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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<InputIterator Iter1, InputIterator Iter2,
// Predicate<auto, Iter1::value_type, Iter2::value_type> Pred>
// requires CopyConstructible<Pred>
// bool
// equal(Iter1 first1, Iter1 last1, Iter2 first2, Pred pred);
#include <algorithm>
#include <functional>
#include <cassert>
#include "test_iterators.h"
#if _LIBCPP_STD_VER > 11
#define HAS_FOUR_ITERATOR_VERSION
#endif
int comparison_count = 0;
template <typename T>
bool counting_equals ( const T &a, const T &b ) {
++comparison_count;
return a == b;
}
int main()
{
int ia[] = {0, 1, 2, 3, 4, 5};
const unsigned s = sizeof(ia)/sizeof(ia[0]);
int ib[s] = {0, 1, 2, 5, 4, 5};
assert(std::equal(input_iterator<const int*>(ia),
input_iterator<const int*>(ia+s),
input_iterator<const int*>(ia),
std::equal_to<int>()));
#ifdef HAS_FOUR_ITERATOR_VERSION
assert(std::equal(input_iterator<const int*>(ia),
input_iterator<const int*>(ia+s),
input_iterator<const int*>(ia),
input_iterator<const int*>(ia+s),
std::equal_to<int>()));
assert(std::equal(random_access_iterator<const int*>(ia),
random_access_iterator<const int*>(ia+s),
random_access_iterator<const int*>(ia),
random_access_iterator<const int*>(ia+s),
std::equal_to<int>()));
comparison_count = 0;
assert(!std::equal(input_iterator<const int*>(ia),
input_iterator<const int*>(ia+s),
input_iterator<const int*>(ia),
input_iterator<const int*>(ia+s-1),
counting_equals<int>));
assert(comparison_count > 0);
comparison_count = 0;
assert(!std::equal(random_access_iterator<const int*>(ia),
random_access_iterator<const int*>(ia+s),
random_access_iterator<const int*>(ia),
random_access_iterator<const int*>(ia+s-1),
counting_equals<int>));
assert(comparison_count == 0);
#endif
assert(!std::equal(input_iterator<const int*>(ia),
input_iterator<const int*>(ia+s),
input_iterator<const int*>(ib),
std::equal_to<int>()));
#ifdef HAS_FOUR_ITERATOR_VERSION
assert(!std::equal(input_iterator<const int*>(ia),
input_iterator<const int*>(ia+s),
input_iterator<const int*>(ib),
input_iterator<const int*>(ib+s),
std::equal_to<int>()));
assert(!std::equal(random_access_iterator<const int*>(ia),
random_access_iterator<const int*>(ia+s),
random_access_iterator<const int*>(ib),
random_access_iterator<const int*>(ib+s),
std::equal_to<int>()));
#endif
}
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