Make ostream operators opt in to reduce the risk of ODR violations

2022-02-04 15:06:45 -08:00
parent 8a21e328b8
commit f055ebbd25
5 changed files with 35 additions and 43 deletions
@@ -220,6 +220,12 @@ std::wostream& operator<<(std::wostream& os, streamable_enum) {
  return os << L"streamable_enum";
 }

+namespace fmt {
+template <>
+struct formatter<streamable_enum, wchar_t>
+    : ostream_formatter<streamable_enum, wchar_t> {};
+}  // namespace fmt
+
 enum unstreamable_enum {};

 TEST(xchar_test, enum) {