Function parseCustomNodes

src/expression/parse.js:1337–1375

* Parse a custom node handler. A node handler can be used to process * nodes in a custom way, for example for handling a plot. * * A handler must be passed as second argument of the parse function. * - must extend math.Node * - must contain a function _compile(defs: Object) : string

(state)

   * @private
   */
  function parseCustomNodes (state) {
    let params = []

    if (state.tokenType === TOKENTYPE.SYMBOL && hasOwnProperty(state.extraNodes, state.token)) {
      const CustomNode = state.extraNodes[state.token]

      getToken(state)

      // parse parameters
      if (state.token === '(') {
        params = []

        openParams(state)
        getToken(state)

        if (state.token !== ')') {
          params.push(parseAssignment(state))

          // parse a list with parameters
          while (state.token === ',') { // eslint-disable-line no-unmodified-loop-condition
            getToken(state)
            params.push(parseAssignment(state))
          }
        }

        if (state.token !== ')') {
          throw createSyntaxError(state, 'Parenthesis ) expected')
        }
        closeParams(state)
        getToken(state)
      }

      // create a new custom node
      // noinspection JSValidateTypes
      return new CustomNode(params)
    }

    return parseSymbol(state)
  }

  /**
   * parse symbols: functions, variables, constants, units