clojure - How can one achieve introspection in mustache template engine? -

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(def template "{{name}}.{{surname}}   {{#data}}     * {{.}}   {{/data}}")  (introspect template) => {:name "" :surname "" :data []}

is there introspect implementation?

if question how build introspect function, instaparse 1 way go:

(require '[instaparse.core :as insta])  (def parse   (insta/parser     "<moustache> = (tagged-block / word / sp)*      <tagged-block> = comment | section | var      comment = <tag-open> <'!'> (word | sp)* <tag-close>      section = section-block-open (current-item / var / comment / word / sp)* <section-block-close>      <section-block-open> = <tag-open> <'#'> name <tag-close>      section-block-close = tag-open '/' name tag-close      var = <tag-open> name <tag-close>      current-item  = <tag-open> <'.'> <tag-close>      <word> = #'[^\\s{}]+'      <sp> = #'[\\s]+'       name = #'[^\\s{}]+'      tag-open = '{{'      tag-close = '}}'"))  (def template "{{name}}.{{surname}}   {{#data}}   * {{.}}   {{/data}}")  (parse template) ;=> ([:var [:name "name"]] "." [:var [:name "surname"]] "\n  " [:var [:name "#data"]] "\n  " "*" " " [:var [:name "."]] "\n  " [:var [:name "/data"]])  (defn introspect [parsed]   (->> (tree-seq sequential? seq parsed)        (filter sequential?)        (filter #(#{:var :section} (first %)))        (map (juxt first (comp keyword last second)))        (map #(case (first %)                :var [(second %) ""]                :section [(second %) []]))        (into {})))  (assert (= {:name "" :surname "" :data []}            (introspect (parse template))))

i included support comments, other mustache constructs should easy add:

(parse "hello {{people}}!! {{! people world!!}}") ;=> ("hello" " " [:var [:name "people"]] "!!" " " [:comment " " "people" " " "could" " " "be" " " "the" " " "world!!"])

it doesn't cover entire moustache grammar, it's start think.


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