@@ -1815,9 +1815,11 @@ namespace __format
return _M_f.format(__u, __fc);
}
+#if __cpp_lib_format_ranges
constexpr void
set_debug_format() noexcept
{ _M_f._M_spec._M_type = __format::_Pres_esc; }
+#endif
private:
__format::__formatter_int<wchar_t> _M_f;
@@ -1843,7 +1845,9 @@ namespace __format
format(_CharT* __u, basic_format_context<_Out, _CharT>& __fc) const
{ return _M_f.format(__u, __fc); }
+#if __cpp_lib_format_ranges
constexpr void set_debug_format() noexcept { _M_f.set_debug_format(); }
+#endif
private:
__format::__formatter_str<_CharT> _M_f;
@@ -1866,7 +1870,9 @@ namespace __format
basic_format_context<_Out, _CharT>& __fc) const
{ return _M_f.format(__u, __fc); }
+#if __cpp_lib_format_ranges
constexpr void set_debug_format() noexcept { _M_f.set_debug_format(); }
+#endif
private:
__format::__formatter_str<_CharT> _M_f;
@@ -1888,7 +1894,9 @@ namespace __format
basic_format_context<_Out, _CharT>& __fc) const
{ return _M_f.format({__u, _Nm}, __fc); }
+#if __cpp_lib_format_ranges
constexpr void set_debug_format() noexcept { _M_f.set_debug_format(); }
+#endif
private:
__format::__formatter_str<_CharT> _M_f;
new file mode 100644
@@ -0,0 +1,29 @@
+// { dg-do compile { target c++20 } }
+
+#include <format>
+
+template<typename T,
+ typename C = std::remove_cvref_t<decltype(std::declval<T&>()[0])>>
+constexpr bool
+test_pr112832()
+{
+ std::formatter<T, C> f;
+ if constexpr (requires{ f.set_debug_format(); })
+ f.set_debug_format();
+ return true;
+}
+
+int main()
+{
+ static_assert(test_pr112832<std::string_view>());
+ static_assert(test_pr112832<char*>());
+ static_assert(test_pr112832<const char*>());
+ static_assert(test_pr112832<char[1]>());
+#ifdef _GLIBCXX_USE_WCHAR_T
+ static_assert(test_pr112832<std::wstring_view>());
+ static_assert(test_pr112832<wchar_t*>());
+ static_assert(test_pr112832<const wchar_t*>());
+ static_assert(test_pr112832<wchar_t[1]>());
+ static_assert(test_pr112832<char, wchar_t>());
+#endif
+}