short.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// template <class charT, class traits = char_traits<charT> > 13bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// class basic_istream; 14bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 15bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// operator>>(short& 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 short 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 short n = 10; 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(" 123 "); 63bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant std::istream is(&sb); 64bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant short n = 10; 65bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant is >> n; 66bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(n == 123); 67bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(!is.eof()); 68bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(!is.fail()); 69bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant } 70bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant { 71bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant testbuf<wchar_t> sb(L" -1234567890 "); 72bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant std::wistream is(&sb); 73bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant short n = 10; 74bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant is >> n; 75bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(n == std::numeric_limits<short>::min()); 76bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(!is.eof()); 77bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert( is.fail()); 78bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant } 79bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant} 80