//===----------------------------------------------------------------------===//
//
//                     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
// The following compilers don't like "std::byte b1{1}"
// UNSUPPORTED: clang-3.5, clang-3.6, clang-3.7, clang-3.8
// UNSUPPORTED: apple-clang-6, apple-clang-7, apple-clang-8.0

// 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 <<= 2.0;
    }


int main () {
    constexpr std::byte b1 = test(std::byte{1});
}