(* m2except.def provides an interface to build exception trees.

Copyright (C) 2008-2023 Free Software Foundation, Inc.
Contributed by Gaius Mulley <gaius.mulley@southwales.ac.uk>.

This file is part of GNU Modula-2.

GNU Modula-2 is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.

GNU Modula-2 is distributed in the hope that it will be useful, but
WITHOUT 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
along with GNU Modula-2; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.  *)

DEFINITION MODULE FOR "C" m2except ;

FROM m2tree IMPORT Tree ;
FROM m2linemap IMPORT location_t ;


(*
   InitExceptions - initialize this module, it declares the
                    external functions and assigns them to
                    the appropriate global tree variables.
*)

PROCEDURE InitExceptions (location: location_t) ;


(*
   BuildThrow - builds a throw statement and return the tree.
*)

PROCEDURE BuildThrow (location: location_t; t: Tree) : Tree ;


(*
    BuildTryBegin - returns a tree representing the 'try' block.
*)

PROCEDURE BuildTryBegin (location: location_t) : Tree ;


(*
   BuildTryEnd - builds the end of the Try block and prepares
                 for the catch handlers.
*)

PROCEDURE BuildTryEnd (tryBlock: Tree) ;


(*
   BuildCatchBegin - creates a handler tree for the C++
                     statement 'catch (...) {'.
                     It returns the handler tree.
*)

PROCEDURE BuildCatchBegin (location: location_t) : Tree ;


(*
   BuildCatchEnd - completes a try catch block.
                   It returns the, try_block, tree.
                   It creates the C++ statement

                   '}' which matches the catch above.
*)

PROCEDURE BuildCatchEnd (location: location_t; handler, tryBlock: Tree) : Tree ;


END m2except.