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//===----------------------------------------------------------------------===//
// 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
// <format>
// template<class T, class charT>
// concept formattable = ...
#include <concepts>
#include <format>
#include "test_macros.h"
template <class T, class CharT>
void assert_is_not_formattable() {
static_assert(!std::formattable<T, CharT>);
}
template <class T, class CharT>
void assert_is_formattable() {
// Only formatters for CharT == char || CharT == wchar_t are enabled for the
// standard formatters. When CharT is a different type the formatter should
// be disabled.
if constexpr (std::same_as<CharT, char>
#ifndef TEST_HAS_NO_WIDE_CHARACTERS
|| std::same_as<CharT, wchar_t>
#endif
)
static_assert(std::formattable<T, CharT>);
else
assert_is_not_formattable<T, CharT>();
}
template <class CharT>
void test() {
assert_is_formattable<float, CharT>();
assert_is_formattable<double, CharT>();
assert_is_formattable<long double, CharT>();
}
void test() {
test<char>();
#ifndef TEST_HAS_NO_WIDE_CHARACTERS
test<wchar_t>();
#endif
test<char8_t>();
test<char16_t>();
test<char32_t>();
test<int>();
}
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