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47 lines
1.5 KiB
C++
47 lines
1.5 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<wchar_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 wchar_t *p = L"123";
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return std::char_traits<wchar_t>::find(p, 3, L'1') == p
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&& std::char_traits<wchar_t>::find(p, 3, L'2') == p + 1
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&& std::char_traits<wchar_t>::find(p, 3, L'3') == p + 2
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&& std::char_traits<wchar_t>::find(p, 3, L'4') == nullptr;
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}
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#endif
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int main()
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{
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wchar_t s1[] = {1, 2, 3};
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assert(std::char_traits<wchar_t>::find(s1, 3, wchar_t(1)) == s1);
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assert(std::char_traits<wchar_t>::find(s1, 3, wchar_t(2)) == s1+1);
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assert(std::char_traits<wchar_t>::find(s1, 3, wchar_t(3)) == s1+2);
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assert(std::char_traits<wchar_t>::find(s1, 3, wchar_t(4)) == 0);
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assert(std::char_traits<wchar_t>::find(s1, 3, wchar_t(0)) == 0);
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assert(std::char_traits<wchar_t>::find(NULL, 0, wchar_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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}
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