sgetn.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// <streambuf> 11 12// template <class charT, class traits = char_traits<charT> > 13// class basic_streambuf; 14 15// streamsize sgetn(char_type* s, streamsize n); 16 17#include <streambuf> 18#include <cassert> 19 20int xsgetn_called = 0; 21 22struct test 23 : public std::basic_streambuf<char> 24{ 25 test() {} 26 27protected: 28 std::streamsize xsgetn(char_type* s, std::streamsize n) 29 { 30 ++xsgetn_called; 31 return 10; 32 } 33}; 34 35int main() 36{ 37 test t; 38 assert(xsgetn_called == 0); 39 assert(t.sgetn(0, 0) == 10); 40 assert(xsgetn_called == 1); 41} 42