773ae44124
C++20 revised the definition of what it means to be an iterator. While all _Cpp17InputIterators_ satisfy `std::input_iterator`, the reverse isn't true. D100271 introduces a new test adaptor to accommodate this new definition (`cpp20_input_iterator`). In order to help readers immediately distinguish which input iterator adaptor is _Cpp17InputIterator_, the current `input_iterator` adaptor has been prefixed with `cpp17_`. Differential Revision: https://reviews.llvm.org/D101242
46 lines
1.6 KiB
C++
46 lines
1.6 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++03, c++11, c++14
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// Test failure not investigated on GCC 5.
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// UNSUPPORTED: gcc-5
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// <algorithm>
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// template <class PopulationIterator, class SampleIterator, class Distance,
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// class UniformRandomNumberGenerator>
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// SampleIterator sample(PopulationIterator first, PopulationIterator last,
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// SampleIterator out, Distance n,
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// UniformRandomNumberGenerator &&g);
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#include <algorithm>
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#include <random>
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#include <cassert>
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#include "test_iterators.h"
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template <class PopulationIterator, class SampleIterator> void test() {
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int ia[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
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const unsigned is = sizeof(ia) / sizeof(ia[0]);
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const unsigned os = 4;
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int oa[os];
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std::minstd_rand g;
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std::sample(PopulationIterator(ia), PopulationIterator(ia + is),
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SampleIterator(oa), os, g);
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}
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int main(int, char**) {
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// expected-error-re@algorithm:* {{static_assert failed{{( due to requirement '.*')?}} "SampleIterator must meet the requirements of RandomAccessIterator"}}
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// expected-error@algorithm:* 2 {{does not provide a subscript operator}}
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// expected-error@algorithm:* {{invalid operands}}
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test<cpp17_input_iterator<int *>, output_iterator<int *> >();
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return 0;
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}
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