| //===----------------------------------------------------------------------===// |
| // |
| // 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 Iter, Callable<auto, Iter::reference> Function> |
| // requires CopyConstructible<Function> |
| // constexpr Function // constexpr after C++17 |
| // for_each(Iter first, Iter last, Function f); |
| |
| #include <algorithm> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| #include "test_iterators.h" |
| |
| #if TEST_STD_VER > 17 |
| TEST_CONSTEXPR bool test_constexpr() { |
| int ia[] = {1, 3, 6, 7}; |
| int expected[] = {3, 5, 8, 9}; |
| |
| std::for_each(std::begin(ia), std::end(ia), [](int &a) { a += 2; }); |
| return std::equal(std::begin(ia), std::end(ia), std::begin(expected)) |
| ; |
| } |
| #endif |
| |
| struct for_each_test |
| { |
| for_each_test(int c) : count(c) {} |
| int count; |
| void operator()(int& i) {++i; ++count;} |
| }; |
| |
| int main() |
| { |
| int ia[] = {0, 1, 2, 3, 4, 5}; |
| const unsigned s = sizeof(ia)/sizeof(ia[0]); |
| for_each_test f = std::for_each(input_iterator<int*>(ia), |
| input_iterator<int*>(ia+s), |
| for_each_test(0)); |
| assert(f.count == s); |
| for (unsigned i = 0; i < s; ++i) |
| assert(ia[i] == static_cast<int>(i+1)); |
| |
| #if TEST_STD_VER > 17 |
| static_assert(test_constexpr()); |
| #endif |
| } |