Author
anonymous
9 months ago
Language
C++
Compiler
gcc HEAD 15.0.0 20240711 (experimental)
Options
Warnings
Don't Use Boost
C++2a
-pedantic
Author
anonymous
9 months ago
$ g++ prog.cc -Wall -Wextra -std=c++2a -pedantic prog.cc: In instantiation of 'struct std::formatter<demo::outer_t::threshold_t<int>, char>':
/opt/wandbox/gcc-head/include/c++/15.0.0/type_traits:3487:54: required from 'constexpr const bool std::is_default_constructible_v<std::formatter<demo::outer_t::threshold_t<int>, char> >'
3487 | inline constexpr bool is_default_constructible_v = __is_constructible(_Tp);
| ^~~~~~~~~~~~~~~~~~~~~~~
/opt/wandbox/gcc-head/include/c++/15.0.0/format:4067:3: required from 'class std::__format::_Checking_scanner<char, demo::outer_t::threshold_t<int>, demo::outer_t::threshold_t<long unsigned int> >'
4067 | (is_default_constructible_v<formatter<_Args, _CharT>> && ...),
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/wandbox/gcc-head/include/c++/15.0.0/format:4212:4: required from 'consteval std::basic_format_string<_CharT, _Args>::basic_format_string(const _Tp&) [with _Tp = char [22]; _CharT = char; _Args = {const demo::outer_t::threshold_t<int>&, const demo::outer_t::threshold_t<long unsigned int>&}]'
4212 | __scanner(_M_str);
| ^~~~~~~~~
prog.cc:49:30: required from here
49 | return std::format_to(ctx.out(), "(first:{}, second:{})", what.m_first, what.m_second);
| ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
prog.cc:41:38: error: 'template<class T> class demo::outer_t::threshold_t' is private within this context
41 | auto format(const demo::outer_t::threshold_t<T>& what, std::format_context& ctx) const {
| ^~~~~~~~~~~~~~
prog.cc:11:11: note: declared private here
11 | class threshold_t
| ^~~~~~~~~~~
prog.cc: In instantiation of 'struct std::formatter<demo::outer_t::threshold_t<long unsigned int>, char>':
/opt/wandbox/gcc-head/include/c++/15.0.0/type_traits:3487:54: required from 'constexpr const bool std::is_default_constructible_v<std::formatter<demo::outer_t::threshold_t<long unsigned int>, char> >'
3487 | inline constexpr bool is_default_constructible_v = __is_constructible(_Tp);
| ^~~~~~~~~~~~~~~~~~~~~~~
/opt/wandbox/gcc-head/include/c++/15.0.0/format:4067:3: required from 'class std::__format::_Checking_scanner<char, demo::outer_t::threshold_t<int>, demo::outer_t::threshold_t<long unsigned int> >'
4067 | (is_default_constructible_v<formatter<_Args, _CharT>> && ...),
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/wandbox/gcc-head/include/c++/15.0.0/format:4212:4: required from 'consteval std::basic_format_string<_CharT, _Args>::basic_format_string(const _Tp&) [with _Tp = char [22]; _CharT = char; _Args = {const demo::outer_t::threshold_t<int>&, const demo::outer_t::threshold_t<long unsigned int>&}]'
4212 | __scanner(_M_str);
| ^~~~~~~~~
prog.cc:49:30: required from here
49 | return std::format_to(ctx.out(), "(first:{}, second:{})", what.m_first, what.m_second);
| ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
prog.cc:41:38: error: 'template<class T> class demo::outer_t::threshold_t' is private within this context
41 | auto format(const demo::outer_t::threshold_t<T>& what, std::format_context& ctx) const {
| ^~~~~~~~~~~~~~
prog.cc:11:11: note: declared private here
11 | class threshold_t
| ^~~~~~~~~~~
Exit Code:
1