// "->" short for "() ->"
// "Runnable ->" short for "(Runnable) () ->"
// "-> .x" short for "__0 -> __0.x"
svoid tok_shortLambdas(LS tok) {
  jreplace_dyn(tok, "-> .<id>", (_tok, cIdx) -> {
    var var = makeVar();
    ret var + " -> " + var + "." + _tok.get(cIdx+6);
  });
  
  jreplace(tok, "->", "() ->", tokCondition {
    S prev = _get(tok, i-1);
    ret eqOneOf(prev, null, "=", "(", ",", "return", ":", ">");
  });
  
  jreplace(tok, "Runnable ->", "(Runnable) () ->");
}