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