[cairo] compiler warnings in cairo_wideint.h/c
toa at pop.agri.ch
Wed Oct 13 13:38:04 PDT 2004
Keith Packard wrote:
> Around 8 o'clock on Oct 13, "Andreas Tobler" wrote:
>>/* Type qualifiers on a function return type are
>> normally permitted by the standard but have no
> Hmm. The effect I was trying to induce was to teach the compiler that
> given fixed arguments, these functions always return the same result
> (i.e., they are "pure" functions). I thought that's what the 'const'
> qualifier on the return value did.
Not quite, the const has only a meaning in terms of compile time issue.
e.g, you can say 'const int a = 10;' Then the compiler assigns 'a' a ten
At runtime the const has no influence. Only if someone outside your
program/application is modifying the 'a'. (e.g) a hw issue.
Your program/application can not modify const's.
And a function is meant to be modifying at runtime.
This is my understanding of using const.
If I'm wrong, please tell me.
Maybe, you may get something out of using 'static'.
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