103 lines
4.7 KiB
Objective-C
103 lines
4.7 KiB
Objective-C
// RUN: %clang_cc1 -fsyntax-only -Wno-everything -Wobjc-literal-compare "-Dnil=((id)0)" -verify %s
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// RUN: %clang_cc1 -fsyntax-only -Wno-everything -Wobjc-literal-compare "-Dnil=(id)0" -verify %s
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// RUN: %clang_cc1 -fsyntax-only -Wno-everything -Wobjc-literal-compare "-Dnil=0" -verify %s
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// RUN: %clang_cc1 -fsyntax-only -Wno-everything -Wobjc-literal-compare -fobjc-arc "-Dnil=((id)0)" -verify %s
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// RUN: %clang_cc1 -fsyntax-only -Wno-everything -Wobjc-literal-compare -fobjc-arc "-Dnil=(id)0" -verify %s
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// RUN: %clang_cc1 -fsyntax-only -Wno-everything -Wobjc-literal-compare -fobjc-arc "-Dnil=0" -verify %s
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// (test the warning flag as well)
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typedef signed char BOOL;
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@interface BaseObject
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+ (instancetype)new;
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@end
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@interface NSObject : BaseObject
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- (BOOL)isEqual:(id)other;
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@end
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@interface NSNumber : NSObject
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+ (NSNumber *)numberWithInt:(int)value;
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+ (NSNumber *)numberWithDouble:(double)value;
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+ (NSNumber *)numberWithBool:(BOOL)value;
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@end
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@interface NSArray : NSObject
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+ (id)arrayWithObjects:(const id [])objects count:(unsigned long)cnt;
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@end
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@interface NSDictionary : NSObject
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+ (id)dictionaryWithObjects:(const id [])objects forKeys:(const id [])keys count:(unsigned long)cnt;
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@end
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@interface NSString : NSObject
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@end
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void testComparisonsWithFixits(id obj) {
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if (obj == @"") return; // expected-warning{{direct comparison of a string literal has undefined behavior}} expected-note{{use 'isEqual:' instead}}
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if (obj != @"") return; // expected-warning{{direct comparison of a string literal has undefined behavior}} expected-note{{use 'isEqual:' instead}}
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if (@"" == obj) return; // expected-warning{{direct comparison of a string literal has undefined behavior}} expected-note{{use 'isEqual:' instead}}
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if (@"" == @"") return; // expected-warning{{direct comparison of a string literal has undefined behavior}} expected-note{{use 'isEqual:' instead}}
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if (@[] == obj) return; // expected-warning{{direct comparison of an array literal has undefined behavior}} expected-note{{use 'isEqual:' instead}}
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if (@{} == obj) return; // expected-warning{{direct comparison of a dictionary literal has undefined behavior}} expected-note{{use 'isEqual:' instead}}
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if (@12 == obj) return; // expected-warning{{direct comparison of a numeric literal has undefined behavior}} expected-note{{use 'isEqual:' instead}}
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if (@1.0 == obj) return; // expected-warning{{direct comparison of a numeric literal has undefined behavior}} expected-note{{use 'isEqual:' instead}}
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if (@__objc_yes == obj) return; // expected-warning{{direct comparison of a numeric literal has undefined behavior}} expected-note{{use 'isEqual:' instead}}
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if (@(1+1) == obj) return; // expected-warning{{direct comparison of a boxed expression has undefined behavior}} expected-note{{use 'isEqual:' instead}}
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}
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@interface BadEqualReturnString : NSString
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- (void)isEqual:(id)other;
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@end
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@interface BadEqualArgString : NSString
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- (BOOL)isEqual:(int)other;
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@end
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void testComparisonsWithoutFixits() {
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if ([BaseObject new] == @"") return; // expected-warning{{direct comparison of a string literal has undefined behavior}}
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if ([BadEqualReturnString new] == @"") return; // expected-warning{{direct comparison of a string literal has undefined behavior}}
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if ([BadEqualArgString new] == @"") return; // expected-warning{{direct comparison of a string literal has undefined behavior}}
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if (@"" < @"") return; // expected-warning{{direct comparison of a string literal has undefined behavior}}
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if (@"" > @"") return; // expected-warning{{direct comparison of a string literal has undefined behavior}}
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if (@"" <= @"") return; // expected-warning{{direct comparison of a string literal has undefined behavior}}
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if (@"" >= @"") return; // expected-warning{{direct comparison of a string literal has undefined behavior}}
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}
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#pragma clang diagnostic push
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#pragma clang diagnostic ignored "-Wobjc-string-compare"
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void testWarningFlags(id obj) {
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if (obj == @"") return; // no-warning
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if (@"" == obj) return; // no-warning
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if (obj == @1) return; // expected-warning{{direct comparison of a numeric literal has undefined behavior}} expected-note{{use 'isEqual:' instead}}
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if (@1 == obj) return; // expected-warning{{direct comparison of a numeric literal has undefined behavior}} expected-note{{use 'isEqual:' instead}}
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}
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#pragma clang diagnostic pop
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void testNilComparison() {
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// Don't warn when comparing to nil in a macro.
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#define RETURN_IF_NIL(x) if (x == nil || nil == x) return
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RETURN_IF_NIL(@"");
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RETURN_IF_NIL(@1);
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RETURN_IF_NIL(@1.0);
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RETURN_IF_NIL(@[]);
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RETURN_IF_NIL(@{});
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RETURN_IF_NIL(@__objc_yes);
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RETURN_IF_NIL(@(1+1));
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}
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void PR15257(Class c) {
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return c == @""; // expected-warning{{direct comparison of a string literal has undefined behavior}}
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}
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