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_istream; 14 15 // basic_istream<charT,traits>& operator>>(basic_ios<charT,traits>& 16 // (*pf)(basic_ios<charT,traits>&)); 17 18 #include <istream> 19 #include <cassert> 20 21 int f_called = 0; 22 23 template <class CharT> 24 std::basic_ios<CharT>& 25 f(std::basic_ios<CharT>& is) 26 { 27 ++f_called; 28 return is; 29 } 30 31 int main() 32 { 33 { 34 std::istream is((std::streambuf*)0); 35 is >> f; 36 assert(f_called == 1); 37 } 38 } 39
