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