support std::optional holding cv-qualified types (#4562)

Fixes #4561
2025-10-03 14:40:44 +03:00
parent 27ea09836a
commit 486e7ba579
2 changed files with 2 additions and 1 deletions
--- a/include/fmt/std.h
+++ b/include/fmt/std.h
@@ -353,7 +353,7 @@ template <typename T, typename Char>
 struct formatter<std::optional<T>, Char,
                 std::enable_if_t<is_formattable<T, Char>::value>> {
 private:
-  formatter<T, Char> underlying_;
+  formatter<std::remove_cv_t<T>, Char> underlying_;
  static constexpr basic_string_view<Char> optional =
      detail::string_literal<Char, 'o', 'p', 't', 'i', 'o', 'n', 'a', 'l',
                             '('>{};