// 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 or the MIT license // , 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 = vec!('e', 'é', '€', '\U00010000'); let s: String = str::from_chars(chs.as_slice()).to_string(); let schs: Vec = s.as_slice().chars().collect(); assert!(s.len() == 10u); assert!(s.as_slice().char_len() == 4u); assert!(schs.len() == 4u); assert!(str::from_chars(schs.as_slice()).to_string() == s); assert!(s.as_slice().char_at(0u) == 'e'); assert!(s.as_slice().char_at(1u) == 'é'); assert!((str::is_utf8(s.as_bytes()))); // invalid prefix assert!((!str::is_utf8([0x80_u8]))); // invalid 2 byte prefix assert!((!str::is_utf8([0xc0_u8]))); assert!((!str::is_utf8([0xc0_u8, 0x10_u8]))); // invalid 3 byte prefix assert!((!str::is_utf8([0xe0_u8]))); assert!((!str::is_utf8([0xe0_u8, 0x10_u8]))); assert!((!str::is_utf8([0xe0_u8, 0xff_u8, 0x10_u8]))); // invalid 4 byte prefix assert!((!str::is_utf8([0xf0_u8]))); assert!((!str::is_utf8([0xf0_u8, 0x10_u8]))); assert!((!str::is_utf8([0xf0_u8, 0xff_u8, 0x10_u8]))); assert!((!str::is_utf8([0xf0_u8, 0xff_u8, 0xff_u8, 0x10_u8]))); }