libcxx/test/std/input.output/iostream.format/input.streams/istream/istream.cons/copy.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 // <istream>
  10
  11 // template <class charT, class traits = char_traits<charT> >
  12 // class basic_istream;
  13
  14 // basic_istream(basic_istream const& rhs) = delete;
  15 // basic_istream& operator=(basic_istream const&) = delete;
  16
  17 #include <istream>
  18 #include <type_traits>
  19 #include <cassert>
  20
  21 struct test_istream
  22     : public std::basic_istream<char>
  23 {
  24     typedef std::basic_istream<char> base;
  25
  26     test_istream(test_istream&& s)
  27         : base(std::move(s)) // OK
  28     {
  29     }
  30
  31     test_istream& operator=(test_istream&& s) {
  32       base::operator=(std::move(s)); // OK
  33       return *this;
  34     }
  35
  36     test_istream(test_istream const& s)
  37         : base(s) // expected-error {{call to deleted constructor of 'std::basic_istream<char>'}}
  38     {
  39     }
  40
  41     test_istream& operator=(test_istream const& s) {
  42       base::operator=(s); // expected-error {{call to deleted member function 'operator='}}
  43       return *this;
  44     }
  45
  46 };
  47
  48 int main(int, char**)
  49 {
  50   return 0;
  51 }