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Last active Dec 26, 2015
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(ns stuff
(:require [instaparse.core :as insta]
[clojure.walk :as walk]))
(defn hiccup->sexp [sym-ns data]
(let [sym-ns-fn #(symbol sym-ns %)]
(walk/postwalk (fn [x] (if (and (vector? x) (keyword? (first x)))
(conj (rest x) (-> x first name sym-ns-fn))
(defn run-lang [lang-n grammar s]
(let [parse-lang (if (ifn? grammar)
(insta/parser grammar))]
(eval (hiccup->sexp lang-n (parse-lang s)))))
(defn register-lang
([grammar] (register-lang *ns* grammar))
([lang-ns grammar]
(let [lang-n (str lang-ns)]
(set! *data-readers* (assoc *data-readers*
(symbol "custom" lang-n)
(partial run-lang lang-n (insta/parser grammar)))))))
(ns lang1
(:require [clojure.string :as string]))
(defn question [value] (str value " GET BACK TO WORK!"))
(defn statement [value] (str (string/upper-case value) "!?!"))
(stuff/register-lang "question = <'what'> <' '+> statement <' '*> <'?'>
statement = #'[a-z\\s]+[a-z]'")
#custom/lang1 "what about this?" ;; => "ABOUT THIS!?! GET BACK TO WORK!"
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