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60 lines
1.7 KiB
C++
60 lines
1.7 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_view>
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// constexpr basic_string_view& operator=(const basic_string_view &) noexcept = default;
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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 T>
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#if TEST_STD_VER > 11
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constexpr
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#endif
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bool test (T sv0)
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{
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T sv1;
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sv1 = sv0;
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// We can't just say "sv0 == sv1" here because string_view::compare
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// isn't constexpr until C++17, and we want to support back to C++14
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return sv0.size() == sv1.size() && sv0.data() == sv1.data();
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}
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int main(int, char**) {
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assert( test<std::string_view> ( "1234"));
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#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
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assert( test<std::u8string_view> (u8"1234"));
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#endif
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#if TEST_STD_VER >= 11
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#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
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assert( test<std::u16string_view> ( u"1234"));
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assert( test<std::u32string_view> ( U"1234"));
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#endif
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#endif
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assert( test<std::wstring_view> ( L"1234"));
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#if TEST_STD_VER > 11
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static_assert( test<std::string_view> ({ "abc", 3}), "");
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#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
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static_assert( test<std::u8string_view> ({u8"abc", 3}), "");
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#endif
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#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
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static_assert( test<std::u16string_view> ({ u"abc", 3}), "");
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static_assert( test<std::u32string_view> ({ U"abc", 3}), "");
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#endif
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static_assert( test<std::wstring_view> ({ L"abc", 3}), "");
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#endif
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return 0;
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}
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