Function expect

src/cm/javascript.js:237–243

(wanted)

  poplex.lex = true;

  function expect(wanted) {
    return function expecting(type) {
      if (type == wanted) return cont();
      else if (wanted == ";") return pass();
      else return cont(arguments.callee);
    };
  }

  function statement(type) {
    if (type == "var") return cont(pushlex("vardef"), vardef1, expect(";"), poplex);