| 1 | //===----------------------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | // UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14) |
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| 10 | |
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| 11 | // <string_view> |
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| 12 | |
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| 13 | // template<class charT, class traits, class Allocator> |
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| 14 | // basic_ostream<charT, traits>& |
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| 15 | // operator<<(basic_ostream<charT, traits>& os, |
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| 16 | // const basic_string_view<charT,traits> str); |
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| 17 | |
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| 18 | #include <iosfwd> |
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| 19 | #include <string_view> |
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| 20 | #include <utility> |
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| 21 | |
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| 22 | template <class SV, class = void> |
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| 23 | struct HasDecl : std::false_type {}; |
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| 24 | template <class SV> |
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| 25 | struct HasDecl<SV, decltype(static_cast<void>(std::declval<std::ostream&>() << std::declval<SV&>()))> : std::true_type { |
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| 26 | }; |
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| 27 | |
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| 28 | static_assert(HasDecl<std::string_view>::value, "streaming operator declaration not present" ); |
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| 29 | |
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