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 // <memory> 10 11 // UNSUPPORTED: c++03, c++11, c++14, c++17 12 13 // template <class T> constexpr T* to_address(T* p) noexcept; 14 // template <class Ptr> constexpr auto to_address(const Ptr& p) noexcept; 15 16 #include <memory> 17 18 #include <array> 19 #include <cassert> 20 #include <span> 21 #include <string> 22 #include <string_view> 23 #include <valarray> 24 #include <vector> 25 #include "test_macros.h" 26 27 template<class C> test_container_iterators(C c)28void test_container_iterators(C c) 29 { 30 const C& cc = c; 31 assert(std::to_address(c.begin()) == c.data()); 32 assert(std::to_address(c.end()) == c.data() + c.size()); 33 assert(std::to_address(cc.begin()) == cc.data()); 34 assert(std::to_address(cc.end()) == cc.data() + cc.size()); 35 } 36 test_valarray_iterators()37void test_valarray_iterators() 38 { 39 std::valarray<int> v(100); 40 int *p = std::to_address(std::begin(v)); 41 int *q = std::to_address(std::end(v)); 42 assert(q - p == 100); 43 } 44 main(int,char **)45int main(int, char**) { 46 test_container_iterators(std::array<int, 3>()); 47 test_container_iterators(std::vector<int>(3)); 48 test_container_iterators(std::string("abc")); 49 test_container_iterators(std::string_view("abc")); 50 test_container_iterators(std::span<const char>("abc")); 51 test_valarray_iterators(); 52 53 return 0; 54 } 55