libcxx/test/std/containers/container.adaptors/stack/stack.cons/deduct.verify.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 // <stack>
  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
  18 #include <stack>
  19 #include <list>
  20 #include <iterator>
  21 #include <cassert>
  22 #include <cstddef>
  23
  24
  25 int main(int, char**)
  26 {
  27 //  Test the explicit deduction guides
  28     {
  29 //  stack(const Container&, const Alloc&);
  30 //  The '45' is not an allocator
  31     std::stack stk(std::list<int>({1,2,3}), 45);  // expected-error {{no viable constructor or deduction guide for deduction of template arguments of 'stack'}}
  32     }
  33
  34     {
  35 //  stack(const stack&, const Alloc&);
  36 //  The '45' is not an allocator
  37     std::stack<int> source;
  38     std::stack stk(source, 45);  // expected-error {{no viable constructor or deduction guide for deduction of template arguments of 'stack'}}
  39     }
  40
  41 //  Test the implicit deduction guides
  42     {
  43 //  stack (allocator &)
  44     std::stack stk((std::allocator<int>()));  // expected-error {{no viable constructor or deduction guide for deduction of template arguments of 'stack'}}
  45 //  Note: The extra parens are necessary, since otherwise clang decides it is a function declaration.
  46 //  Also, we can't use {} instead of parens, because that constructs a
  47 //      stack<allocator<int>, allocator<allocator<int>>>
  48     }
  49
  50
  51   return 0;
  52 }