c - Macro scope guards -


possible duplicates:
why there meaningless do/while , if/else statements in c/c++ macros?
what's use of while(0) when define macro?

is there difference between 

#define macro(x)  \     {             \     ...           \     }

and

#define macro(x)   \     {           \     ...            \     } while(0)

?

do { ... } while(0) allows macro used in conditional code.

looks question has been asked before: c multi-line macro: do/while(0) vs scope block

here's link couple of reasons so, , why omit semicolon @ end.


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