Hey! This isn't really a thing you should use yet. This is just an experiment.
square/peg is a macro that provides an alternative notation for writing PEGs in Janet.
It allows you to write (sequence "a" "b") as ["a" "b"], and (choice "a" "b") as ["a" | "b"].
square/peg can take multiple arguments, in which case they behave the same as if they were wrapped in square brackets. So the following two expressions are equivalent:
(square/peg [(? "a") "b"])
(square/peg (? "a") "b")
square/peg implicitly wraps its arguments in quasiquote, so you don't need to manually quote them. You can unquote normally.
(import square)
(peg/match
(square/peg (some [(set "aeiou") (constant :vowel) | 1 (constant :consonant)]))
"hello")
#= @[:consonant :vowel :consonant :consonant :vowel]