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 #include <streambuf>
  19
  20 #include "test_macros.h"
  21
  22 template <class CharT>
  23 struct testbuf
  24     : public std::basic_streambuf<CharT>
  25 {
  26     testbuf() {}
  27 };
  28
  29 template <class CharT>
  30 struct test_istream
  31     : public std::basic_istream<CharT>
  32 {
  33     typedef std::basic_istream<CharT> base;
  34     test_istream(testbuf<CharT>* sb) : base(sb) {}
  35
  36     test_istream(test_istream&& s)
  37         : base(std::move(s)) {}
  38 };
  39
  40 int main(int, char**)
  41 {
  42     {
  43         testbuf<char> sb;
  44         test_istream<char> is1(&sb);
  45         test_istream<char> is(std::move(is1));
  46         assert(is1.rdbuf() == &sb);
  47         assert(is1.gcount() == 0);
  48         assert(is.gcount() == 0);
  49         assert(is.rdbuf() == 0);
  50         assert(is.tie() == 0);
  51         assert(is.fill() == ' ');
  52         assert(is.rdstate() == is.goodbit);
  53         assert(is.exceptions() == is.goodbit);
  54         assert(is.flags() == (is.skipws | is.dec));
  55         assert(is.precision() == 6);
  56         assert(is.getloc().name() == "C");
  57     }
  58 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
  59     {
  60         testbuf<wchar_t> sb;
  61         test_istream<wchar_t> is1(&sb);
  62         test_istream<wchar_t> is(std::move(is1));
  63         assert(is1.gcount() == 0);
  64         assert(is.gcount() == 0);
  65         assert(is1.rdbuf() == &sb);
  66         assert(is.rdbuf() == 0);
  67         assert(is.tie() == 0);
  68         assert(is.fill() == L' ');
  69         assert(is.rdstate() == is.goodbit);
  70         assert(is.exceptions() == is.goodbit);
  71         assert(is.flags() == (is.skipws | is.dec));
  72         assert(is.precision() == 6);
  73         assert(is.getloc().name() == "C");
  74     }
  75 #endif
  76
  77   return 0;
  78 }