1------------------------------------------------------------------------------
2--                                                                          --
3--                         GNAT COMPILER COMPONENTS                         --
4--                                                                          --
5--                             E X P _ C H 1 1                              --
6--                                                                          --
7--                                 S p e c                                  --
8--                                                                          --
9--          Copyright (C) 1992-2013, Free Software Foundation, Inc.         --
10--                                                                          --
11-- GNAT is free software;  you can  redistribute it  and/or modify it under --
12-- terms of the  GNU General Public License as published  by the Free Soft- --
13-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
14-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
15-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
16-- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
17-- for  more details.  You should have  received  a copy of the GNU General --
18-- Public License  distributed with GNAT; see file COPYING3.  If not, go to --
19-- http://www.gnu.org/licenses for a complete copy of the license.          --
20--                                                                          --
21-- GNAT was originally developed  by the GNAT team at  New York University. --
22-- Extensive contributions were provided by Ada Core Technologies Inc.      --
23--                                                                          --
24------------------------------------------------------------------------------
25
26--  Expand routines for chapter 11 constructs
27
28with Types; use Types;
29
30package Exp_Ch11 is
31   procedure Expand_N_Exception_Declaration          (N : Node_Id);
32   procedure Expand_N_Handled_Sequence_Of_Statements (N : Node_Id);
33   procedure Expand_N_Raise_Constraint_Error         (N : Node_Id);
34   procedure Expand_N_Raise_Expression               (N : Node_Id);
35   procedure Expand_N_Raise_Program_Error            (N : Node_Id);
36   procedure Expand_N_Raise_Statement                (N : Node_Id);
37   procedure Expand_N_Raise_Storage_Error            (N : Node_Id);
38
39   --  Data structures for gathering information to build exception tables
40   --  See runtime routine Ada.Exceptions for full details on the format and
41   --  content of these tables.
42
43   procedure Expand_At_End_Handler (HSS : Node_Id; Block : Node_Id);
44   --  Given a handled statement sequence, HSS, for which the At_End_Proc
45   --  field is set, and which currently has no exception handlers, this
46   --  procedure expands the special exception handler required.
47   --  This procedure also create a new scope for the given Block, if
48   --  Block is not Empty.
49
50   procedure Expand_Exception_Handlers (HSS : Node_Id);
51   --  This procedure expands exception handlers, and is called as part
52   --  of the processing for Expand_N_Handled_Sequence_Of_Statements and
53   --  is also called from Expand_At_End_Handler. N is the handled sequence
54   --  of statements that has the exception handler(s) to be expanded. This
55   --  is also called to expand the special exception handler built for
56   --  accept bodies (see Exp_Ch9.Build_Accept_Body).
57
58   function Find_Local_Handler
59     (Ename : Entity_Id;
60      Nod   : Node_Id) return Node_Id;
61   --  This function searches for a local exception handler that will handle
62   --  the exception named by Ename. If such a local hander exists, then the
63   --  corresponding N_Exception_Handler is returned. If no such handler is
64   --  found then Empty is returned. In order to match and return True, the
65   --  handler may not have a choice parameter specification. Nod is the raise
66   --  node that references the handler.
67
68   function Get_Local_Raise_Call_Entity return Entity_Id;
69   --  This function is provided for use by the back end in conjunction with
70   --  generation of Local_Raise calls when an exception raise is converted to
71   --  a goto statement. If Local_Raise is defined, its entity is returned,
72   --  if not, Empty is returned (in which case the call is silently skipped).
73
74   function Get_RT_Exception_Entity (R : RT_Exception_Code) return Entity_Id;
75   --  This function is provided for use by the back end in conjunction with
76   --  generation of Local_Raise calls when an exception raise is converted to
77   --  a goto statement. The argument is the reason code which would be used
78   --  to determine which Rcheck_nn procedure to call. The returned result is
79   --  the exception entity to be passed to Local_Raise.
80
81   procedure Get_RT_Exception_Name (Code : RT_Exception_Code);
82   --  This procedure is provided for use by the back end to obtain the name of
83   --  the Rcheck procedure for Code. The name is appended to Namet.Name_Buffer
84   --  without the __gnat_rcheck_ prefix.
85
86   function Is_Non_Ada_Error (E : Entity_Id) return Boolean;
87   --  This function is provided for Gigi use. It returns True if operating on
88   --  VMS, and the argument E is the entity for System.Aux_Dec.Non_Ada_Error.
89   --  This is used to generate the special matching code for this exception.
90
91   procedure Possible_Local_Raise (N : Node_Id; E : Entity_Id);
92   --  This procedure is called whenever node N might cause the back end
93   --  to generate a local raise for a local Constraint/Program/Storage_Error
94   --  exception. It deals with generating a warning if there is no local
95   --  handler (and restriction No_Exception_Propagation is set), or if there
96   --  is a local handler marking that it has a local raise. E is the entity
97   --  of the corresponding exception.
98
99end Exp_Ch11;
100