60 lines
2.5 KiB
C++
60 lines
2.5 KiB
C++
// Copyright (C) 2019-2020 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING3. If not see
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// <http://www.gnu.org/licenses/>.
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// { dg-options "-std=gnu++2a" }
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// { dg-do compile { target c++2a } }
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#include <span>
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using std::span;
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using std::is_nothrow_constructible_v;
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static_assert( is_nothrow_constructible_v<span<int>> );
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static_assert( is_nothrow_constructible_v<span<int, 0>> );
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static_assert( is_nothrow_constructible_v<span<int>, span<int>&> );
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static_assert( is_nothrow_constructible_v<span<const int>, span<int>&> );
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static_assert( is_nothrow_constructible_v<span<int>, span<int, 1>&> );
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static_assert( is_nothrow_constructible_v<span<const int>, span<int, 1>&> );
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static_assert( is_nothrow_constructible_v<span<int, 1>, span<int, 1>&> );
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static_assert( is_nothrow_constructible_v<span<const int, 1>, span<int, 1>&> );
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static_assert( is_nothrow_constructible_v<span<int>, int(&)[1]> );
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static_assert( is_nothrow_constructible_v<span<int, 1>, int(&)[1]> );
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static_assert( is_nothrow_constructible_v<span<int>, std::array<int, 1>&> );
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static_assert( is_nothrow_constructible_v<span<int, 1>, std::array<int, 1>&> );
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template<bool>
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struct sentinel { int* p; };
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template<bool B>
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bool operator==(sentinel<B> s, int* p) noexcept { return s.p == p; }
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template<bool B>
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std::ptrdiff_t operator-(sentinel<B> s, int* p) noexcept(B) { return s.p - p; }
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template<bool B>
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std::ptrdiff_t operator-(int* p, sentinel<B> s) noexcept { return p - s.p; }
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static_assert(std::sized_sentinel_for<sentinel<true>, int*>);
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static_assert(std::sized_sentinel_for<sentinel<false>, int*>);
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static_assert(is_nothrow_constructible_v<span<int>, int*, std::size_t>);
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static_assert(is_nothrow_constructible_v<span<int>, int*, const int*>);
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static_assert(is_nothrow_constructible_v<span<int>, int*, sentinel<true>>);
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static_assert(!is_nothrow_constructible_v<span<int>, int*, sentinel<false>>);
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