leverage spork/regex to help transition to using pegs

main.janet

(import spork/regex)

(comment

  (regex/source "a")
  # => "a"

  (regex/source `\s`)
  # => '(set "\n\t\r\v\f ")

  (regex/source `\d`)
  # => '(range "09")
  
  (regex/source "a+")
  # => '(some "a")

  (regex/source "a*")
  # => '(any "a")

  (regex/source "a?")
  # => '(? "a")

  (regex/source "a.")
  # => '(* "a" 1)

  (regex/source "x{3}")
  # => '(repeat 3 "x")

  (regex/source "x{2,8}")
  # => '(between 2 8 "x")

  (regex/source "[0-9]")
  # => '(range "09")

  (regex/source "[0-9a-z]")
  # => '(range "09" "az")

  (regex/source "[elphant]")
  # => '(range "ee" "ll" "pp" "hh" "aa" "nn" "tt")

  (regex/source "[^fox]")
  # => '(if-not (range "ff" "oo" "xx") 1)

  (regex/source "cat|dog|penguin")
  # => '(choice "cat" "dog" "penguin")

  (regex/source "(cat)")
  # => '(capture "cat")

  (regex/source "(?:cat)")
  # => "cat"

  )