1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 // UNSUPPORTED: c++03, c++11, c++14 10 11 // <algorithm> 12 13 // template <class PopulationIterator, class SampleIterator, class Distance, 14 // class UniformRandomNumberGenerator> 15 // SampleIterator sample(PopulationIterator first, PopulationIterator last, 16 // SampleIterator out, Distance n, 17 // UniformRandomNumberGenerator &&g); 18 19 #include <algorithm> 20 #include <random> 21 #include <cassert> 22 23 #include "test_iterators.h" 24 25 template <class PopulationIterator, class SampleIterator> void test() { 26 int ia[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; 27 const unsigned is = sizeof(ia) / sizeof(ia[0]); 28 const unsigned os = 4; 29 int oa[os]; 30 std::minstd_rand g; 31 std::sample(PopulationIterator(ia), PopulationIterator(ia + is), 32 SampleIterator(oa), os, g); 33 } 34 35 int main(int, char**) { 36 // expected-error-re@*:* {{{{(static_assert|static assertion)}} failed{{( due to requirement '.*')?}}{{.*}}SampleIterator must meet the requirements of RandomAccessIterator}} 37 // expected-error@*:* 2 {{does not provide a subscript operator}} 38 // expected-error@*:* {{invalid operands}} 39 test<cpp17_input_iterator<int *>, cpp17_output_iterator<int *> >(); 40 41 return 0; 42 } 43