79 lines
1.6 KiB
C++
79 lines
1.6 KiB
C++
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//===----------------------------------------------------------------------===//
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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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// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
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// <string_view>
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// void swap(basic_string_view& _other) noexcept
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#include <string_view>
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#include <cassert>
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#include "test_macros.h"
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template <typename CharT>
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void test(const CharT* s, std::size_t len) {
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typedef std::basic_string_view<CharT> SV;
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{
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SV sv1(s);
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SV sv2;
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assert(sv1.size() == len);
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assert(sv1.data() == s);
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assert(sv2.size() == 0);
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sv1.swap(sv2);
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assert(sv1.size() == 0);
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assert(sv2.size() == len);
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assert(sv2.data() == s);
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}
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}
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#if TEST_STD_VER > 11
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constexpr std::size_t test_ce(size_t n, size_t k) {
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typedef std::basic_string_view<char> SV;
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SV sv1{"ABCDEFGHIJKL", n};
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SV sv2{sv1.data(), k};
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sv1.swap(sv2);
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return sv1.size();
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}
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#endif
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int main(int, char**) {
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test("ABCDE", 5);
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test("a", 1);
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test("", 0);
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#ifndef TEST_HAS_NO_WIDE_CHARACTERS
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test(L"ABCDE", 5);
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test(L"a", 1);
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test(L"", 0);
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#endif
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#if TEST_STD_VER >= 11
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test(u"ABCDE", 5);
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test(u"a", 1);
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test(u"", 0);
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test(U"ABCDE", 5);
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test(U"a", 1);
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test(U"", 0);
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#endif
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#if TEST_STD_VER > 11
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{
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static_assert(test_ce(2, 3) == 3, "");
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static_assert(test_ce(5, 3) == 3, "");
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static_assert(test_ce(0, 1) == 1, "");
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}
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#endif
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return 0;
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}
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