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 // <vector> 10 // UNSUPPORTED: c++03, c++11, c++14 11 // UNSUPPORTED: libcpp-no-deduction-guides 12 13 14 // template <class InputIterator, class Allocator = allocator<typename iterator_traits<InputIterator>::value_type>> 15 // vector(InputIterator, InputIterator, Allocator = Allocator()) 16 // -> vector<typename iterator_traits<InputIterator>::value_type, Allocator>; 17 // 18 19 20 #include <deque> 21 #include <iterator> 22 #include <cassert> 23 #include <cstddef> 24 25 26 int main(int, char**) 27 { 28 // Test the explicit deduction guides 29 30 // Test the implicit deduction guides 31 { 32 // vector (allocator &) 33 std::vector vec((std::allocator<int>())); // expected-error {{no viable constructor or deduction guide for deduction of template arguments of 'vector'}} 34 // Note: The extra parens are necessary, since otherwise clang decides it is a function declaration. 35 // Also, we can't use {} instead of parens, because that constructs a 36 // deque<allocator<int>, allocator<allocator<int>>> 37 } 38 39 40 return 0; 41 } 42