1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // <string> 11 12 // template<> struct char_traits<char32_t> 13 14 // static int compare(const char_type* s1, const char_type* s2, size_t n); 15 // constexpr in C++17 16 17 #include <string> 18 #include <cassert> 19 20 #include "test_macros.h" 21 22 #if TEST_STD_VER > 14 23 constexpr bool test_constexpr() 24 { 25 return std::char_traits<char32_t>::compare(U"123", U"223", 3) < 0 26 && std::char_traits<char32_t>::compare(U"223", U"123", 3) > 0 27 && std::char_traits<char32_t>::compare(U"123", U"123", 3) == 0; 28 } 29 #endif 30 31 int main() 32 { 33 #ifndef _LIBCPP_HAS_NO_UNICODE_CHARS 34 #if TEST_STD_VER >= 11 35 assert(std::char_traits<char32_t>::compare(U"", U"", 0) == 0); 36 assert(std::char_traits<char32_t>::compare(NULL, NULL, 0) == 0); 37 38 assert(std::char_traits<char32_t>::compare(U"1", U"1", 1) == 0); 39 assert(std::char_traits<char32_t>::compare(U"1", U"2", 1) < 0); 40 assert(std::char_traits<char32_t>::compare(U"2", U"1", 1) > 0); 41 42 assert(std::char_traits<char32_t>::compare(U"12", U"12", 2) == 0); 43 assert(std::char_traits<char32_t>::compare(U"12", U"13", 2) < 0); 44 assert(std::char_traits<char32_t>::compare(U"12", U"22", 2) < 0); 45 assert(std::char_traits<char32_t>::compare(U"13", U"12", 2) > 0); 46 assert(std::char_traits<char32_t>::compare(U"22", U"12", 2) > 0); 47 48 assert(std::char_traits<char32_t>::compare(U"123", U"123", 3) == 0); 49 assert(std::char_traits<char32_t>::compare(U"123", U"223", 3) < 0); 50 assert(std::char_traits<char32_t>::compare(U"123", U"133", 3) < 0); 51 assert(std::char_traits<char32_t>::compare(U"123", U"124", 3) < 0); 52 assert(std::char_traits<char32_t>::compare(U"223", U"123", 3) > 0); 53 assert(std::char_traits<char32_t>::compare(U"133", U"123", 3) > 0); 54 assert(std::char_traits<char32_t>::compare(U"124", U"123", 3) > 0); 55 #endif 56 57 #if TEST_STD_VER > 14 58 static_assert(test_constexpr(), "" ); 59 #endif 60 #endif // _LIBCPP_HAS_NO_UNICODE_CHARS 61 } 62
