https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119222
Gwen Fu <gwen3293940943 at gmail dot com> changed:
What |Removed |Added
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CC| |gwen3293940943 at gmail dot com
--- Comment #2 from Gwen Fu <gwen3293940943 at gmail dot com> ---
(In reply to Antony Polukhin from comment #0)
> Consider the following example:
>
> int foo() {
> return 1 / static_cast<double>(0);
> }
>
>
> With -Wall -Wextra there is no warning about an undefined behavior
> ([conv.fpint] p1 "The behavior is undefined if the truncated value cannot be
> represented in the destination type.")
>
> Please add a warning
>
> Godbolt playground: https://godbolt.org/z/cMYo6xPaY
I tried this example :
int foo() {
return 1 / 0;
}
int main()
{
return 0;
}
There is a warning :
119222.cc: In function ‘int foo()’:
119222.cc:2:14: warning： 被零除(divide by zero)[-Wdiv-by-zero]
2 | return 1 / 0;
| ~~^~~
