On Thu, Sep 29, 2011 at 3:30 PM, Brendan Eich <[email protected]> wrote:
> The idea is that sealing an object is more common than freezing it, while
> freezing a property is more common than sealing it.
I was thinking freezing an object is more common than sealing, but #
for freeze, ## for seal looks backwards anyways.
> We don't want # as a prefix for value types.
Agree, but why not for at least Arrays if not Functions and Regexps as well ?
Probably shouldn't have <| for value types either then right ?
>> Compose with <|:
>>
>> null <| ##{...} // record-esque
>> null <| ##[...] // tuple-esque
>
> These are too long if common, they want the HoMD single # prefixing.
Agree. I think composition with <| still is needed though for
consistency with non-#-prefixed literals if nothing else.
>> Include tuple-isms for #[], ##[]:
>>
>> holes => syntax error
>> length cannot be greater than 2^32 - 1
>
> Sure, this carries over for all tuple proposals (I assert). But we want
> shorter syntax, no doubled funny chars, no verbose regularity at the expense
> of common cases being relatively overlong.
So if #[] is added as shorthand for a sealed Array, do you agree that
#[0,,1] should be a syntax error ?
Thanks,
Sean Eagan
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