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