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 // int_type get(); 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 30 testbuf() {} 31 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 39 CharT* eback() const {return base::eback();} 40 CharT* gptr() const {return base::gptr();} 41 CharT* egptr() const {return base::egptr();} 42 }; 43 44 int main() 45 { 46 { 47 testbuf<char> sb(" "); 48 std::istream is(&sb); 49 char c = is.get(); 50 assert(!is.eof()); 51 assert(!is.fail()); 52 assert(c == ' '); 53 assert(is.gcount() == 1); 54 } 55 { 56 testbuf<char> sb(" abc"); 57 std::istream is(&sb); 58 char c = is.get(); 59 assert(!is.eof()); 60 assert(!is.fail()); 61 assert(c == ' '); 62 assert(is.gcount() == 1); 63 c = is.get(); 64 assert(!is.eof()); 65 assert(!is.fail()); 66 assert(c == 'a'); 67 assert(is.gcount() == 1); 68 c = is.get(); 69 assert(!is.eof()); 70 assert(!is.fail()); 71 assert(c == 'b'); 72 assert(is.gcount() == 1); 73 c = is.get(); 74 assert(!is.eof()); 75 assert(!is.fail()); 76 assert(c == 'c'); 77 assert(is.gcount() == 1); 78 } 79 { 80 testbuf<wchar_t> sb(L" abc"); 81 std::wistream is(&sb); 82 wchar_t c = is.get(); 83 assert(!is.eof()); 84 assert(!is.fail()); 85 assert(c == L' '); 86 assert(is.gcount() == 1); 87 c = is.get(); 88 assert(!is.eof()); 89 assert(!is.fail()); 90 assert(c == L'a'); 91 assert(is.gcount() == 1); 92 c = is.get(); 93 assert(!is.eof()); 94 assert(!is.fail()); 95 assert(c == L'b'); 96 assert(is.gcount() == 1); 97 c = is.get(); 98 assert(!is.eof()); 99 assert(!is.fail()); 100 assert(c == L'c'); 101 assert(is.gcount() == 1); 102 } 103 } 104
