| // Copyright 2012 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::str; |
| |
| pub fn main() { |
| // Chars of 1, 2, 3, and 4 bytes |
| let chs: Vec<char> = vec!['e', 'é', '€', '\u{10000}']; |
| let s: String = chs.iter().cloned().collect(); |
| let schs: Vec<char> = s.chars().collect(); |
| |
| assert_eq!(s.len(), 10); |
| assert_eq!(s.chars().count(), 4); |
| assert_eq!(schs.len(), 4); |
| assert_eq!(schs.iter().cloned().collect::<String>(), s); |
| |
| assert!((str::from_utf8(s.as_bytes()).is_ok())); |
| // invalid prefix |
| assert!((!str::from_utf8(&[0x80]).is_ok())); |
| // invalid 2 byte prefix |
| assert!((!str::from_utf8(&[0xc0]).is_ok())); |
| assert!((!str::from_utf8(&[0xc0, 0x10]).is_ok())); |
| // invalid 3 byte prefix |
| assert!((!str::from_utf8(&[0xe0]).is_ok())); |
| assert!((!str::from_utf8(&[0xe0, 0x10]).is_ok())); |
| assert!((!str::from_utf8(&[0xe0, 0xff, 0x10]).is_ok())); |
| // invalid 4 byte prefix |
| assert!((!str::from_utf8(&[0xf0]).is_ok())); |
| assert!((!str::from_utf8(&[0xf0, 0x10]).is_ok())); |
| assert!((!str::from_utf8(&[0xf0, 0xff, 0x10]).is_ok())); |
| assert!((!str::from_utf8(&[0xf0, 0xff, 0xff, 0x10]).is_ok())); |
| } |
