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50 lines
1.6 KiB
C++
50 lines
1.6 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// <string>
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// template<> struct char_traits<char16_t>
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// static const char_type* find(const char_type* s, size_t n, const char_type& a);
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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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constexpr const char16_t *p = u"123";
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return std::char_traits<char16_t>::find(p, 3, u'1') == p
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&& std::char_traits<char16_t>::find(p, 3, u'2') == p + 1
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&& std::char_traits<char16_t>::find(p, 3, u'3') == p + 2
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&& std::char_traits<char16_t>::find(p, 3, u'4') == nullptr;
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}
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#endif
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int main(int, char**)
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{
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#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
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char16_t s1[] = {1, 2, 3};
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assert(std::char_traits<char16_t>::find(s1, 3, char16_t(1)) == s1);
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assert(std::char_traits<char16_t>::find(s1, 3, char16_t(2)) == s1+1);
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assert(std::char_traits<char16_t>::find(s1, 3, char16_t(3)) == s1+2);
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assert(std::char_traits<char16_t>::find(s1, 3, char16_t(4)) == 0);
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assert(std::char_traits<char16_t>::find(s1, 3, char16_t(0)) == 0);
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assert(std::char_traits<char16_t>::find(NULL, 0, char16_t(0)) == 0);
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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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return 0;
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}
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