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
71 lines
1.6 KiB
C++
71 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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// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
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// <string_view>
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// constexpr basic_string_view(const _CharT* _s)
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// : __data (_s), __size(_Traits::length(_s)) {}
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#include <string_view>
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#include <string>
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#include <cassert>
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#include "test_macros.h"
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#include "constexpr_char_traits.h"
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template<typename CharT>
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size_t StrLen ( const CharT *s ) {
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size_t retVal = 0;
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while ( *s != 0 ) { ++retVal; ++s; }
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return retVal;
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}
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template<typename CharT>
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void test ( const CharT *s ) {
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typedef std::basic_string_view<CharT> SV;
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// I'd love to do this, but it would require traits::length() to be noexcept
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// LIBCPP_ASSERT_NOEXCEPT(SV(s));
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SV sv1 ( s );
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assert ( sv1.size() == StrLen( s ));
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assert ( sv1.data() == s );
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}
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int main(int, char**) {
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test ( "QBCDE" );
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test ( "A" );
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test ( "" );
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test ( L"QBCDE" );
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test ( L"A" );
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test ( L"" );
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#if TEST_STD_VER >= 11
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test ( u"QBCDE" );
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test ( u"A" );
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test ( u"" );
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test ( U"QBCDE" );
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test ( U"A" );
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test ( U"" );
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#endif
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#if TEST_STD_VER > 11
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{
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constexpr std::basic_string_view<char, constexpr_char_traits<char>> sv1 ( "ABCDE" );
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static_assert ( sv1.size() == 5, "");
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}
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#endif
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return 0;
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}
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