[Typescript] Default props from defaults when destructuring

The defaults work fine from the static .defaultProps property like ...

interface Props {
  foo?: string;
}

const Test: React.SFC<Props> = (props: Props) => {
  const { foo, ...rest } = props;

  return (
    <div { ...rest } />
  );
}

Test.defaultProps = {
  foo: 'bar',
};

export default Test;

I'm wondering if you think it would be possible to get default prop values from the defaults when destructuring during the render? like ...

interface Props {
  foo?: string;
}

const Test: React.SFC<Props> = (props: Props) => {
  const { foo = 'bar', ...rest } = props;

   return (
    <div { ...rest } />
  );
};

export default Test;

No files, tests, or entry points are named in the issue. Start by locating the TypeScript and React prop/defaultProps handling, then determine whether destructuring can use defaults from static defaultProps; done means the documented example behaves as requested and is covered by a test.