| //===----------------------------------------------------------------------===// |
| // |
| // 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. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <string> |
| |
| // template<> struct char_traits<char32_t> |
| |
| // static const char_type* find(const char_type* s, size_t n, const char_type& a); |
| // constexpr in C++17 |
| |
| #include <string> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| |
| #if TEST_STD_VER > 14 |
| constexpr bool test_constexpr() |
| { |
| constexpr const char32_t *p = U"123"; |
| return std::char_traits<char32_t>::find(p, 3, U'1') == p |
| && std::char_traits<char32_t>::find(p, 3, U'2') == p + 1 |
| && std::char_traits<char32_t>::find(p, 3, U'3') == p + 2 |
| && std::char_traits<char32_t>::find(p, 3, U'4') == nullptr; |
| } |
| #endif |
| |
| int main() |
| { |
| #ifndef _LIBCPP_HAS_NO_UNICODE_CHARS |
| char32_t s1[] = {1, 2, 3}; |
| assert(std::char_traits<char32_t>::find(s1, 3, char32_t(1)) == s1); |
| assert(std::char_traits<char32_t>::find(s1, 3, char32_t(2)) == s1+1); |
| assert(std::char_traits<char32_t>::find(s1, 3, char32_t(3)) == s1+2); |
| assert(std::char_traits<char32_t>::find(s1, 3, char32_t(4)) == 0); |
| assert(std::char_traits<char32_t>::find(s1, 3, char32_t(0)) == 0); |
| assert(std::char_traits<char32_t>::find(NULL, 0, char32_t(0)) == 0); |
| |
| #if TEST_STD_VER > 14 |
| static_assert(test_constexpr(), "" ); |
| #endif |
| #endif // _LIBCPP_HAS_NO_UNICODE_CHARS |
| } |