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<InputIterator Iter, class T>
13 // requires HasEqualTo<Iter::value_type, T>
14 // constexpr Iter // constexpr after C++17
15 // find(Iter first, Iter last, const T& value);
16
17 #include <algorithm>
18 #include <cassert>
19
20 #include "test_macros.h"
21 #include "test_iterators.h"
22
23 #if TEST_STD_VER > 17
test_constexpr()24 TEST_CONSTEXPR bool test_constexpr() {
25 int ia[] = {1, 3, 5, 2, 4, 6};
26 int ib[] = {1, 2, 3, 4, 5, 6};
27 return (std::find(std::begin(ia), std::end(ia), 5) == ia+2)
28 && (std::find(std::begin(ib), std::end(ib), 9) == ib+6)
29 ;
30 }
31 #endif
32
main()33 int main()
34 {
35 int ia[] = {0, 1, 2, 3, 4, 5};
36 const unsigned s = sizeof(ia)/sizeof(ia[0]);
37 input_iterator<const int*> r = std::find(input_iterator<const int*>(ia),
38 input_iterator<const int*>(ia+s), 3);
39 assert(*r == 3);
40 r = std::find(input_iterator<const int*>(ia), input_iterator<const int*>(ia+s), 10);
41 assert(r == input_iterator<const int*>(ia+s));
42
43 #if TEST_STD_VER > 17
44 static_assert(test_constexpr());
45 #endif
46 }
47