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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
// UNSUPPORTED: libcpp-no-concepts
// <utility>
// template<class R, class T>
// constexpr bool in_range(T t) noexcept; // C++20
#include <utility>
#include <limits>
#include <numeric>
#include <tuple>
#include <cassert>
#include "test_macros.h"
template <typename T>
struct Tuple {
T min;
T max;
T mid;
constexpr Tuple() {
min = std::numeric_limits<T>::min();
max = std::numeric_limits<T>::max();
mid = std::midpoint(min, max);
}
};
template <typename T>
constexpr void test_in_range1() {
constexpr Tuple<T> tup;
assert(std::in_range<T>(tup.min));
assert(std::in_range<T>(tup.min + 1));
assert(std::in_range<T>(tup.max));
assert(std::in_range<T>(tup.max - 1));
assert(std::in_range<T>(tup.mid));
assert(std::in_range<T>(tup.mid - 1));
assert(std::in_range<T>(tup.mid + 1));
}
constexpr void test_in_range() {
constexpr Tuple<uint8_t> utup8;
constexpr Tuple<int8_t> stup8;
assert(!std::in_range<int8_t>(utup8.max));
assert(std::in_range<short>(utup8.max));
assert(!std::in_range<uint8_t>(stup8.min));
assert(std::in_range<int8_t>(utup8.mid));
assert(!std::in_range<uint8_t>(stup8.mid));
assert(!std::in_range<uint8_t>(-1));
}
template <class... Ts>
constexpr void test1(const std::tuple<Ts...>&) {
(test_in_range1<Ts>() , ...);
}
constexpr bool test() {
std::tuple<
#ifndef _LIBCPP_HAS_NO_INT128
__int128_t, __uint128_t,
#endif
unsigned long long, long long, unsigned long, long, unsigned int, int,
unsigned short, short, unsigned char, signed char> types;
test1(types);
test_in_range();
return true;
}
int main() {
ASSERT_NOEXCEPT(std::in_range<int>(-1));
test();
static_assert(test());
return 0;
}
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