libcxx/test/std/input.output/iostream.format/input.streams/istream/istream.cons/move.pass.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&& rhs);
  15
  16 #include <istream>
  17 #include <cassert>
  18
  19 #include "test_macros.h"
  20
  21 template <class CharT>
  22 struct testbuf
  23     : public std::basic_streambuf<CharT>
  24 {
  25     testbuf() {}
  26 };
  27
  28 template <class CharT>
  29 struct test_istream
  30     : public std::basic_istream<CharT>
  31 {
  32     typedef std::basic_istream<CharT> base;
  33     test_istream(testbuf<CharT>* sb) : base(sb) {}
  34
  35     test_istream(test_istream&& s)
  36         : base(std::move(s)) {}
  37 };
  38
  39 int main(int, char**)
  40 {
  41     {
  42         testbuf<char> sb;
  43         test_istream<char> is1(&sb);
  44         test_istream<char> is(std::move(is1));
  45         assert(is1.rdbuf() == &sb);
  46         assert(is1.gcount() == 0);
  47         assert(is.gcount() == 0);
  48         assert(is.rdbuf() == 0);
  49         assert(is.tie() == 0);
  50         assert(is.fill() == ' ');
  51         assert(is.rdstate() == is.goodbit);
  52         assert(is.exceptions() == is.goodbit);
  53         assert(is.flags() == (is.skipws | is.dec));
  54         assert(is.precision() == 6);
  55         assert(is.getloc().name() == "C");
  56     }
  57 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
  58     {
  59         testbuf<wchar_t> sb;
  60         test_istream<wchar_t> is1(&sb);
  61         test_istream<wchar_t> is(std::move(is1));
  62         assert(is1.gcount() == 0);
  63         assert(is.gcount() == 0);
  64         assert(is1.rdbuf() == &sb);
  65         assert(is.rdbuf() == 0);
  66         assert(is.tie() == 0);
  67         assert(is.fill() == L' ');
  68         assert(is.rdstate() == is.goodbit);
  69         assert(is.exceptions() == is.goodbit);
  70         assert(is.flags() == (is.skipws | is.dec));
  71         assert(is.precision() == 6);
  72         assert(is.getloc().name() == "C");
  73     }
  74 #endif
  75
  76   return 0;
  77 }