parcera

Grammar-based Clojure(script) parser.

Parcera can safely read any Clojure file without any code evaluation.

Parcera uses the wonderful Instaparse as its parsing engine and focuses entirely on the grammar definition instead. For a full explanation of the options available for a parser please visit Instaparse website.

usage

(ns example.core
  (:require [parcera.core :as parcera]
            [instaparse.core :as instaparse]))

;;parse clojure code from a string
(parcera/clojure (str '(ns parcera.core
                         (:require [instaparse.core :as instaparse]
                                   [clojure.data :as data]
                                   [clojure.string :as str]))))

;; => returns a data structure with the result from the parser
[:code
 [:list
  [:symbol "ns"]
  [:whitespace " "]
  [:symbol "parcera.core"]
  [:whitespace " "]
  [:list
   [:simple-keyword "require"]
   [:whitespace " "]
   [:vector
    [:symbol "instaparse.core"]
    [:whitespace " "]
    [:simple-keyword "as"]
    [:whitespace " "]
    [:symbol "instaparse"]]
   [:whitespace " "]
   [:vector [:symbol "clojure.data"] [:whitespace " "] [:simple-keyword "as"] [:whitespace " "] [:symbol "data"]]
   [:whitespace " "]
   [:vector [:symbol "clojure.string"] [:whitespace " "] [:simple-keyword "as"] [:whitespace " "] [:symbol "str"]]]]]

;; convert an AST back into a string
(parcera/code [:symbol "ns"])
;; "ns"