Function chain

static/editor.md/lib/codemirror/mode/pig/pig.js:28–31

(stream, state, f)

  var isOperatorChar = /[*+\-%<>=&?:\/!|]/;

  function chain(stream, state, f) {
    state.tokenize = f;
    return f(stream, state);
  }

  var type;
  function ret(tp, style) {