1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // <algorithm> 11 12 // template<ForwardIterator Iter, EquivalenceRelation<auto, Iter::value_type> Pred> 13 // requires CopyConstructible<Pred> 14 // constexpr Iter // constexpr after C++17 15 // adjacent_find(Iter first, Iter last, Pred pred); 16 17 #include <algorithm> 18 #include <functional> 19 #include <cassert> 20 21 #include "test_macros.h" 22 #include "test_iterators.h" 23 24 25 #if TEST_STD_VER > 17 26 TEST_CONSTEXPR bool eq (int a, int b) { return a == b; } 27 28 TEST_CONSTEXPR bool test_constexpr() { 29 int ia[] = {0, 1, 2, 2, 0, 1, 2, 3}; 30 int ib[] = {0, 1, 2, 7, 0, 1, 2, 3}; 31 32 return (std::adjacent_find(std::begin(ia), std::end(ia), eq) == ia+2) 33 && (std::adjacent_find(std::begin(ib), std::end(ib), eq) == std::end(ib)) 34 ; 35 } 36 #endif 37 38 int main() 39 { 40 int ia[] = {0, 1, 2, 2, 0, 1, 2, 3}; 41 const unsigned sa = sizeof(ia)/sizeof(ia[0]); 42 assert(std::adjacent_find(forward_iterator<const int*>(ia), 43 forward_iterator<const int*>(ia + sa), 44 std::equal_to<int>()) == 45 forward_iterator<const int*>(ia+2)); 46 assert(std::adjacent_find(forward_iterator<const int*>(ia), 47 forward_iterator<const int*>(ia), 48 std::equal_to<int>()) == 49 forward_iterator<const int*>(ia)); 50 assert(std::adjacent_find(forward_iterator<const int*>(ia+3), 51 forward_iterator<const int*>(ia + sa), 52 std::equal_to<int>()) == 53 forward_iterator<const int*>(ia+sa)); 54 55 #if TEST_STD_VER > 17 56 static_assert(test_constexpr()); 57 #endif 58 } 59
