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//===----------------------------------------------------------------------===//
//
// 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.
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
// <string>
// template<> struct char_traits<char8_t>
// static constexpr int compare(const char_type* s1, const char_type* s2, size_t n);
#include <string>
#include <cassert>
#include "test_macros.h"
#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
constexpr bool test_constexpr()
{
return std::char_traits<char8_t>::compare(u8"123", u8"223", 3) < 0
&& std::char_traits<char8_t>::compare(u8"223", u8"123", 3) > 0
&& std::char_traits<char8_t>::compare(u8"123", u8"123", 3) == 0;
}
int main()
{
assert(std::char_traits<char8_t>::compare(u8"", u8"", 0) == 0);
assert(std::char_traits<char8_t>::compare(NULL, NULL, 0) == 0);
assert(std::char_traits<char8_t>::compare(u8"1", u8"1", 1) == 0);
assert(std::char_traits<char8_t>::compare(u8"1", u8"2", 1) < 0);
assert(std::char_traits<char8_t>::compare(u8"2", u8"1", 1) > 0);
assert(std::char_traits<char8_t>::compare(u8"12", u8"12", 2) == 0);
assert(std::char_traits<char8_t>::compare(u8"12", u8"13", 2) < 0);
assert(std::char_traits<char8_t>::compare(u8"12", u8"22", 2) < 0);
assert(std::char_traits<char8_t>::compare(u8"13", u8"12", 2) > 0);
assert(std::char_traits<char8_t>::compare(u8"22", u8"12", 2) > 0);
assert(std::char_traits<char8_t>::compare(u8"123", u8"123", 3) == 0);
assert(std::char_traits<char8_t>::compare(u8"123", u8"223", 3) < 0);
assert(std::char_traits<char8_t>::compare(u8"123", u8"133", 3) < 0);
assert(std::char_traits<char8_t>::compare(u8"123", u8"124", 3) < 0);
assert(std::char_traits<char8_t>::compare(u8"223", u8"123", 3) > 0);
assert(std::char_traits<char8_t>::compare(u8"133", u8"123", 3) > 0);
assert(std::char_traits<char8_t>::compare(u8"124", u8"123", 3) > 0);
static_assert(test_constexpr(), "" );
}
#else
int main () {}
#endif
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