| //===----------------------------------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is dual licensed under the MIT and the University of Illinois Open |
| // Source Licenses. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include <cstddef> |
| #include <test_macros.h> |
| |
| // UNSUPPORTED: c++98, 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 () { |
| 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, "" ); |
| |
| } |
