gcc/libstdc++-v3/testsuite/experimental/algorithm/shuffle.cc
2021-01-04 10:26:59 +01:00

66 lines
1.9 KiB
C++

// { dg-do run { target c++14 } }
// { dg-require-cstdint "" }
// { dg-require-effective-target random_device }
// { dg-require-effective-target tls_runtime }
// { dg-add-options tls }
// Derived from: 2010-03-19 Paolo Carlini <paolo.carlini@oracle.com>
// Copyright (C) 2010-2021 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/>.
#include <experimental/algorithm>
#include <vector>
#include <testsuite_hooks.h>
void test01()
{
for (unsigned size = 0; size < 50; ++size)
{
std::vector<int> vref(size);
std::iota(vref.begin(), vref.end(), 0);
std::vector<int> v1(vref), v2(vref);
std::experimental::shuffle(v1.begin(), v1.end());
std::experimental::shuffle(v2.begin(), v2.end());
if (size >= 10)
{
VERIFY( !std::equal(v1.begin(), v1.end(), vref.begin()) );
VERIFY( !std::equal(v2.begin(), v2.end(), vref.begin()) );
VERIFY( !std::equal(v1.begin(), v1.end(), v2.begin()) );
}
for (unsigned ind = 0; ind < size; ++ind)
{
auto it1 = std::find(v1.begin(), v1.end(), vref[ind]);
auto it2 = std::find(v2.begin(), v2.end(), vref[ind]);
VERIFY( it1 != v1.end() );
VERIFY( it2 != v2.end() );
v1.erase(it1);
v2.erase(it2);
}
VERIFY( v1.empty() );
VERIFY( v2.empty() );
}
}
int main()
{
test01();
}