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Brandon Benvie (2013-08-09T23:21:00.000Z)
On 8/9/2013 4:03 PM, Allen Wirfs-Brock wrote:
> const MUST = () => {throw TypeError("Missing required parameter"};
>
> function foo (a=MUST(), b, c) {...}

But that doesn't work for:

```js
function foo({ a } = { a: MUST() }){}
foo({}); // doesn't throw

function bar({ +a }){}
bar({}); // would throw
```
domenic at domenicdenicola.com (2013-08-23T13:42:33.395Z)
On 8/9/2013 4:03 PM, Allen Wirfs-Brock wrote:
> ```js
> const MUST = () => {throw TypeError("Missing required parameter"};
>
> function foo (a=MUST(), b, c) {...}
> ```

But that doesn't work for:

```js
function foo({ a } = { a: MUST() }){}
foo({}); // doesn't throw

function bar({ +a }){}
bar({}); // would throw
```
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