Never-null combined assertion/assignment macro

gistfile1.m

// From https://twitter.com/tewha/status/560497711397355520

#define NEVER_NULL(a, desc, ...)	({\
do {\
    __PRAGMA_PUSH_NO_EXTRA_ARG_WARNINGS\
    if ((a) == nil) {\
        [[NSAssertionHandler currentHandler] handleFailureInMethod:_cmd\
                                                            object:self file:[NSString stringWithUTF8String:__FILE__]\
                                                        lineNumber:__LINE__ description:(desc), ##__VA_ARGS__];\
    }\
    __PRAGMA_POP_NO_EXTRA_ARG_WARNINGS\
} while(0);\
(a);\
})