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 // <ostream> 11 12 // template <class charT, class traits = char_traits<charT> > 13 // class basic_ostream; 14 15 // basic_ostream<charT,traits>& operator<<(ios_base& (*pf)(ios_base&)); 16 17 #include <ostream> 18 #include <cassert> 19 20 template <class CharT> 21 class testbuf 22 : public std::basic_streambuf<CharT> 23 { 24 typedef std::basic_streambuf<CharT> base; 25 std::basic_string<CharT> str_; 26 public: 27 testbuf() 28 { 29 } 30 31 std::basic_string<CharT> str() const 32 {return std::basic_string<CharT>(base::pbase(), base::pptr());} 33 34 protected: 35 36 virtual typename base::int_type 37 overflow(typename base::int_type ch = base::traits_type::eof()) 38 { 39 if (ch != base::traits_type::eof()) 40 { 41 int n = static_cast<int>(str_.size()); 42 str_.push_back(static_cast<CharT>(ch)); 43 str_.resize(str_.capacity()); 44 base::setp(const_cast<CharT*>(str_.data()), 45 const_cast<CharT*>(str_.data() + str_.size())); 46 base::pbump(n+1); 47 } 48 return ch; 49 } 50 }; 51 52 int main() 53 { 54 { 55 testbuf<char> sb; 56 std::ostream os(&sb); 57 assert(!(os.flags() & std::ios_base::uppercase)); 58 os << std::uppercase; 59 assert( (os.flags() & std::ios_base::uppercase)); 60 } 61 } 62
