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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <algorithm>
// template<BidirectionalIterator Iter, StrictWeakOrder<auto, Iter::value_type> Compare>
// requires ShuffleIterator<Iter>
// && CopyConstructible<Compare>
// void
// inplace_merge(Iter first, Iter middle, Iter last, Compare comp);
#include <algorithm>
#include <functional>
#include <random>
#include <cassert>
#include "test_macros.h"
#if TEST_STD_VER >= 11
#include <memory>
struct indirect_less
{
template <class P>
bool operator()(const P& x, const P& y)
{return *x < *y;}
};
struct S {
S() : i_(0) {}
S(int i) : i_(i) {}
S(const S& rhs) : i_(rhs.i_) {}
S( S&& rhs) : i_(rhs.i_) { rhs.i_ = -1; }
S& operator =(const S& rhs) { i_ = rhs.i_; return *this; }
S& operator =( S&& rhs) { i_ = rhs.i_; rhs.i_ = -2; assert(this != &rhs); return *this; }
S& operator =(int i) { i_ = i; return *this; }
bool operator <(const S& rhs) const { return i_ < rhs.i_; }
bool operator >(const S& rhs) const { return i_ > rhs.i_; }
bool operator ==(const S& rhs) const { return i_ == rhs.i_; }
bool operator ==(int i) const { return i_ == i; }
void set(int i) { i_ = i; }
int i_;
};
#endif // TEST_STD_VER >= 11
#include "test_iterators.h"
#include "counting_predicates.hpp"
std::mt19937 randomness;
template <class Iter>
void
test_one(unsigned N, unsigned M)
{
assert(M <= N);
typedef typename std::iterator_traits<Iter>::value_type value_type;
value_type* ia = new value_type[N];
for (unsigned i = 0; i < N; ++i)
ia[i] = i;
std::shuffle(ia, ia+N, randomness);
std::sort(ia, ia+M, std::greater<value_type>());
std::sort(ia+M, ia+N, std::greater<value_type>());
binary_counting_predicate<std::greater<value_type>, value_type, value_type> pred((std::greater<value_type>()));
std::inplace_merge(Iter(ia), Iter(ia+M), Iter(ia+N), std::ref(pred));
if(N > 0)
{
assert(ia[0] == static_cast<int>(N)-1);
assert(ia[N-1] == 0);
assert(std::is_sorted(ia, ia+N, std::greater<value_type>()));
assert(pred.count() <= (N-1));
}
delete [] ia;
}
template <class Iter>
void
test(unsigned N)
{
test_one<Iter>(N, 0);
test_one<Iter>(N, N/4);
test_one<Iter>(N, N/2);
test_one<Iter>(N, 3*N/4);
test_one<Iter>(N, N);
}
template <class Iter>
void
test()
{
test_one<Iter>(0, 0);
test_one<Iter>(1, 0);
test_one<Iter>(1, 1);
test_one<Iter>(2, 0);
test_one<Iter>(2, 1);
test_one<Iter>(2, 2);
test_one<Iter>(3, 0);
test_one<Iter>(3, 1);
test_one<Iter>(3, 2);
test_one<Iter>(3, 3);
test<Iter>(4);
test<Iter>(20);
test<Iter>(100);
test<Iter>(1000);
}
int main()
{
test<bidirectional_iterator<int*> >();
test<random_access_iterator<int*> >();
test<int*>();
#if TEST_STD_VER >= 11
test<bidirectional_iterator<S*> >();
test<random_access_iterator<S*> >();
test<S*>();
{
int N = 100;
unsigned M = 50;
std::unique_ptr<int>* ia = new std::unique_ptr<int>[N];
for (int i = 0; i < N; ++i)
ia[i].reset(new int(i));
std::shuffle(ia, ia+N, randomness);
std::sort(ia, ia+M, indirect_less());
std::sort(ia+M, ia+N, indirect_less());
std::inplace_merge(ia, ia+M, ia+N, indirect_less());
if(N > 0)
{
assert(*ia[0] == 0);
assert(*ia[N-1] == N-1);
assert(std::is_sorted(ia, ia+N, indirect_less()));
}
delete [] ia;
}
#endif // TEST_STD_VER >= 11
}
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