libcxx/test/std/containers/sequences/deque/deque.cons/deduct.fail.cpp

   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 // <array>
  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 //    deque(InputIterator, InputIterator, Allocator = Allocator())
  16 //    -> deque<typename iterator_traits<InputIterator>::value_type, Allocator>;
  17 //
  18
  19
  20 #include <deque>
  21 #include <iterator>
  22 #include <cassert>
  23 #include <cstddef>
  24 #include <climits> // INT_MAX
  25
  26 struct A {};
  27
  28 int main(int, char**)
  29 {
  30 //  Test the explicit deduction guides
  31
  32 //  Test the implicit deduction guides
  33     {
  34 //  deque (allocator &)
  35     std::deque deq((std::allocator<int>()));  // expected-error {{no viable constructor or deduction guide for deduction of template arguments of 'deque'}}
  36 //  Note: The extra parens are necessary, since otherwise clang decides it is a function declaration.
  37 //  Also, we can't use {} instead of parens, because that constructs a
  38 //      deque<allocator<int>, allocator<allocator<int>>>
  39     }
  40
  41
  42   return 0;
  43 }