44 lines
1.6 KiB
Rust
44 lines
1.6 KiB
Rust
// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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//
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// ignore-lexer-test FIXME #15679
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use std::str;
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pub fn main() {
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// Chars of 1, 2, 3, and 4 bytes
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let chs: Vec<char> = vec!('e', 'é', '€', '\U00010000');
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let s: String = String::from_chars(chs.as_slice()).to_string();
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let schs: Vec<char> = s.as_slice().chars().collect();
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assert!(s.len() == 10u);
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assert!(s.as_slice().char_len() == 4u);
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assert!(schs.len() == 4u);
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assert!(String::from_chars(schs.as_slice()) == s);
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assert!(s.as_slice().char_at(0u) == 'e');
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assert!(s.as_slice().char_at(1u) == 'é');
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assert!((str::is_utf8(s.as_bytes())));
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// invalid prefix
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assert!((!str::is_utf8([0x80_u8])));
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// invalid 2 byte prefix
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assert!((!str::is_utf8([0xc0_u8])));
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assert!((!str::is_utf8([0xc0_u8, 0x10_u8])));
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// invalid 3 byte prefix
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assert!((!str::is_utf8([0xe0_u8])));
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assert!((!str::is_utf8([0xe0_u8, 0x10_u8])));
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assert!((!str::is_utf8([0xe0_u8, 0xff_u8, 0x10_u8])));
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// invalid 4 byte prefix
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assert!((!str::is_utf8([0xf0_u8])));
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assert!((!str::is_utf8([0xf0_u8, 0x10_u8])));
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assert!((!str::is_utf8([0xf0_u8, 0xff_u8, 0x10_u8])));
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assert!((!str::is_utf8([0xf0_u8, 0xff_u8, 0xff_u8, 0x10_u8])));
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}
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