Formatting element of std::vector<bool> fails

[felix642]

Hi, the following code does not compile :

#include <vector>
#include <fmt/core.h>

int main()
{
    std::vector<bool> myVector = {false};
    
    fmt::print("{}", myVector[0]);
}

This is because std::vector bool as a specialisation where the elements are made space efficient.

Is there something already in place that allows me to format the value or do I need to cast the element when calling fmt::print()?

https://godbolt.org/z/91P18xKxK

[vitaut]

I think this can be solved by adding a format_as overload that converts vector<bool> element type to bool. A PR is welcome.