Agnius Vasiliauskas Agnius Vasiliauskas - 4 months ago 8
C Question

Use of null statement in C

What are typical uses of null statement

;

in C ?


(I know that it is basically used to skip expression where it is expected by the compiler, but here I'm interested only in real-world examples of such use cases...)

Thanks

Answer

It's typically the side-effect of a code block that was stripped by the preprocessor, like

#if DEBUG
    #define ASSERT(_x) Assert(_x)
#else
    #define ASSERT(_x)
#endif


ASSERT(test);    // Results in null statement in non-debug builds

That, or in loops where your condition already contains whatever needs to be done in each iteration.

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