| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <strstream> |
| |
| // class istrstream |
| |
| // explicit istrstream(char* s, streamsize n); |
| |
| #include <strstream> |
| #include <cassert> |
| #include <string> |
| |
| #include "test_macros.h" |
| |
| int main(int, char**) |
| { |
| { |
| char buf[] = "123 4.5 dog"; |
| std::istrstream in(buf, 7); |
| int i; |
| in >> i; |
| assert(i == 123); |
| double d; |
| in >> d; |
| assert(d == 4.5); |
| std::string s; |
| in >> s; |
| assert(s == ""); |
| assert(in.eof()); |
| assert(in.fail()); |
| in.clear(); |
| in.putback('5'); |
| assert(!in.fail()); |
| in.putback('5'); |
| assert(!in.fail()); |
| assert(buf[5] == '5'); |
| assert(buf[6] == '5'); |
| } |
| |
| return 0; |
| } |