Enum class not supported?

[LouisDuVerdier]

Hello,

There might be an issue here, I'm using Git hash d66fa22 (quite recent but I could upgrade) and the support for enum class looks broken:

enum class TestEnumClass
{
    A,
    B,
    C
};

void doSomething()
{
    fmt::print("{}\n", TestEnumClass::A);
}

That prints the following error:

fmt/include/fmt/core.h:329:3: error: static assertion failed: don't know how to format the type, include fmt/ostream.h if it provides an operator<< that should be used
   static_assert(internal::no_formatter_error<T>::value,
   ^~~~~~~~~~~~~

Classical enums work fine. It might be related to the management of convert_to_int in which std::is_convertible<T, int>::value returns false. I tried to include ostream.h, to make a custom formatter, etc., without success.

Does it ring any bell to you? Sorry if I'm missing something simple here, I'm a new user of fmt.

Thanks,
Best regards,
Louis

[vitaut]

Duplicate of #391.

[LouisDuVerdier]

Thank you for pointing this one, I could make it work generically using your example there (since it looks disabled by default - but I don't really want to declare all the enum class that I need to format since there are a lot):

#include <fmt/ostream.h>

template<typename T>
typename std::enable_if<std::is_enum<T>::value, std::ostream>::type &
operator<<(std::ostream& os, T const& ec) {
    return os << static_cast<int>(ec);
}