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Asked: 2026-05-11T10:15:56+00:00

This test will fail: #import GTMSenTestCase.h @interface Person : NSObject @property (readonly) NSString *name;

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This test will fail:

#import 'GTMSenTestCase.h'  @interface Person : NSObject @property (readonly) NSString *name; @end @implementation Person - (NSString *)name { return @'Nick'; } @end  @interface TemplateUnitTest : GTMTestCase @end  @implementation TemplateUnitTest  static BOOL called = NO; - (Person *)get {   if (called) { STFail(nil); }   called = YES;   return [[Person new] autorelease]; }  - (void)testPropertyMakesThingGetSentTwice {   NSString *s = [[self get].name stringByAppendingString:@'foo'];   STAssertEqualObjects(@'Nickfoo', s, nil); }  @end

If I replace the [self get].name with [[self get] name], it passes. ie, Using dot-syntax, the LHS of the ‘.’ is evaluated twice. How does this happen?

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1 Answer

  1. Admitting in public that you use the dot syntax in Objective-C is likely to get you burned at the stake by the purists 😉

    It looks like it’s a bug in this particular scenario, as the thread says, it’s probably some pre-processing magic that’s expanding it wrongly.

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