| // { dg-do compile { target c++20 } } |
| |
| // LWG 3810. CTAD for std::basic_format_args |
| |
| #include <format> |
| |
| int x = 1; |
| long y = 2; |
| short z = 3; |
| |
| auto args_store = std::make_format_args(x, y, z); |
| std::basic_format_args args = args_store; |
| static_assert(std::is_same_v<decltype(args), std::format_args>); |
| |
| |
| template<typename Context> |
| void foo(std::basic_format_args<Context>); |
| |
| void |
| test_ctad() |
| { |
| using std::basic_format_args; |
| using std::make_format_args; |
| using SomeContext = std::wformat_context; |
| |
| // foo(make_format_args<SomeContext>(...)); // won't work |
| foo(basic_format_args(make_format_args<SomeContext>(x, y, z))); // should work |
| } |
