d2baefae68
All supported compilers that support C++20 now support concepts. So, remove `_LIB_LIBCPP_HAS_NO_CONCEPTS` in favor of `_LIBCPP_STD_VER > 17`. Similarly in the tests, remove `// UNSUPPORTED: libcpp-no-concepts`. Differential Revision: https://reviews.llvm.org/D121528
57 lines
1.6 KiB
C++
57 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: c++03, c++11, c++14, c++17, c++20
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// UNSUPPORTED: libcpp-has-no-incomplete-ranges
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// <string_view>
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// template<class Range>
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// basic_string_view(Range&&) -> basic_string_view<ranges::range_value_t<Range>>; // C++23
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#include <string_view>
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#include <cassert>
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#include "make_string.h"
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#include "test_iterators.h"
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#include "test_macros.h"
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template<class CharT>
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void test() {
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auto val = MAKE_STRING(CharT, "test");
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auto sv = std::basic_string_view(val);
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ASSERT_SAME_TYPE(decltype(sv), std::basic_string_view<CharT>);
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assert(sv.size() == val.size());
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assert(sv.data() == val.data());
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}
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void test() {
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test<char>();
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#ifndef TEST_HAS_NO_WIDE_CHARACTERS
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test<wchar_t>();
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#endif
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test<char8_t>();
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test<char16_t>();
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test<char32_t>();
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test<char>();
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struct Widget {
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const char16_t *data_ = u"foo";
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contiguous_iterator<const char16_t*> begin() const { return contiguous_iterator<const char16_t*>(data_); }
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contiguous_iterator<const char16_t*> end() const { return contiguous_iterator<const char16_t*>(data_ + 3); }
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};
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std::basic_string_view bsv = Widget();
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ASSERT_SAME_TYPE(decltype(bsv), std::basic_string_view<char16_t>);
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}
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int main(int, char**) {
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test();
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return 0;
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}
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