1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // <istream> 11 12 // template <class charT, class traits = char_traits<charT> > 13 // class basic_iostream; 14 15 // void swap(basic_iostream& rhs); 16 17 #include <istream> 18 #include <cassert> 19 20 template <class CharT> 21 struct testbuf 22 : public std::basic_streambuf<CharT> 23 { testbuftestbuf24 testbuf() {} 25 }; 26 27 template <class CharT> 28 struct test_iostream 29 : public std::basic_iostream<CharT> 30 { 31 typedef std::basic_iostream<CharT> base; test_iostreamtest_iostream32 test_iostream(testbuf<CharT>* sb) : base(sb) {} 33 swaptest_iostream34 void swap(test_iostream& s) {base::swap(s);} 35 }; 36 main()37int main() 38 { 39 { 40 testbuf<char> sb1; 41 testbuf<char> sb2; 42 test_iostream<char> is1(&sb1); 43 test_iostream<char> is2(&sb2); 44 is1.swap(is2); 45 assert(is1.rdbuf() == &sb1); 46 assert(is1.tie() == 0); 47 assert(is1.fill() == ' '); 48 assert(is1.rdstate() == is1.goodbit); 49 assert(is1.exceptions() == is1.goodbit); 50 assert(is1.flags() == (is1.skipws | is1.dec)); 51 assert(is1.precision() == 6); 52 assert(is1.getloc().name() == "C"); 53 assert(is2.rdbuf() == &sb2); 54 assert(is2.tie() == 0); 55 assert(is2.fill() == ' '); 56 assert(is2.rdstate() == is2.goodbit); 57 assert(is2.exceptions() == is2.goodbit); 58 assert(is2.flags() == (is2.skipws | is2.dec)); 59 assert(is2.precision() == 6); 60 assert(is2.getloc().name() == "C"); 61 } 62 { 63 testbuf<wchar_t> sb1; 64 testbuf<wchar_t> sb2; 65 test_iostream<wchar_t> is1(&sb1); 66 test_iostream<wchar_t> is2(&sb2); 67 is1.swap(is2); 68 assert(is1.rdbuf() == &sb1); 69 assert(is1.tie() == 0); 70 assert(is1.fill() == ' '); 71 assert(is1.rdstate() == is1.goodbit); 72 assert(is1.exceptions() == is1.goodbit); 73 assert(is1.flags() == (is1.skipws | is1.dec)); 74 assert(is1.precision() == 6); 75 assert(is1.getloc().name() == "C"); 76 assert(is2.rdbuf() == &sb2); 77 assert(is2.tie() == 0); 78 assert(is2.fill() == ' '); 79 assert(is2.rdstate() == is2.goodbit); 80 assert(is2.exceptions() == is2.goodbit); 81 assert(is2.flags() == (is2.skipws | is2.dec)); 82 assert(is2.precision() == 6); 83 assert(is2.getloc().name() == "C"); 84 } 85 } 86