate package specs and bodies.
procedure Generate_Subprogram_Descriptor_For_Package
(N : Node_Id;
Spec : Entity_Id);
-- This is used to create a descriptor for the implicit elaboration
-- procedure for a package spec of body. The compiler only generates
-- such descriptors if the package spec or body contains exception
-- handlers (either explicitly in the case of a body, or from generic
-- package instantiations). N is the node for the package body or
-- spec, and Spec is the package body or package entity respectively.
-- N must be a compilation unit, and the descriptor is placed at
-- the end of the actions for the auxiliary compilation unit node.
procedure Generate_Subprogram_Descriptor_For_Subprogram
(N : Node_Id;
Spec : Entity_Id);
-- This is used to create a desriptor for a subprogram, both those
-- present in the source, and those implicitly generated by code
-- expansion. N is the subprogram body node, and Spec is the entity
-- for the subprogram. The descriptor is placed at the end of the
-- Last exception handler, or, if there are no handlers, at the end
-- of the statement sequence.
procedure Generate_Subprogram_Descriptor_For_Imported_Subprogram
(Spec : Entity_Id;
Slist : List_Id);
-- This is used to create a descriptor for an imported subprogram.
-- Such descriptors are needed for propagation of exceptions through
-- such subprograms. The descriptor never references any handlers,
-- and is appended to the given Slist.
end Exp_Ch11;
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