| //===----------------------------------------------------------------------===// |
| // |
| // 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> |
| // constexpr bool // constexpr after c++17 |
| // equal(Iter1 first1, Iter1 last1, Iter2 first2, Pred pred); |
| // |
| // Introduced in C++14: |
| // template<InputIterator Iter1, InputIterator Iter2, |
| // Predicate<auto, Iter1::value_type, Iter2::value_type> Pred> |
| // requires CopyConstructible<Pred> |
| // constexpr bool // constexpr after c++17 |
| // equal(Iter1 first1, Iter1 last1, Iter2 first2, Iter2 last2, Pred pred); |
| |
| |
| #include <algorithm> |
| #include <functional> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| #include "test_iterators.h" |
| |
| #if TEST_STD_VER > 17 |
| TEST_CONSTEXPR bool eq(int a, int b) { return a == b; } |
| |
| TEST_CONSTEXPR bool test_constexpr() { |
| int ia[] = {1, 3, 6, 7}; |
| int ib[] = {1, 3}; |
| int ic[] = {1, 3, 5, 7}; |
| typedef input_iterator<int*> II; |
| typedef bidirectional_iterator<int*> BI; |
| |
| return !std::equal(std::begin(ia), std::end(ia), std::begin(ic) , eq) |
| && !std::equal(std::begin(ia), std::end(ia), std::begin(ic), std::end(ic), eq) |
| && std::equal(std::begin(ib), std::end(ib), std::begin(ic) , eq) |
| && !std::equal(std::begin(ib), std::end(ib), std::begin(ic), std::end(ic), eq) |
| |
| && std::equal(II(std::begin(ib)), II(std::end(ib)), II(std::begin(ic)) , eq) |
| && !std::equal(BI(std::begin(ib)), BI(std::end(ib)), BI(std::begin(ic)), BI(std::end(ic)), eq) |
| ; |
| } |
| #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>())); |
| #if TEST_STD_VER >= 14 |
| 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>())); |
| #if TEST_STD_VER >= 14 |
| 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 |
| |
| #if TEST_STD_VER > 17 |
| static_assert(test_constexpr()); |
| #endif |
| } |