FSFormulaDefinition.h

//  $Id: FSFormulaDefinition.h,v 1.1 2008/10/14 15:04:17 hns Exp $
//
//  FSFormulaDefinition.h
//  FlexiSheet
//
//  Created by Stefan Leuker on 30-SEP-2001.
//
//  Copyright (c) 2001-2004, Stefan Leuker.        All rights reserved.
//  
//  Redistribution and use in source and binary forms,  with or without
//  modification,  are permitted provided that the following conditions
//  are met:
//  
//  *  Redistributions of source code must retain the above copyright
//     notice,  this list of conditions and the following disclaimer.
//  
//  *  Redistributions  in  binary  form  must  reproduce  the  above
//     copyright notice,  this  list of conditions  and the following
//     disclaimer  in  the  documentation  and / or  other  materials
//     provided with the distribution.
//  
//  *  Neither the name  "FlexiSheet"  nor the names of its copyright
//     holders  or  contributors  may  be used  to endorse or promote
//     products  derived  from  this software  without specific prior
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//  
//  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#import <Foundation/Foundation.h>

@class FSTable, FSKeySet, FSSelection, FSFormulaSpace, FSExpression;

@interface FSFormulaDefinition : NSObject {
    NSString           *_creator;
    FSExpression       *_expression;
}

+ (FSFormulaDefinition*)formulaDefinitionWithString:(NSString*)definitionString inTable:(FSTable*)table;
- (id)initWithString:(NSString*)definitionString inTable:(FSTable*)table;

- (BOOL)isError;

- (NSArray*)validateCandidateKeySets:(NSArray*)candiates;
- (id)formulaValueForKeySet:(FSKeySet*)keySet;

- (FSSelection*)referencedSelectionInFormulaSpace:(FSFormulaSpace*)fs;

@end