Re: typedefs and structs

[Andreas Schwab]

Vadim Lobanov <vlobanov@xxxxxxxxxxxxx> writes:

> However, if the code is as follows:
> 	void foo (void) {
> 		int myvar = 0;
> 		printf("%d\n", myvar);
> 		bar(&myvar);
> 		printf("%d\n", myvar);
> 	}
> If bar is declared in _another_ file as
> 	void bar (const int * var);
> then I think the compiler can validly cache the value of 'myvar' for the
> second printf without re-reading it. Correct/incorrect?

Incorrect. bar() may cast away const.  In C const does not mean readonly.

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@xxxxxxx
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