Mercurial > hg > CbC > CbC_gcc
view libstdc++-v3/testsuite/std/ranges/adaptors/reverse.cc @ 152:2b5abeee2509
update gcc11
author | anatofuz |
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date | Mon, 25 May 2020 07:50:57 +0900 |
parents | 1830386684a0 |
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// Copyright (C) 2020 Free Software Foundation, Inc. // // This file is part of the GNU ISO C++ Library. This library is free // software; you can redistribute it and/or modify it under the // terms of the GNU General Public License as published by the // Free Software Foundation; either version 3, or (at your option) // any later version. // This library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // You should have received a copy of the GNU General Public License along // with this library; see the file COPYING3. If not see // <http://www.gnu.org/licenses/>. // { dg-options "-std=gnu++2a" } // { dg-do run { target c++2a } } #include <algorithm> #include <ranges> #include <testsuite_hooks.h> #include <testsuite_iterators.h> using __gnu_test::test_range; using __gnu_test::bidirectional_iterator_wrapper; namespace ranges = std::ranges; namespace views = ranges::views; void test01() { int x[] = {1,2,3,4,5}; auto v = x | views::reverse; VERIFY( ranges::equal(v, (int[]){5,4,3,2,1}) ); VERIFY( ranges::equal(v | views::reverse, x) ); static_assert(ranges::view<decltype(v)>); static_assert(ranges::sized_range<decltype(v)>); static_assert(ranges::common_range<decltype(v)>); static_assert(ranges::random_access_range<decltype(v)>); } void test02() { int x[] = {1,2,3,4,5}; test_range<int, bidirectional_iterator_wrapper> rx(x); auto v = views::reverse(rx); VERIFY( ranges::equal(v, (int[]){5,4,3,2,1}) ); VERIFY( ranges::equal(v | views::reverse, rx) ); static_assert(ranges::view<decltype(v)>); static_assert(!ranges::sized_range<decltype(v)>); static_assert(ranges::common_range<decltype(v)>); static_assert(!ranges::random_access_range<decltype(v)>); static_assert(ranges::bidirectional_range<decltype(v)>); } void test03() { int x[] = {1,7,3,6,5,2,4,8}; auto is_even = [] (int i) { return i%2==0; }; int sum = 0; for (auto i : x | views::reverse | views::filter(is_even)) sum += i; VERIFY( sum == 20 ); } void test04() { int x[] = {1,2,3,4,5}; VERIFY( ranges::equal(x | views::reverse | (views::reverse | views::reverse), (int[]){5,4,3,2,1}) ); } int main() { test01(); test02(); test03(); test04(); }