//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
// UNSUPPORTED: GCC-ALWAYS_INLINE-FIXME
// <format>
// template<class T, class charT = char>
// requires same_as<remove_cvref_t<T>, T> && formattable<T, charT>
// class range_formatter
// constexpr formatter<T, charT>& underlying() noexcept;
// constexpr const formatter<T, charT>& underlying() const noexcept;
#include <concepts>
#include <format>
#include "test_macros.h"
template <class CharT>
constexpr void test_underlying() {
{
std::range_formatter<int, CharT> formatter;
[[maybe_unused]] std::same_as<std::formatter<int, CharT>&> decltype(auto) underlying = formatter.underlying();
static_assert(noexcept(formatter.underlying()));
}
{
const std::range_formatter<int, CharT> formatter;
[[maybe_unused]] std::same_as<const std::formatter<int, CharT>&> decltype(auto) underlying = formatter.underlying();
static_assert(noexcept(formatter.underlying()));
}
}
constexpr bool test() {
test_underlying<char>();
#ifndef TEST_HAS_NO_WIDE_CHARACTERS
test_underlying<wchar_t>();
#endif
return true;
}
int main(int, char**) {
test();
static_assert(test());
return 0;
}