| // Copyright (C) 2020-2023 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 } } |
| // { dg-require-cstdint "" } |
| |
| #include <algorithm> |
| #include <random> |
| #include <testsuite_hooks.h> |
| #include <testsuite_iterators.h> |
| |
| using __gnu_test::test_range; |
| using __gnu_test::forward_iterator_wrapper; |
| using __gnu_test::input_iterator_wrapper; |
| using __gnu_test::output_iterator_wrapper; |
| using __gnu_test::random_access_iterator_wrapper; |
| |
| namespace ranges = std::ranges; |
| |
| std::mt19937 rng; |
| |
| template<template<typename> typename in_wrapper, |
| template<typename> typename out_wrapper> |
| void |
| test01() |
| { |
| const int x[] = {1,2,3,4,5,6,7,8,9,10}; |
| test_range<const int, in_wrapper> rx(x); |
| int y[10]; |
| test_range<int, out_wrapper> ry(y); |
| auto out = ranges::sample(rx.begin(), rx.end(), ry.begin(), 20, rng); |
| VERIFY( out.ptr == y+10 ); |
| VERIFY( ranges::equal(x, y) ); |
| |
| for (int i = 0; i < 100; i++) |
| { |
| int z[5] = {0}; |
| test_range<int, out_wrapper> rz(z); |
| rx.bounds.first = x; |
| auto out = ranges::sample(rx, rz.begin(), 5, rng); |
| VERIFY( out.ptr == z+5 ); |
| ranges::sort(z); |
| VERIFY( ranges::adjacent_find(z) == out.ptr ); |
| VERIFY( ranges::includes(x, z) ); |
| } |
| } |
| |
| int |
| main() |
| { |
| test01<forward_iterator_wrapper, output_iterator_wrapper>(); |
| test01<input_iterator_wrapper, random_access_iterator_wrapper>(); |
| } |