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(const char* s, streamsize n); 15 16 #include <strstream> 17 #include <cassert> 18 19 int main() 20 { 21 { 22 const char buf[] = "123 4.5 dog"; 23 std::istrstream in(buf, 7); 24 int i; 25 in >> i; 26 assert(i == 123); 27 double d; 28 in >> d; 29 assert(d == 4.5); 30 std::string s; 31 in >> s; 32 assert(s == ""); 33 assert(in.eof()); 34 assert(in.fail()); 35 in.clear(); 36 in.putback('5'); 37 assert(!in.fail()); 38 in.putback('5'); 39 assert(in.fail()); 40 assert(buf[5] == '.'); 41 assert(buf[6] == '5'); 42 } 43 } 44
