Function chain

static/editor.md/lib/codemirror/mode/mirc/mirc.js:86–89

(stream, state, f)

  var functions = parseWords("if elseif else and not or eq ne in ni for foreach while switch");
  var isOperatorChar = /[+\-*&%=<>!?^\/\|]/;
  function chain(stream, state, f) {
    state.tokenize = f;
    return f(stream, state);
  }
  function tokenBase(stream, state) {
    var beforeParams = state.beforeParams;
    state.beforeParams = false;