1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 // <algorithm> 10 11 // template<InputIterator Iter, class T> 12 // requires HasEqualTo<Iter::value_type, T> 13 // constexpr Iter // constexpr after C++17 14 // find(Iter first, Iter last, const T& value); 15 16 #include <algorithm> 17 #include <cassert> 18 19 #include "test_macros.h" 20 #include "test_iterators.h" 21 22 #if TEST_STD_VER > 17 23 TEST_CONSTEXPR bool test_constexpr() { 24 int ia[] = {1, 3, 5, 2, 4, 6}; 25 int ib[] = {1, 2, 3, 4, 5, 6}; 26 return (std::find(std::begin(ia), std::end(ia), 5) == ia+2) 27 && (std::find(std::begin(ib), std::end(ib), 9) == ib+6) 28 ; 29 } 30 #endif 31 32 int main(int, char**) 33 { 34 int ia[] = {0, 1, 2, 3, 4, 5}; 35 const unsigned s = sizeof(ia)/sizeof(ia[0]); 36 cpp17_input_iterator<const int*> r = std::find(cpp17_input_iterator<const int*>(ia), 37 cpp17_input_iterator<const int*>(ia+s), 3); 38 assert(*r == 3); 39 r = std::find(cpp17_input_iterator<const int*>(ia), cpp17_input_iterator<const int*>(ia+s), 10); 40 assert(r == cpp17_input_iterator<const int*>(ia+s)); 41 42 #if TEST_STD_VER > 17 43 static_assert(test_constexpr()); 44 #endif 45 46 return 0; 47 } 48