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// <istream> 11bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 12bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// template <class charT, class traits = char_traits<charT> > 13bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// class basic_istream; 14bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 15bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// operator>>(void*& val); 16bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 17bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include <istream> 18bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include <cassert> 19bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 20bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnanttemplate <class CharT> 21bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantstruct testbuf 22bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant : public std::basic_streambuf<CharT> 23bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant{ 24bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant typedef std::basic_string<CharT> string_type; 25bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant typedef std::basic_streambuf<CharT> base; 26bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantprivate: 27bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant string_type str_; 28bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantpublic: 29bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 30bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant testbuf() {} 31bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant testbuf(const string_type& str) 32bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant : str_(str) 33bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant { 34bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant base::setg(const_cast<CharT*>(str_.data()), 35bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant const_cast<CharT*>(str_.data()), 36bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant const_cast<CharT*>(str_.data()) + str_.size()); 37bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant } 38bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 39bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant CharT* eback() const {return base::eback();} 40bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant CharT* gptr() const {return base::gptr();} 41bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant CharT* egptr() const {return base::egptr();} 42bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant}; 43bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 44bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantint main() 45bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant{ 46bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant { 47bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant std::istream is((std::streambuf*)0); 48bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant void* n = 0; 49bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant is >> n; 50bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(is.fail()); 51bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant } 52bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant { 53bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant testbuf<char> sb("0"); 54bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant std::istream is(&sb); 55bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant void* n = (void*)1; 56bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant is >> n; 57bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(n == 0); 58bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert( is.eof()); 59bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(!is.fail()); 60bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant } 61bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant { 62bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant testbuf<char> sb(" 1 "); 63bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant std::istream is(&sb); 64bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant void* n = 0; 65bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant is >> n; 66bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(n == (void*)1); 67bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(!is.eof()); 68bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(!is.fail()); 69bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant } 70bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant { 71bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant testbuf<wchar_t> sb(L" 1 "); 72bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant std::wistream is(&sb); 73bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant void* n = 0; 74bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant is >> n; 75bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(n == (void*)1); 76bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(!is.eof()); 77bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(!is.fail()); 78bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant } 79ab4cbddb646098c4ffeec558ffce3a442169e410Marshall Clow { 80ab4cbddb646098c4ffeec558ffce3a442169e410Marshall Clow testbuf<char> sb("12345678"); 81ab4cbddb646098c4ffeec558ffce3a442169e410Marshall Clow std::istream is(&sb); 82ab4cbddb646098c4ffeec558ffce3a442169e410Marshall Clow void* n = 0; 83ab4cbddb646098c4ffeec558ffce3a442169e410Marshall Clow is >> n; 84ab4cbddb646098c4ffeec558ffce3a442169e410Marshall Clow assert(n == (void*)0x12345678); 85ab4cbddb646098c4ffeec558ffce3a442169e410Marshall Clow assert( is.eof()); 86ab4cbddb646098c4ffeec558ffce3a442169e410Marshall Clow assert(!is.fail()); 87ab4cbddb646098c4ffeec558ffce3a442169e410Marshall Clow } 88ab4cbddb646098c4ffeec558ffce3a442169e410Marshall Clow { 89ab4cbddb646098c4ffeec558ffce3a442169e410Marshall Clow testbuf<wchar_t> sb(L"12345678"); 90ab4cbddb646098c4ffeec558ffce3a442169e410Marshall Clow std::wistream is(&sb); 91ab4cbddb646098c4ffeec558ffce3a442169e410Marshall Clow void* n = 0; 92ab4cbddb646098c4ffeec558ffce3a442169e410Marshall Clow is >> n; 93ab4cbddb646098c4ffeec558ffce3a442169e410Marshall Clow assert(n == (void*)0x12345678); 94ab4cbddb646098c4ffeec558ffce3a442169e410Marshall Clow assert( is.eof()); 95ab4cbddb646098c4ffeec558ffce3a442169e410Marshall Clow assert(!is.fail()); 96ab4cbddb646098c4ffeec558ffce3a442169e410Marshall Clow } 97bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant} 98