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expressionValues.h
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1992-03-27
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/*
** expressionValues.h
** Database Kit, Release 3.0
** Copyright (c) 1992, NeXT Computer, Inc. All rights reserved.
*/
#import <objc/objc.h>
/*
** This protocol is used to build ascii expressions from the objects of the
** dbkit. isDeferredExpression is used to delay the call to expressionValue;
** it should return YES if the expressionValue/stringValue call is to be
** deferred until the last possible moment. This is useful when building
** expressions that take input from the user interface, or from objects
** that change state often.
*/
@protocol DBExpressionValues
- (const unsigned char*)expressionValue;
- (BOOL)isDeferredExpression;
@end