==, is

[Ellery Newcomer]

parser definitely does it for !in, but it doesn't for the other ones, 
and I didn't want to go digging all over the place for it.

Also, spec says yes for !in, but is silent for the other ones

On 11/15/2010 01:08 PM, Steven Schveighoffer wrote:
> On Mon, 15 Nov 2010 14:06:34 -0500, Ellery Newcomer
> <ellery-newcomer at utulsa.edu> wrote:
>
>> quick question: are the following rewrites always valid:
>>
>> e1 != e2 -> !(e1 == e2)
>> e1 !is e2 -> !(e1 is e2)
>> e1 !in e2 -> !(e1 in e2)
>
> I believe this is in fact what the compiler does (rewriting).
>
> -Steve