[Bug c/66658] missing -Wunused-value negating a function result in a comma expression

[ethouris at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66658

Michal Malecki <ethouris at gmail dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |ethouris at gmail dot com

--- Comment #3 from Michal Malecki <ethouris at gmail dot com> ---
Just caught this one, too, something like:

if (x(a, b), c)
{ ... }

Where x is declared as

int x(int a, int b, int c = -1);

There should be at least a warning that "suggested parentheses around the
expression", not necessarily with every case where the "comma operator" is
used.