llvm-project/libcxx/test/std/algorithms/alg.modifying.operations/alg.partitions/is_partitioned.pass.cpp

78 lines
3.1 KiB
C++

//===----------------------------------------------------------------------===//
//
// 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 <class InputIterator, class Predicate>
// bool
// is_partitioned(InputIterator first, InputIterator last, Predicate pred);
#include <algorithm>
#include <cassert>
#include "test_iterators.h"
#include "counting_predicates.hpp"
struct is_odd
{
bool operator()(const int& i) const {return i & 1;}
};
int main()
{
{
const int ia[] = {1, 2, 3, 4, 5, 6};
unary_counting_predicate<is_odd, int> pred((is_odd()));
assert(!std::is_partitioned(input_iterator<const int*>(std::begin(ia)),
input_iterator<const int*>(std::end(ia)),
std::ref(pred)));
assert(pred.count() <= std::distance(std::begin(ia), std::end(ia)));
}
{
const int ia[] = {1, 3, 5, 2, 4, 6};
unary_counting_predicate<is_odd, int> pred((is_odd()));
assert( std::is_partitioned(input_iterator<const int*>(std::begin(ia)),
input_iterator<const int*>(std::end(ia)),
std::ref(pred)));
assert(pred.count() <= std::distance(std::begin(ia), std::end(ia)));
}
{
const int ia[] = {2, 4, 6, 1, 3, 5};
unary_counting_predicate<is_odd, int> pred((is_odd()));
assert(!std::is_partitioned(input_iterator<const int*>(std::begin(ia)),
input_iterator<const int*>(std::end(ia)),
std::ref(pred)));
assert(pred.count() <= std::distance(std::begin(ia), std::end(ia)));
}
{
const int ia[] = {1, 3, 5, 2, 4, 6, 7};
unary_counting_predicate<is_odd, int> pred((is_odd()));
assert(!std::is_partitioned(input_iterator<const int*>(std::begin(ia)),
input_iterator<const int*>(std::end(ia)),
std::ref(pred)));
assert(pred.count() <= std::distance(std::begin(ia), std::end(ia)));
}
{
const int ia[] = {1, 3, 5, 2, 4, 6, 7};
unary_counting_predicate<is_odd, int> pred((is_odd()));
assert( std::is_partitioned(input_iterator<const int*>(std::begin(ia)),
input_iterator<const int*>(std::begin(ia)),
std::ref(pred)));
assert(pred.count() <= std::distance(std::begin(ia), std::begin(ia)));
}
{
const int ia[] = {1, 3, 5, 7, 9, 11, 2};
unary_counting_predicate<is_odd, int> pred((is_odd()));
assert( std::is_partitioned(input_iterator<const int*>(std::begin(ia)),
input_iterator<const int*>(std::end(ia)),
std::ref(pred)));
assert(pred.count() <= std::distance(std::begin(ia), std::end(ia)));
}
}