cljs-parser

Clojurescript parser

cljs-parser

Clojurescript parser.

If it doesn't work, it's probably because I have no idea what I'm doing. I've never even coded in clojurescript. Help needed and appreciated.

var parser = require("cljs-parser")
  , fs = require("fs")
 
fs.readFile("/path/to/src.cljs", {encoding: "utf8"}, function (erinput) {
  if (er) throw er
  var tree = parser.parse(input)
  // Do something with the tree 
})

It creates a tree structure of nodes that have type, left and right properties. The left and right properties point to other nodes unless the node type is "leaf", in which case it's left property points to a token, which has a type and val property.

For the input file hello.cljs:

(ns hello.core)
 
; Hello World in clojurescript
(defn -main []
  (println "Hello World"))
 
(set! *main-cli-fn* -main)

output:

{
  "type": "list_list",
  "left": {
    "type": "list_list",
    "left": {
      "type": "list",
      "left": {
        "type": "s_exp_list",
        "left": {
          "type": "leaf",
          "left": {
            "type": "symbol",
            "val": "ns"
          },
          "right": null
        },
        "right": {
          "type": "s_exp_list",
          "left": {
            "type": "leaf",
            "left": {
              "type": "symbol",
              "val": "hello.core"
            },
            "right": null
          }
        }
      }
    },
    "right": {
      "type": "list",
      "left": {
        "type": "s_exp_list",
        "left": {
          "type": "leaf",
          "left": {
            "type": "symbol",
            "val": "defn"
          },
          "right": null
        },
        "right": {
          "type": "s_exp_list",
          "left": {
            "type": "leaf",
            "left": {
              "type": "symbol",
              "val": "-main"
            },
            "right": null
          },
          "right": {
            "type": "s_exp_list",
            "left": {
              "type": "vector"
            },
            "right": {
              "type": "s_exp_list",
              "left": {
                "type": "list",
                "left": {
                  "type": "s_exp_list",
                  "left": {
                    "type": "leaf",
                    "left": {
                      "type": "symbol",
                      "val": "println"
                    },
                    "right": null
                  },
                  "right": {
                    "type": "s_exp_list",
                    "left": {
                      "type": "leaf",
                      "left": {
                        "type": "string",
                        "val": "Hello World"
                      },
                      "right": null
                    }
                  }
                }
              }
            }
          }
        }
      }
    }
  },
  "right": {
    "type": "list",
    "left": {
      "type": "s_exp_list",
      "left": {
        "type": "leaf",
        "left": {
          "type": "symbol",
          "val": "set!"
        },
        "right": null
      },
      "right": {
        "type": "s_exp_list",
        "left": {
          "type": "leaf",
          "left": {
            "type": "symbol",
            "val": "*main-cli-fn*"
          },
          "right": null
        },
        "right": {
          "type": "s_exp_list",
          "left": {
            "type": "leaf",
            "left": {
              "type": "symbol",
              "val": "-main"
            },
            "right": null
          }
        }
      }
    }
  }
}