Re: [PATCH 1/4] compiler.h: introduce unused_expression() macro

[Cong Wang]

On 04/25/2012 07:26 PM, Konstantin Khlebnikov wrote:
> Sometimes we want to check some expressions correctness in compile-time without
> generating extra code. "(void)(e)" does not work if expression has side-effects.
> This patch introduces macro unused_expression() which helps in this situation.

Interesting, I am wondering why gcc doesn't eliminate the code as we 
pass either -O2 or -Os to it.
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