ignore.pass.cpp revision f5256e16dfc425c1d466f6308d4026d529ce9e0b
1bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant//===----------------------------------------------------------------------===// 2bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// 3f5256e16dfc425c1d466f6308d4026d529ce9e0bHoward Hinnant// The LLVM Compiler Infrastructure 4bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// 5bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// This file is distributed under the University of Illinois Open Source 6bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// License. See LICENSE.TXT for details. 7bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// 8bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant//===----------------------------------------------------------------------===// 9bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 10bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// <istream> 11bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 12bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// basic_istream<charT,traits>& 13bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// ignore(streamsize n = 1, int_type delim = traits::eof()); 14bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 15bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include <istream> 16bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include <cassert> 17bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 18bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnanttemplate <class CharT> 19bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantstruct testbuf 20bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant : public std::basic_streambuf<CharT> 21bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant{ 22bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant typedef std::basic_string<CharT> string_type; 23bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant typedef std::basic_streambuf<CharT> base; 24bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantprivate: 25bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant string_type str_; 26bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantpublic: 27bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 28bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant testbuf() {} 29bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant testbuf(const string_type& str) 30bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant : str_(str) 31bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant { 32bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant base::setg(const_cast<CharT*>(str_.data()), 33bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant const_cast<CharT*>(str_.data()), 34bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant const_cast<CharT*>(str_.data()) + str_.size()); 35bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant } 36bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 37bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant CharT* eback() const {return base::eback();} 38bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant CharT* gptr() const {return base::gptr();} 39bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant CharT* egptr() const {return base::egptr();} 40bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant}; 41bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 42bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantint main() 43bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant{ 44bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant { 45bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant testbuf<char> sb(" 1\n2345\n6"); 46bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant std::istream is(&sb); 47bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant is.ignore(); 48bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(!is.eof()); 49bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(!is.fail()); 50bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(is.gcount() == 1); 51bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant is.ignore(5, '\n'); 52bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(!is.eof()); 53bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(!is.fail()); 54bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(is.gcount() == 2); 55bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant is.ignore(15); 56bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert( is.eof()); 57bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(!is.fail()); 58bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(is.gcount() == 6); 59bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant } 60bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant { 61bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant testbuf<wchar_t> sb(L" 1\n2345\n6"); 62bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant std::wistream is(&sb); 63bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant is.ignore(); 64bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(!is.eof()); 65bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(!is.fail()); 66bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(is.gcount() == 1); 67bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant is.ignore(5, '\n'); 68bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(!is.eof()); 69bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(!is.fail()); 70bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(is.gcount() == 2); 71bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant is.ignore(15); 72bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert( is.eof()); 73bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(!is.fail()); 74bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(is.gcount() == 6); 75bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant } 76bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant} 77