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_cxx_lib=macosx10.7 11 12 // <istream> 13 14 // int_type get(); 15 16 #include <istream> 17 #include <cassert> 18 19 template <class CharT> 20 struct testbuf 21 : public std::basic_streambuf<CharT> 22 { 23 typedef std::basic_string<CharT> string_type; 24 typedef std::basic_streambuf<CharT> base; 25 private: 26 string_type str_; 27 public: 28 29 testbuf() {} 30 testbuf(const string_type& str) 31 : str_(str) 32 { 33 base::setg(const_cast<CharT*>(str_.data()), 34 const_cast<CharT*>(str_.data()), 35 const_cast<CharT*>(str_.data()) + str_.size()); 36 } 37 38 CharT* eback() const {return base::eback();} 39 CharT* gptr() const {return base::gptr();} 40 CharT* egptr() const {return base::egptr();} 41 }; 42 43 int main() 44 { 45 { 46 testbuf<char> sb(" "); 47 std::istream is(&sb); 48 char c = static_cast<char>(is.get()); 49 assert(!is.eof()); 50 assert(!is.fail()); 51 assert(c == ' '); 52 assert(is.gcount() == 1); 53 } 54 { 55 testbuf<char> sb(" abc"); 56 std::istream is(&sb); 57 char c = static_cast<char>(is.get()); 58 assert(!is.eof()); 59 assert(!is.fail()); 60 assert(c == ' '); 61 assert(is.gcount() == 1); 62 c = static_cast<char>(is.get()); 63 assert(!is.eof()); 64 assert(!is.fail()); 65 assert(c == 'a'); 66 assert(is.gcount() == 1); 67 c = static_cast<char>(is.get()); 68 assert(!is.eof()); 69 assert(!is.fail()); 70 assert(c == 'b'); 71 assert(is.gcount() == 1); 72 c = static_cast<char>(is.get()); 73 assert(!is.eof()); 74 assert(!is.fail()); 75 assert(c == 'c'); 76 assert(is.gcount() == 1); 77 } 78 { 79 testbuf<wchar_t> sb(L" abc"); 80 std::wistream is(&sb); 81 wchar_t c = is.get(); 82 assert(!is.eof()); 83 assert(!is.fail()); 84 assert(c == L' '); 85 assert(is.gcount() == 1); 86 c = is.get(); 87 assert(!is.eof()); 88 assert(!is.fail()); 89 assert(c == L'a'); 90 assert(is.gcount() == 1); 91 c = is.get(); 92 assert(!is.eof()); 93 assert(!is.fail()); 94 assert(c == L'b'); 95 assert(is.gcount() == 1); 96 c = is.get(); 97 assert(!is.eof()); 98 assert(!is.fail()); 99 assert(c == L'c'); 100 assert(is.gcount() == 1); 101 } 102 } 103
