44 lines · cpp
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8// UNSUPPORTED: c++03, c++11, c++14, c++179 10// <string>11 12// template<> struct char_traits<char8_t>13 14// static constexpr const char_type* find(const char_type* s, size_t n, const char_type& a);15 16#include <string>17#include <cassert>18 19#include "test_macros.h"20 21#ifndef TEST_HAS_NO_CHAR8_T22constexpr bool test_constexpr() {23 constexpr const char8_t* p = u8"123";24 return std::char_traits<char8_t>::find(p, 3, u8'1') == p && std::char_traits<char8_t>::find(p, 3, u8'2') == p + 1 &&25 std::char_traits<char8_t>::find(p, 3, u8'3') == p + 2 &&26 std::char_traits<char8_t>::find(p, 3, u8'4') == nullptr;27}28 29int main(int, char**) {30 char8_t s1[] = {1, 2, 3};31 assert(std::char_traits<char8_t>::find(s1, 3, char8_t(1)) == s1);32 assert(std::char_traits<char8_t>::find(s1, 3, char8_t(2)) == s1 + 1);33 assert(std::char_traits<char8_t>::find(s1, 3, char8_t(3)) == s1 + 2);34 assert(std::char_traits<char8_t>::find(s1, 3, char8_t(4)) == 0);35 assert(std::char_traits<char8_t>::find(s1, 3, char8_t(0)) == 0);36 assert(std::char_traits<char8_t>::find(NULL, 0, char8_t(0)) == 0);37 38 static_assert(test_constexpr(), "");39 return 0;40}41#else42int main(int, char**) { return 0; }43#endif44