1//===----------------------------------------------------------------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is dual licensed under the MIT and the University of Illinois Open 6// Source Licenses. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9 10// <strstream> 11 12// class istrstream 13 14// explicit istrstream(char* s, streamsize n); 15 16#include <strstream> 17#include <cassert> 18#include <string> 19 20int main() 21{ 22 { 23 char buf[] = "123 4.5 dog"; 24 std::istrstream in(buf, 7); 25 int i; 26 in >> i; 27 assert(i == 123); 28 double d; 29 in >> d; 30 assert(d == 4.5); 31 std::string s; 32 in >> s; 33 assert(s == ""); 34 assert(in.eof()); 35 assert(in.fail()); 36 in.clear(); 37 in.putback('5'); 38 assert(!in.fail()); 39 in.putback('5'); 40 assert(!in.fail()); 41 assert(buf[5] == '5'); 42 assert(buf[6] == '5'); 43 } 44} 45