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 // Test failure not investigated on GCC 5.
12 // UNSUPPORTED: gcc-5
13 
14 // <algorithm>
15 
16 // template <class PopulationIterator, class SampleIterator, class Distance,
17 //           class UniformRandomNumberGenerator>
18 // SampleIterator sample(PopulationIterator first, PopulationIterator last,
19 //                       SampleIterator out, Distance n,
20 //                       UniformRandomNumberGenerator &&g);
21 
22 #include <algorithm>
23 #include <random>
24 #include <cassert>
25 
26 #include "test_iterators.h"
27 
28 template <class PopulationIterator, class SampleIterator> void test() {
29   int ia[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
30   const unsigned is = sizeof(ia) / sizeof(ia[0]);
31   const unsigned os = 4;
32   int oa[os];
33   std::minstd_rand g;
34   std::sample(PopulationIterator(ia), PopulationIterator(ia + is),
35                             SampleIterator(oa), os, g);
36 }
37 
38 int main(int, char**) {
39   // expected-error-re@algorithm:* {{static_assert failed{{( due to requirement '.*')?}} "SampleIterator must meet the requirements of RandomAccessIterator"}}
40   // expected-error@algorithm:* 2 {{does not provide a subscript operator}}
41   // expected-error@algorithm:* {{invalid operands}}
42   test<input_iterator<int *>, output_iterator<int *> >();
43 
44   return 0;
45 }
46