Function expect

static/plugins/codemirror/mode/javascript/javascript.js:360–367

(wanted)

  poplex.lex = true;

  function expect(wanted) {
    function exp(type) {
      if (type == wanted) return cont();
      else if (wanted == ";" || type == "}" || type == ")" || type == "]") return pass();
      else return cont(exp);
    };
    return exp;
  }

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