1 // 2000-06-29 bkoz 2 3 // Copyright (C) 2000-2020 Free Software Foundation, Inc. 4 // 5 // This file is part of the GNU ISO C++ Library. This library is free 6 // software; you can redistribute it and/or modify it under the 7 // terms of the GNU General Public License as published by the 8 // Free Software Foundation; either version 3, or (at your option) 9 // any later version. 10 11 // This library is distributed in the hope that it will be useful, 12 // but WITHOUT ANY WARRANTY; without even the implied warranty of 13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 // GNU General Public License for more details. 15 16 // You should have received a copy of the GNU General Public License along 17 // with this library; see the file COPYING3. If not see 18 // <http://www.gnu.org/licenses/>. 19 20 // 27.6.1.3 unformatted input functions 21 // NB: ostream has a particular "seeks" category. Adopt this for istreams too. 22 // @require@ %-*.tst %-*.txt 23 // @diff@ %-*.tst %-*.txt 24 25 // { dg-require-fileio "" } 26 27 #include <istream> 28 #include <sstream> 29 #include <fstream> 30 #include <testsuite_hooks.h> 31 test01()32void test01() 33 { 34 using namespace std; 35 typedef ios::off_type off_type; 36 typedef ios::pos_type pos_type; 37 38 const char str_lit01[] = "istream_seeks-1.tst"; 39 40 // in 41 istringstream ist1; 42 pos_type p3 = ist1.tellg(); 43 44 ifstream ifs1; 45 pos_type p4 = ifs1.tellg(); 46 47 // N.B. We implement the resolution of DR 453 and 48 // istringstream::tellg() doesn't fail. 49 VERIFY( p3 == pos_type(off_type(0)) ); 50 VERIFY( p4 == pos_type(off_type(-1)) ); 51 52 // in 53 // test ctors leave things in the same positions... 54 istringstream ist2("bob_marley:kaya"); 55 p3 = ist2.tellg(); 56 57 ifstream ifs2(str_lit01); 58 p4 = ifs2.tellg(); 59 60 VERIFY( p3 == p4 ); 61 } 62 main()63int main() 64 { 65 test01(); 66 return 0; 67 } 68