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50 lines
1.3 KiB
C++
50 lines
1.3 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <algorithm>
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// template <class RandomAccessIterator>
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// void
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// random_shuffle(RandomAccessIterator first, RandomAccessIterator last);
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//
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// template <class RandomAccessIterator, class RandomNumberGenerator>
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// void
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// random_shuffle(RandomAccessIterator first, RandomAccessIterator last,
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// RandomNumberGenerator& rand);
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//
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// In C++17, random_shuffle has been removed.
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// However, for backwards compatibility, if _LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE
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// is defined before including <algorithm>, then random_shuffle will be restored.
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// REQUIRES: verify-support
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// MODULES_DEFINES: _LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE
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#define _LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE
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#include <algorithm>
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#include <vector>
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struct gen
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{
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std::ptrdiff_t operator()(std::ptrdiff_t n)
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{
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return n-1;
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}
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};
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int main()
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{
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std::vector<int> v;
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std::random_shuffle(v.begin(), v.end());
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gen r;
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std::random_shuffle(v.begin(), v.end(), r);
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}
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