> On Fri, Aug 22, 2008 at 12:40 PM, Waldemar Horwat <[EMAIL PROTECTED]> wrote:
>> Brendan Eich wrote:
>>> On Aug 22, 2008, at 7:26 AM, Ingvar von Schoultz wrote:
>>>> While reading up on this, I noticed that you can declare the
>>>> same name with both let and var in the same scope:
>>>>
>>>> var x = 'global';
>>>> let x = 42;
>>>
>>> If these are both within an explicit block, the let will shadow the
>>> hoisted var.
>>
>> This one is bizarre and infrequent enough that I wouldn't mind if we made
>> this into an error -- specifically, you can't write "var x" inside a block
>> that contains a "let x" if that var would hoist to or beyond that let's
>> block.
On Fri, Aug 22, 2008 at 2:04 PM, Mark S. Miller <[EMAIL PROTECTED]> wrote:
> I agree that this should be a static error.
Even this simple cleanup has surprising consequences. If
function() {
...
{
var x = 'global';
let x = 42;
}
}
is a static error, then so should
function() {
...
{
var x = 'global';
const x = 42;
}
}
and
function() {
...
{
var x = 'global';
function x() 42;
}
}
The last of these differs from the current behavior 4/4 existing
browsers. However, I still think it's the right thing, and it is
upwards compatible from ES3 (which prohibits nested named function
declarations).
--
Cheers,
--MarkM
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