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, Callable<auto, Iter::reference> Function> 13 // requires CopyConstructible<Function> 14 // constexpr Function // constexpr after C++17 15 // for_each(Iter first, Iter last, Function f); 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 24 TEST_CONSTEXPR bool test_constexpr() { 25 int ia[] = {1, 3, 6, 7}; 26 int expected[] = {3, 5, 8, 9}; 27 28 std::for_each(std::begin(ia), std::end(ia), [](int &a) { a += 2; }); 29 return std::equal(std::begin(ia), std::end(ia), std::begin(expected)) 30 ; 31 } 32 #endif 33 34 struct for_each_test 35 { 36 for_each_test(int c) : count(c) {} 37 int count; 38 void operator()(int& i) {++i; ++count;} 39 }; 40 41 int main() 42 { 43 int ia[] = {0, 1, 2, 3, 4, 5}; 44 const unsigned s = sizeof(ia)/sizeof(ia[0]); 45 for_each_test f = std::for_each(input_iterator<int*>(ia), 46 input_iterator<int*>(ia+s), 47 for_each_test(0)); 48 assert(f.count == s); 49 for (unsigned i = 0; i < s; ++i) 50 assert(ia[i] == static_cast<int>(i+1)); 51 52 #if TEST_STD_VER > 17 53 static_assert(test_constexpr()); 54 #endif 55 } 56
