Macro fails when NSArray literals (i.e. @[]) aren't wrapped in parentheses (i.e. (@[])).

MacroFailure.m

#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 70000

#define IOS7_CODE_WITH_FALLBACK(iOS7_code, other_code) \
    do { \
        if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"7.0")) {\
            iOS7_code \
        }\
        else { \
            other_code \
        } \
    } \
    while(false)

#define IOS7_CODE(code) \
    IOS7_CODE_WITH_FALLBACK(code, ;);

#endif


#ifndef IOS7_CODE
#define IOS7_CODE(code) do {} while(false)
#endif

#ifndef IOS7_CODE_WITH_FALLBACK
#define IOS7_CODE_WITH_FALLBACK(iOS7_code, other_code) \
    do { \
        other_code \
    }\
    while(false)
#endif

- (void) brokenMethod {

  // Use of undeclared identifier 'IOS7_CODE'
  // Too many arguments provided to function-like macro invocation
  IOS7_CODE({
    // no parens around NSArray literal
    NSArray *someArray = @[];
  });
}

- (void) workingMethod {
  IOS7_CODE({
    // parens around NSArray literal
    NSArray *someArray = (@[]);
  });
}