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-------------------------------------------------------------------------------
--- --
--- GNAT COMPILER COMPONENTS --
--- --
--- D E B U G _ A --
--- --
--- S p e c --
--- --
--- Copyright (C) 1992-2007, 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. --
--- --
-------------------------------------------------------------------------------
-
--- This package contains data and subprograms to support the A debug switch
--- that is used to generate output showing what node is being analyzed,
--- resolved, evaluated, or expanded.
-
-with Types; use Types;
-
-package Debug_A is
-
- -- Note: the following subprograms are used in a stack like manner, with
- -- an exit call matching each entry call. This means that they can keep
- -- track of the current node being worked on, with the entry call setting
- -- a new value, by pushing the Node_Id value on a stack, and the exit call
- -- popping this value off. Atree.Current_Error_Node is set by both the
- -- entry and exit routines to point to the current node so that an abort
- -- message indicates the node involved as accurately as possible.
-
- procedure Debug_A_Entry (S : String; N : Node_Id);
- pragma Inline (Debug_A_Entry);
- -- Generates a message prefixed by a sequence of bars showing the nesting
- -- depth (depth increases by 1 for a Debug_A_Entry call and is decreased
- -- by the corresponding Debug_A_Exit call). Then the string is output
- -- (analyzing, expanding etc), followed by the node number and its kind.
- -- This output is generated only if the debug A flag is set. If the debug
- -- A flag is not set, then no output is generated. This call also sets the
- -- Node_Id value in Atree.Current_Error_Node in case a bomb occurs. This
- -- is done unconditionally, whether or not the debug A flag is set.
-
- procedure Debug_A_Exit (S : String; N : Node_Id; Comment : String);
- pragma Inline (Debug_A_Exit);
- -- Generates the corresponding termination message. The message is preceded
- -- by a sequence of bars, followed by the string S, the node number, and
- -- a trailing comment (e.g. " (already evaluated)"). This output is
- -- generated only if the debug A flag is set. If the debug A flag is not
- -- set, then no output is generated. This call also resets the value in
- -- Atree.Current_Error_Node to what it was before the corresponding call
- -- to Debug_A_Entry.
-
-end Debug_A;