(* M2Scope.def derive the subset of quadruples for each scope.

Copyright (C) 2003-2023 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 M2Scope ;

(*
    Title      : M2Scope
    Author     : Gaius Mulley
    System     : GNU Modula-2
    Date       : Wed Aug 13 16:04:38 2003
    Revision   : $Version$
    Description: provides a set of methods to derive the subset of quadruples
                 which were generated within a scope.
*)

EXPORT QUALIFIED ScopeBlock, ScopeProcedure,
                 InitScopeBlock, KillScopeBlock,
                 ForeachScopeBlockDo ;

TYPE
   ScopeBlock ;
   ScopeProcedure = PROCEDURE (CARDINAL, CARDINAL) ;


(*
   InitScopeBlock - creates a scope block containing all quadruples for the outer, scope.
*)

PROCEDURE InitScopeBlock (scope: CARDINAL) : ScopeBlock ;


(*
   KillScopeBlock - destroys the ScopeBlock sb and assign sb to NIL.
*)

PROCEDURE KillScopeBlock (VAR sb: ScopeBlock) ;


(*
   ForeachScopeBlockDo - calls a procedure, p, for each block of contigeous quadruples
                         defining an outer scope, sb.
*)

PROCEDURE ForeachScopeBlockDo (sb: ScopeBlock; p: ScopeProcedure) ;


END M2Scope.