char

fn char(byte b) -> Result<string, string>

Returns the one-character string whose code point is b.

Values 0..=127 give an ASCII character; 128..=255 give the Latin-1 character with that code point (two bytes of UTF-8, so char(233) is "é"). The result is Err("byte out of range") only if the value is outside 0..=255, which a well-typed byte never is. The inverse is ord.

Parameters#

Returns#

Result<string, string>

Examples#

use tests::assert;
let s = match char(66 as byte) {
    Result::Ok(c) => c,
    Result::Err(_) => "",
};
assert!(s == "B");

See also#

• byte
• ord
• black_box: Returns x unchanged, through a call the optimizer cannot see into.