warn-objc-literal-conversion.mm
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// RUN: %clang_cc1 -fsyntax-only -verify -Wobjc-literal-conversion %s
@class NSString;
@interface NSNumber
+ (NSNumber *)numberWithChar:(char)value;
+ (NSNumber *)numberWithInt:(int)value;
+ (NSNumber *)numberWithLongLong:(long long)value;
+ (NSNumber *)numberWithFloat:(float)value;
+ (NSNumber *)numberWithDouble:(double)value;
+ (NSNumber *)numberWithBool:(bool)value;
@end
@interface NSArray
+ (id)arrayWithObjects:(const id [])objects count:(int)cnt;
@end
@interface NSDictionary
+ (id)dictionaryWithObjects:(const id [])objects forKeys:(const id [])keys count:(unsigned long)cnt;
@end
void char_test() {
if (@'a') {}
// expected-warning@-1{{implicit boolean conversion of Objective-C object literal always evaluates to true}}
}
void int_test() {
if (@12) {}
// expected-warning@-1{{implicit boolean conversion of Objective-C object literal always evaluates to true}}
if (@-12) {}
// expected-warning@-1{{implicit boolean conversion of Objective-C object literal always evaluates to true}}
if (@12LL) {}
// expected-warning@-1{{implicit boolean conversion of Objective-C object literal always evaluates to true}}
if (@-12LL) {}
// expected-warning@-1{{implicit boolean conversion of Objective-C object literal always evaluates to true}}
}
void float_test() {
if (@12.55) {}
// expected-warning@-1{{implicit boolean conversion of Objective-C object literal always evaluates to true}}
if (@-12.55) {}
// expected-warning@-1{{implicit boolean conversion of Objective-C object literal always evaluates to true}}
if (@12.55F) {}
// expected-warning@-1{{implicit boolean conversion of Objective-C object literal always evaluates to true}}
if (@-12.55F) {}
// expected-warning@-1{{implicit boolean conversion of Objective-C object literal always evaluates to true}}
}
void bool_test() {
if (@true) {}
// expected-warning@-1{{implicit boolean conversion of Objective-C object literal always evaluates to true}}
if (@false) {}
// expected-warning@-1{{implicit boolean conversion of Objective-C object literal always evaluates to true}}
}
void string_test() {
if (@"asdf") {}
// expected-warning@-1{{implicit boolean conversion of Objective-C object literal always evaluates to true}}
}
void array_test() {
if (@[ @313, @331, @367, @379 ]) {}
// expected-warning@-1{{implicit boolean conversion of Objective-C object literal always evaluates to true}}
}
void dictionary_test() {
if (@{ @0: @0, @1: @1, @2: @1, @3: @3 }) {}
// expected-warning@-1{{implicit boolean conversion of Objective-C object literal always evaluates to true}}
}
void objc_bool_test () {
if (__objc_yes) {}
if (__objc_no) {}
}