Function parse

06.Router/basic/js/vue.js:2627–2713

* Parse a string path into an array of segments * * @param {String} path * @return {Array|undefined}

(path)

   */

  function parse(path) {
    var keys = [];
    var index = -1;
    var mode = BEFORE_PATH;
    var subPathDepth = 0;
    var c, newChar, key, type, transition, action, typeMap;

    var actions = [];

    actions[PUSH] = function () {
      if (key !== undefined) {
        keys.push(key);
        key = undefined;
      }
    };

    actions[APPEND] = function () {
      if (key === undefined) {
        key = newChar;
      } else {
        key += newChar;
      }
    };

    actions[INC_SUB_PATH_DEPTH] = function () {
      actions[APPEND]();
      subPathDepth++;
    };

    actions[PUSH_SUB_PATH] = function () {
      if (subPathDepth > 0) {
        subPathDepth--;
        mode = IN_SUB_PATH;
        actions[APPEND]();
      } else {
        subPathDepth = 0;
        key = formatSubPath(key);
        if (key === false) {
          return false;
        } else {
          actions[PUSH]();
        }
      }
    };

    function maybeUnescapeQuote() {
      var nextChar = path[index + 1];
      if (mode === IN_SINGLE_QUOTE && nextChar === "'" || mode === IN_DOUBLE_QUOTE && nextChar === '"') {
        index++;
        newChar = '\\' + nextChar;
        actions[APPEND]();
        return true;
      }
    }

    while (mode != null) {
      index++;
      c = path[index];