call return inside GCC compound statement expressions -


Can I safely use returns within the GCC compound statement expressions?

defines macros for example I 

  #define CHECK_FUNC_RESULT (func) \ ({\ int result = func (); \ if (! Result) return; \ Result; \})   
 and use it somewhere else in the code like this:  
  int function1 () {returns (if some_condition) 0 ; ... return 1; } Void function2 () {if (CHECK_FUNC_RESULT (function1)} {... to do something}}   
 What I really == on function2 (some_condition without any undefined behavior) Can I expect to return from?   
 
 
 This should work, but if your () action If the function1 1 returns is your example: never) it looks like a dangerous construction, because nobody else will ever be executed.

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