62 lines
2.2 KiB
C++
62 lines
2.2 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <string>
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// template<> struct char_traits<char32_t>
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// static int compare(const char_type* s1, const char_type* s2, size_t n);
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// constexpr in C++17
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#include <string>
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#include <cassert>
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#include "test_macros.h"
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#if TEST_STD_VER > 14
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constexpr bool test_constexpr()
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{
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return std::char_traits<char32_t>::compare(U"123", U"223", 3) < 0
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&& std::char_traits<char32_t>::compare(U"223", U"123", 3) > 0
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&& std::char_traits<char32_t>::compare(U"123", U"123", 3) == 0;
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}
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#endif
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int main()
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{
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#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
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#if TEST_STD_VER >= 11
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assert(std::char_traits<char32_t>::compare(U"", U"", 0) == 0);
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assert(std::char_traits<char32_t>::compare(NULL, NULL, 0) == 0);
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assert(std::char_traits<char32_t>::compare(U"1", U"1", 1) == 0);
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assert(std::char_traits<char32_t>::compare(U"1", U"2", 1) < 0);
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assert(std::char_traits<char32_t>::compare(U"2", U"1", 1) > 0);
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assert(std::char_traits<char32_t>::compare(U"12", U"12", 2) == 0);
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assert(std::char_traits<char32_t>::compare(U"12", U"13", 2) < 0);
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assert(std::char_traits<char32_t>::compare(U"12", U"22", 2) < 0);
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assert(std::char_traits<char32_t>::compare(U"13", U"12", 2) > 0);
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assert(std::char_traits<char32_t>::compare(U"22", U"12", 2) > 0);
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assert(std::char_traits<char32_t>::compare(U"123", U"123", 3) == 0);
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assert(std::char_traits<char32_t>::compare(U"123", U"223", 3) < 0);
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assert(std::char_traits<char32_t>::compare(U"123", U"133", 3) < 0);
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assert(std::char_traits<char32_t>::compare(U"123", U"124", 3) < 0);
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assert(std::char_traits<char32_t>::compare(U"223", U"123", 3) > 0);
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assert(std::char_traits<char32_t>::compare(U"133", U"123", 3) > 0);
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assert(std::char_traits<char32_t>::compare(U"124", U"123", 3) > 0);
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#endif
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#if TEST_STD_VER > 14
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static_assert(test_constexpr(), "" );
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#endif
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#endif // _LIBCPP_HAS_NO_UNICODE_CHARS
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}
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