Function ascii::caret_decode

pub fn caret_decode<C: Copy + Into<u8>>(c: C) -> Option<AsciiChar>

Returns the control code represented by a caret notation letter, or None if the letter is not used in caret notation.

This function is the inverse of caret_encode().

Examples

Basic usage:

assert_eq!(caret_decode(b'?'), Some(AsciiChar::DEL));
assert_eq!(caret_decode(AsciiChar::D), Some(AsciiChar::EOT));
assert_eq!(caret_decode(b'\0'), None);

Symmetry:

assert_eq!(caret_encode(AsciiChar::US).and_then(caret_decode), Some(AsciiChar::US));
assert_eq!(caret_decode(b'@').and_then(caret_encode), Some(AsciiChar::At));