Dan Albert | 287553d | 2017-02-16 10:47:51 -0800 | [diff] [blame] | 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 | |
| 20 | int 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 | } |