1bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant//===----------------------------------------------------------------------===// 2bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// 3f5256e16dfc425c1d466f6308d4026d529ce9e0bHoward Hinnant// The LLVM Compiler Infrastructure 4bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// 5b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// This file is dual licensed under the MIT and the University of Illinois Open 6b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// Source Licenses. See LICENSE.TXT for details. 7bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// 8bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant//===----------------------------------------------------------------------===// 9bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 10bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// <streambuf> 11bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 12bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// template <class charT, class traits = char_traits<charT> > 13bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// class basic_streambuf; 14bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 15bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// int_type snextc(); 16bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 17bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include <streambuf> 18bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include <cassert> 19bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 20bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantint uflow_called = 0; 21bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 22bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantstruct test 23bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant : public std::basic_streambuf<char> 24bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant{ 25bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant typedef std::basic_streambuf<char> base; 26bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 27bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant test() {} 28bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 29bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant void setg(char* gbeg, char* gnext, char* gend) 30bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant { 31bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant base::setg(gbeg, gnext, gend); 32bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant } 33bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 34bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantprotected: 35bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant int_type uflow() 36bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant { 37bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant ++uflow_called; 38bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant return 'a'; 39bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant } 40bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant}; 41bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 42bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantint main() 43bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant{ 44bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant { 45bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant test t; 46bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(uflow_called == 0); 47bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(t.snextc() == -1); 48bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(uflow_called == 1); 49bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant char in[] = "ABC"; 50bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant t.setg(in, in, in+sizeof(in)); 51bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(t.snextc() == 'B'); 52bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(uflow_called == 1); 53bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(t.snextc() == 'C'); 54bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(uflow_called == 1); 55bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant } 56bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant} 57