Avoiding unused variables warnings when using assert() in a Release build

Question

Sometimes a local variable is used for the sole purpose of checking it in an assert(), like so -

int Result = Func();
assert( Result == 1 );

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Answer 1

I wouldn't be able to give a better answer than this, that addresses that problem, and many more:

Stupid C++ Tricks: Adventures in assert

#ifdef NDEBUG
#define ASSERT(x) do { (void)sizeof(x);} while (0)
#else
#include 
#define ASSERT(x) assert(x)
#endif