gistfile1.js

function parse(text) { var i = 0

   function expr() { var result = [], t
      while (t = term()) { result.push(t) }
      return result }

   function term() { return paren() || scope() || label() }

   function paren() { var result
      if (whitespace() && character('(') && (result = expr()) && whitespace() && character(')')) {
         return result }
      else {
         return false } }

   function scope() { var result
      if (whitespace() && character('{') && (result = expr()) && whitespace() && character('}')) {
         return result }
      else {
         return false } }

   function label() { var result = ''
      whitespace()
      var result = ''
      while ("(){} ".indexOf(text[i]) === -1 && i < text.length) {
         result = result.concat(text[i]); i++ }
      return result.length > 0 ? result : false }

   function whitespace() { while (text[i] === ' ' && i < text.length) { i++ }; return true }

   function character(c) { if (text [i] === c) { i++; return true } else { return false } }

   return expr()

}