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 // XFAIL: with_system_lib=x86_64-apple-darwin11 11 // XFAIL: with_system_lib=x86_64-apple-darwin12 12 13 // <istream> 14 15 // basic_istream<charT,traits>& get(char_type& c); 16 17 #include <istream> 18 #include <cassert> 19 20 template <class CharT> 21 struct testbuf 22 : public std::basic_streambuf<CharT> 23 { 24 typedef std::basic_string<CharT> string_type; 25 typedef std::basic_streambuf<CharT> base; 26 private: 27 string_type str_; 28 public: 29 testbuftestbuf30 testbuf() {} testbuftestbuf31 testbuf(const string_type& str) 32 : str_(str) 33 { 34 base::setg(const_cast<CharT*>(str_.data()), 35 const_cast<CharT*>(str_.data()), 36 const_cast<CharT*>(str_.data()) + str_.size()); 37 } 38 ebacktestbuf39 CharT* eback() const {return base::eback();} gptrtestbuf40 CharT* gptr() const {return base::gptr();} egptrtestbuf41 CharT* egptr() const {return base::egptr();} 42 }; 43 main()44int main() 45 { 46 { 47 testbuf<char> sb(" "); 48 std::istream is(&sb); 49 char c; 50 is.get(c); 51 assert(!is.eof()); 52 assert(!is.fail()); 53 assert(c == ' '); 54 assert(is.gcount() == 1); 55 } 56 { 57 testbuf<char> sb(" abc"); 58 std::istream is(&sb); 59 char c; 60 is.get(c); 61 assert(!is.eof()); 62 assert(!is.fail()); 63 assert(c == ' '); 64 assert(is.gcount() == 1); 65 is.get(c); 66 assert(!is.eof()); 67 assert(!is.fail()); 68 assert(c == 'a'); 69 assert(is.gcount() == 1); 70 is.get(c); 71 assert(!is.eof()); 72 assert(!is.fail()); 73 assert(c == 'b'); 74 assert(is.gcount() == 1); 75 is.get(c); 76 assert(!is.eof()); 77 assert(!is.fail()); 78 assert(c == 'c'); 79 assert(is.gcount() == 1); 80 } 81 { 82 testbuf<wchar_t> sb(L" abc"); 83 std::wistream is(&sb); 84 wchar_t c; 85 is.get(c); 86 assert(!is.eof()); 87 assert(!is.fail()); 88 assert(c == L' '); 89 assert(is.gcount() == 1); 90 is.get(c); 91 assert(!is.eof()); 92 assert(!is.fail()); 93 assert(c == L'a'); 94 assert(is.gcount() == 1); 95 is.get(c); 96 assert(!is.eof()); 97 assert(!is.fail()); 98 assert(c == L'b'); 99 assert(is.gcount() == 1); 100 is.get(c); 101 assert(!is.eof()); 102 assert(!is.fail()); 103 assert(c == L'c'); 104 assert(is.gcount() == 1); 105 } 106 } 107