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120 lines
4.5 KiB
C++
120 lines
4.5 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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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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// constexpr bool // constexpr after c++17
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// equal(Iter1 first1, Iter1 last1, Iter2 first2, Pred pred);
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//
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// Introduced in C++14:
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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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// constexpr bool // constexpr after c++17
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// equal(Iter1 first1, Iter1 last1, Iter2 first2, Iter2 last2, 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_macros.h"
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#include "test_iterators.h"
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#if TEST_STD_VER > 17
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TEST_CONSTEXPR bool eq(int a, int b) { return a == b; }
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TEST_CONSTEXPR bool test_constexpr() {
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int ia[] = {1, 3, 6, 7};
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int ib[] = {1, 3};
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int ic[] = {1, 3, 5, 7};
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typedef input_iterator<int*> II;
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typedef bidirectional_iterator<int*> BI;
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return !std::equal(std::begin(ia), std::end(ia), std::begin(ic) , eq)
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&& !std::equal(std::begin(ia), std::end(ia), std::begin(ic), std::end(ic), eq)
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&& std::equal(std::begin(ib), std::end(ib), std::begin(ic) , eq)
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&& !std::equal(std::begin(ib), std::end(ib), std::begin(ic), std::end(ic), eq)
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&& std::equal(II(std::begin(ib)), II(std::end(ib)), II(std::begin(ic)) , eq)
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&& !std::equal(BI(std::begin(ib)), BI(std::end(ib)), BI(std::begin(ic)), BI(std::end(ic)), eq)
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;
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}
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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(int, char**)
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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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#if TEST_STD_VER >= 14
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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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#if TEST_STD_VER >= 14
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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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#if TEST_STD_VER > 17
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static_assert(test_constexpr());
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#endif
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return 0;
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}
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