-- Created on: 1991-07-18
-- Created by: Arnaud BOUZY
-- Copyright (c) 1991-1999 Matra Datavision
-- Copyright (c) 1999-2012 OPEN CASCADE SAS
--
-- The content of this file is subject to the Open CASCADE Technology Public
-- License Version 6.5 (the "License"). You may not use the content of this file
-- except in compliance with the License. Please obtain a copy of the License
-- at http://www.opencascade.org and read it completely before using this file.
--
-- The Initial Developer of the Original Code is Open CASCADE S.A.S., having its
-- main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France.
--
-- The Original Code and all software distributed under the License is
-- distributed on an "AS IS" basis, without warranty of any kind, and the
-- Initial Developer hereby disclaims all such warranties, including without
-- limitation, any warranties of merchantability, fitness for a particular
-- purpose or non-infringement. Please see the License for the specific terms
-- and conditions governing the rights and limitations under the License.



package ExprIntrp 

	---Purpose: Describes an interpreter for GeneralExpressions, 
	--          GeneralFunctions, and GeneralRelations defined in 
	--          package Expr. 

uses Expr, MMgt, TCollection, TColStd

is

    deferred class Generator;
    
    class GenExp;
    
    class GenFct;
    
    class GenRel;
    
    private class Analysis;
    
    class SequenceOfNamedFunction instantiates 
    	Sequence from TCollection(NamedFunction from Expr);

    class SequenceOfNamedExpression instantiates 
    	Sequence from TCollection(NamedExpression from Expr);

    exception SyntaxError inherits Failure from Standard;
    
    private class StackOfGeneralExpression instantiates 
    	Stack from TCollection (GeneralExpression from Expr);
    
    private class StackOfGeneralRelation instantiates 
    	Stack from TCollection (GeneralRelation from Expr);

    private class StackOfGeneralFunction instantiates 
    	Stack from TCollection (GeneralFunction from Expr);
        
    
    private class StackOfNames instantiates 
    	Stack from TCollection (AsciiString from TCollection);

    Parse(gen : Generator; str : AsciiString from TCollection)
    returns Boolean
    is private;
    
end ExprIntrp;