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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
//
//===----------------------------------------------------------------------===//
#include <cstddef>
#include <test_macros.h>
// UNSUPPORTED: c++03, c++11, c++14
// template <class IntegerType>
// constexpr byte& operator<<=(byte& b, IntegerType shift) noexcept;
// This function shall not participate in overload resolution unless
// is_integral_v<IntegerType> is true.
constexpr std::byte test(std::byte b) {
return b <<= 2;
}
int main(int, char**) {
std::byte b; // not constexpr, just used in noexcept check
constexpr std::byte b2{static_cast<std::byte>(2)};
constexpr std::byte b3{static_cast<std::byte>(3)};
static_assert(noexcept(b <<= 2), "" );
static_assert(std::to_integer<int>(test(b2)) == 8, "" );
static_assert(std::to_integer<int>(test(b3)) == 12, "" );
return 0;
}