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32 lines
427 B
R
32 lines
427 B
R
#include "Boolean.h"
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Boolean trueConstant;
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Boolean falseConstant;
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@implementation Boolean
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+ (void) initialize
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{
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trueConstant = [Boolean new];
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[trueConstant retain];
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falseConstant = [Boolean new];
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[falseConstant retain];
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}
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+ (id) trueConstant
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{
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return trueConstant;
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}
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+ (id) falseConstant
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{
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return falseConstant;
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}
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- (string) printForm
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{
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return self == trueConstant ? "#t" : "#f";
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}
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@end
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