Check if formatter is not defined if there is format_as

2022-03-26 09:36:06 -07:00 · 2022-03-26 09:36:06 -07:00 · e2408f37c8
commit e2408f37c8
parent db5b8993ac
1 changed files with 1 additions and 0 deletions
--- a/include/fmt/core.h
+++ b/include/fmt/core.h
@ -1440,6 +1440,7 @@ template <typename Context> struct arg_mapper {
            FMT_ENABLE_IF(std::is_enum<T>::value&& std::is_integral<U>::value)>
  FMT_CONSTEXPR FMT_INLINE auto map(const T& val)
      -> decltype(std::declval<arg_mapper>().map(U())) {
+    static_assert(!has_formatter<T, Context>::value, "");
    return map(format_as(val));
  }