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// { dg-options "-std=gnu++20" }
// { dg-do compile { target c++20 } }
// LWG 3810. CTAD for std::basic_format_args
#include <format>
auto args_store = std::make_format_args(1,2,3);
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>(1, 2, 3))); // should work
}
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