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