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) 1992-2019, 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; Blk_Id : Entity_Id);
44   --  Given handled statement sequence HSS for which the At_End_Proc field
45   --  is set, and which currently has no exception handlers, this procedure
46   --  expands the special exception handler required. This procedure also
47   --  create a new scope for the given block, if Blk_Id is not Empty.
48
49   procedure Expand_Exception_Handlers (HSS : Node_Id);
50   --  This procedure expands exception handlers, and is called as part
51   --  of the processing for Expand_N_Handled_Sequence_Of_Statements and
52   --  is also called from Expand_At_End_Handler. N is the handled sequence
53   --  of statements that has the exception handler(s) to be expanded. This
54   --  is also called to expand the special exception handler built for
55   --  accept bodies (see Exp_Ch9.Build_Accept_Body).
56
57   function Find_Local_Handler
58     (Ename : Entity_Id;
59      Nod   : Node_Id) return Node_Id;
60   --  This function searches for a local exception handler that will handle
61   --  the exception named by Ename. If such a local hander exists, then the
62   --  corresponding N_Exception_Handler is returned. If no such handler is
63   --  found then Empty is returned. In order to match and return True, the
64   --  handler may not have a choice parameter specification. Nod is the raise
65   --  node that references the handler.
66
67   function Get_Local_Raise_Call_Entity return Entity_Id;
68   --  This function is provided for use by the back end in conjunction with
69   --  generation of Local_Raise calls when an exception raise is converted to
70   --  a goto statement. If Local_Raise is defined, its entity is returned,
71   --  if not, Empty is returned (in which case the call is silently skipped).
72
73   function Get_RT_Exception_Entity (R : RT_Exception_Code) return Entity_Id;
74   --  This function is provided for use by the back end in conjunction with
75   --  generation of Local_Raise calls when an exception raise is converted to
76   --  a goto statement. The argument is the reason code which would be used
77   --  to determine which Rcheck_nn procedure to call. The returned result is
78   --  the exception entity to be passed to Local_Raise.
79
80   procedure Get_RT_Exception_Name (Code : RT_Exception_Code);
81   --  This procedure is provided for use by the back end to obtain the name of
82   --  the Rcheck procedure for Code. The name is appended to Namet.Name_Buffer
83   --  without the __gnat_rcheck_ prefix.
84
85   procedure Possible_Local_Raise (N : Node_Id; E : Entity_Id);
86   --  This procedure is called whenever node N might cause the back end
87   --  to generate a local raise for a local Constraint/Program/Storage_Error
88   --  exception. It deals with generating a warning if there is no local
89   --  handler (and restriction No_Exception_Propagation is set), or if there
90   --  is a local handler marking that it has a local raise. E is the entity
91   --  of the corresponding exception.
92
93   procedure Warn_If_No_Local_Raise (N : Node_Id);
94   --  Called for an exception handler that is not the target of a local raise.
95   --  Issues warning if No_Exception_Propagation restriction is set. N is the
96   --  node for the handler.
97
98end Exp_Ch11;
99