On Mon, 24 Feb 2003 17:39:34 -0500, Jakub Jelinek <jakub@redhat.com>
wrote:
>On Mon, Feb 24, 2003 at 10:35:24PM +0100, Andreas Schwab wrote:
>> Linus Torvalds <torvalds@transmeta.com> writes:
>>
>> |> Does gcc still warn about things like
>> |>
>> |> #define COUNT (sizeof(array)/sizeof(element))
>> |>
>> |> int i;
>> |> for (i = 0; i < COUNT; i++)
>> |> ...
>> |>
>> |> where COUNT is obviously unsigned (because sizeof is size_t and thus
>> |> unsigned)?
>> |>
>> |> Gcc used to complain about things like that, which is a FUCKING DISASTER.
>>
>> How can you distinguish that from other occurrences of (int)<(size_t)?
>
>Value range propagation pass, then warn?
I know it is stupid/unnecessary etc, but you could do
#if COUNT > INT_MAX
#error you idiot...
#endif
int i;
for(i =0; i < (int)COUNT; i++)
...
where the #if was placed in whatever header COUNT was defined.
and have safe code with no runtime overhead and looking only mildly
idiotic.
john alvord
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