4fc502368a
`string_view` is supported all the way back to C++03 as an extension in `libc++`, and so many of the tests run in all standards modes for all vendors. This is unlikely desired by other standard library vendors using our test suite. So, disable the tests for vendors other than `libc++` in these older standards modes. Differential Revision: https://reviews.llvm.org/D126850
65 lines
1.9 KiB
C++
65 lines
1.9 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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// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
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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 TEST_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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#ifndef TEST_HAS_NO_WIDE_CHARACTERS
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assert( test<std::wstring_view> ( L"1234"));
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#endif
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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 TEST_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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# ifndef TEST_HAS_NO_WIDE_CHARACTERS
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static_assert( test<std::wstring_view> ({ L"abc", 3}), "");
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# endif
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#endif
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return 0;
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}
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