rexen

gleam add rexen

import rexen

pub fn main() {
    let assert Ok(nfa) = rexen.new("(ab)*")
    rexen.compute(nfa, "ab") // -> True
    rexen.compute(nfa, "ababab") // -> True
    rexen.compute(nfa, "ababa") // -> False
    rexen.compute(nfa, "a") // -> False
}

Features

Rexen supports a core set of regular expression operations, including:

Operator	Description	Expression	Matches
*	Zero or more of the preceding character or group of characters	a*	"", "a", "aa" "aaa"
+	One or more of the preceding character or group of characters	a+	"a", "aa", "aaa"
?	Zero or one of the preceding character or group of characters	a?	"", "a"
|	Matches either the expression before or after the operator	a|b	"a", "b"
()	Groups characters or expressions	(ab)+	"ab", "abab", "ababab"

Note: Concatenation is implicit in rexen. ie the expression abc matches a followed by b and c - "abc"

Further documentation can be found at https://hexdocs.pm/rexen.

Development

gleam test  # Run the tests