Function is_punctuation

fn is_punctuation(input_str: &str) -> bool

Helper function to determine if a string is a single punctuation character.

Arguments

• input_str - A string slice to check.

Returns

Returns true if the string is a single punctuation character or symbol currency, otherwise false.

Example

use lexer::is_punctuation;
assert!(is_punctuation("!"));
assert!(!is_punctuation("Hello"));
assert!(is_punctuation("$"));