mirror of
https://github.com/autc04/Retro68.git
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86 lines
3.0 KiB
C++
86 lines
3.0 KiB
C++
// Copyright (C) 2019-2022 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 <ranges>
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#include <span>
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#include <string_view>
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#include <experimental/string_view>
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#include <vector>
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#include <vector>
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#include <set>
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#include <unordered_set>
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#include <regex>
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#include <testsuite_iterators.h>
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static_assert(std::ranges::view<std::span<int>>);
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static_assert(std::ranges::view<std::span<int, 0>>);
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static_assert(std::ranges::view<std::span<int, 1>>); // Changed with P2325R3
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static_assert(std::ranges::view<std::string_view>);
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static_assert(std::ranges::view<std::experimental::string_view>);
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static_assert(!std::ranges::view<std::vector<int>>);
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static_assert(!std::ranges::view<const std::vector<int>>);
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static_assert(!std::ranges::view<std::initializer_list<int>>);
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static_assert(!std::ranges::view<const std::initializer_list<int>>);
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static_assert(!std::ranges::view<std::set<int>>);
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static_assert(!std::ranges::view<const std::set<int>>);
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static_assert(!std::ranges::view<std::multiset<int>>);
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static_assert(!std::ranges::view<std::unordered_set<int>>);
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static_assert(!std::ranges::view<std::unordered_multiset<int>>);
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static_assert(!std::ranges::view<std::cmatch>);
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// const test_random_access_range<T> is not a range:
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static_assert(!std::ranges::view<__gnu_test::test_random_access_range<int>>);
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template<typename T>
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struct test_view
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: __gnu_test::test_random_access_range<T>, std::ranges::view_base
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{ };
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static_assert(std::ranges::view<test_view<int>>);
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template<>
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constexpr bool std::ranges::enable_view<test_view<long>> = false;
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static_assert(!std::ranges::view<test_view<long>>);
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void
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test01()
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{
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// Verify LWG 3549 changes to ranges::enable_view.
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using std::ranges::view_interface;
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struct v1
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: __gnu_test::test_random_access_range<int>, view_interface<v1> { };
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static_assert(!std::derived_from<v1, std::ranges::view_base>);
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static_assert(std::ranges::enable_view<v1>);
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struct v2 : v1, view_interface<v2> { };
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static_assert(!std::derived_from<v2, std::ranges::view_base>);
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static_assert(!std::ranges::enable_view<v2>);
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struct v3 : __gnu_test::test_random_access_range<int> { };
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static_assert(!std::derived_from<v3, std::ranges::view_base>);
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static_assert(!std::ranges::enable_view<v3>);
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struct v4 { };
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static_assert(!std::ranges::enable_view<view_interface<v4>>);
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}
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