ios_base.pass.cpp revision b64f8b07c104c6cc986570ac8ee0ed16a9f23976
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 20int f_called = 0; 21 22std::ios_base& 23f(std::ios_base& is) 24{ 25 ++f_called; 26 return is; 27} 28 29int main() 30{ 31 { 32 std::istream is((std::streambuf*)0); 33 is >> f; 34 assert(f_called == 1); 35 } 36} 37