| // Copyright 2014 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| |
| use std::string::String; |
| |
| struct StringBuffer { |
| s: String, |
| } |
| |
| impl StringBuffer { |
| pub fn append(&mut self, v: &str) { |
| self.s.push_str(v); |
| } |
| } |
| |
| fn to_string(sb: StringBuffer) -> String { |
| sb.s |
| } |
| |
| pub fn main() { |
| let mut sb = StringBuffer { |
| s: String::new(), |
| }; |
| sb.append("Hello, "); |
| sb.append("World!"); |
| let str = to_string(sb); |
| assert_eq!(str, "Hello, World!"); |
| } |