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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: clang-8
// <string>
// template<> struct char_traits<char8_t>
// static char_type* move(char_type* s1, const char_type* s2, size_t n);
#include <string>
#include <cassert>
#include "test_macros.h"
TEST_CONSTEXPR_CXX20 bool test()
{
#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
char8_t s1[] = {1, 2, 3};
assert(std::char_traits<char8_t>::move(s1, s1+1, 2) == s1);
assert(s1[0] == char8_t(2));
assert(s1[1] == char8_t(3));
assert(s1[2] == char8_t(3));
s1[2] = char8_t(0);
assert(std::char_traits<char8_t>::move(s1+1, s1, 2) == s1+1);
assert(s1[0] == char8_t(2));
assert(s1[1] == char8_t(2));
assert(s1[2] == char8_t(3));
assert(std::char_traits<char8_t>::move(NULL, s1, 0) == NULL);
assert(std::char_traits<char8_t>::move(s1, NULL, 0) == s1);
#endif
return true;
}
int main(int, char**)
{
test();
#if TEST_STD_VER > 17
static_assert(test());
#endif
return 0;
}
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