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 // UNSUPPORTED: c++03, c++11, c++14, c++17 9 10 // <span> 11 12 // template <class It, class End> 13 // constexpr explicit(Extent != dynamic_extent) span(It first, End last); 14 // Requires: [first, last) shall be a valid range. 15 // If Extent is not equal to dynamic_extent, then last - first shall be equal to Extent. 16 // 17 18 #include <cstddef> 19 #include <iterator> 20 #include <span> 21 22 template<class T, std::size_t Extent> 23 std::span<T, Extent> createImplicitSpan(T* first, T* last) { 24 return {first, last}; // expected-error {{chosen constructor is explicit in copy-initialization}} 25 } 26 27 void f() { 28 // explicit constructor necessary 29 int arr[] = {1, 2, 3}; 30 createImplicitSpan<int, 1>(std::begin(arr), std::end(arr)); 31 } 32