Ambiguous functions with ostream.h and const char * conversion

[EmilyMansfield]

I'm working with some legacy code that defines a type with an implicit conversion to const char *, but I also have types with an operator<<. Including both ostream.h and format.h causes a compile error on GCC and Clang due to an ambiguous call to map, for example

#include <fmt/format.h>
#include <fmt/ostream.h>

struct MyBadType {
    operator const char *() const { return "whoops"; }
};

int main() {
    std::string s = fmt::format("{}", MyBadType{});
}

Godbolt: https://godbolt.org/z/XkXue4

fails to compile.

[vitaut]

Fixed in f299010. Thanks for reporting!