88 lines
2.9 KiB
C++
88 lines
2.9 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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// requires HasEqualTo<Iter1::value_type, Iter2::value_type>
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// constexpr bool // constexpr after c++17
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// equal(Iter1 first1, Iter1 last1, Iter2 first2);
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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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// constexpr bool // constexpr after c++17
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// equal(Iter1 first1, Iter1 last1, Iter2 first2, Iter2 last2);
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#include <algorithm>
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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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template <class Iter1, class Iter2 = Iter1>
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void test_equal() {
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int a[] = {0, 1, 2, 3, 4, 5};
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const unsigned s = sizeof(a) / sizeof(a[0]);
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int b[s] = {0, 1, 2, 5, 4, 5};
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assert(std::equal(Iter1(a), Iter1(a + s), Iter2(a)));
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assert(std::equal(Iter2(a), Iter2(a + s), Iter1(a)));
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assert(!std::equal(Iter1(a), Iter1(a + s), Iter2(b)));
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#if TEST_STD_VER >= 14
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assert(std::equal(Iter1(a), Iter1(a + s), Iter2(a), Iter2(a + s)));
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assert(std::equal(Iter2(a), Iter2(a + s), Iter1(a), Iter1(a + s)));
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assert(!std::equal(Iter1(a), Iter1(a + s), Iter2(a), Iter2(a + s - 1)));
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assert(!std::equal(Iter1(a), Iter1(a + s), Iter2(b), Iter2(b + s)));
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#endif
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}
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#if TEST_STD_VER > 17
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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 cpp17_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))
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&& !std::equal(std::begin(ia), std::end(ia), std::begin(ic), std::end(ic))
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&& std::equal(std::begin(ib), std::end(ib), std::begin(ic))
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&& !std::equal(std::begin(ib), std::end(ib), std::begin(ic), std::end(ic))
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&& std::equal(II(std::begin(ib)), II(std::end(ib)), II(std::begin(ic)))
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&& !std::equal(BI(std::begin(ib)), BI(std::end(ib)), BI(std::begin(ic)), BI(std::end(ic)))
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;
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}
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#endif
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int main(int, char**)
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{
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test_equal<cpp17_input_iterator<const int*> >();
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test_equal<random_access_iterator<const int*> >();
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// Test all combinations of cv-qualifiers:
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test_equal<int*>();
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test_equal<int*, const int*>();
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test_equal<int*, volatile int*>();
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test_equal<int*, const volatile int*>();
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test_equal<const int*>();
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test_equal<const int*, volatile int*>();
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test_equal<const int*, const volatile int*>();
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test_equal<volatile int*>();
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test_equal<volatile int*, const volatile int*>();
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test_equal<const volatile int*>();
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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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