Is there a warning for string literal to bool conversion in gcc

Question

In a quite large code base, I found the following construct (rewritten snippet) in a cpp file

int main()
{
    bool b;
    //... some code ...;
    b = "False"
}

This is completely legal code, but clearly not intentional. It is easily fixed, but it has been present since 2014 without anyone noticing, so it is obviously not easy to spot.

Is it possible to make gcc warn about this?

Answer 1

Neither g++ 7 nor clang++ 5 warn with -Wall -Wextra -Wpedantic.

Clang has a warning called -Wstring-conversion that will catch the mistake, but gcc doesn't have it. I briefly looked through the gcc warning documentation page and didn't find anything that would catch the mistake.

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I've filed a report for a feature suggestion on the gcc bug tracker: #80151.