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Re: Proposal: initial type annotation in SV

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Steffen Mueller
May 6, 2013 05:10
Re: Proposal: initial type annotation in SV
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On 05/05/2013 11:45 PM, Sébastien Aperghis-Tramoni wrote:
> Now, did I miss something so blindingly obvious that I didn't see why
> it cannot work? is it silly?
> Thanks in advance for your comments and critics.
> In the mean time, I'll try to write a proof of concept.

I'm not sure that what you want to do is possible, but I'd sure love to 
see you try since it's been a sore spot wrt. Sereal[1] since the beginning.

Before you start prototyping, I would strongly suggest that you look up 
Chip's emails and branches/patches such as "chip/magicflags7". He'd 
worked towards the same goal: Being able to tell whatever type a scalar 
originated as. I even did some CPAN smoking then and there wasn't too 
much breakage.

Chip, what was the ultimate reason why your changes never made it to blead?

Best regards,

[1] Sereal could do quite a bit better than it does already. Right now, 
it defensively uses the biggest type a scalar currently holds. Which is 
not only space inefficient, but also occasionally wrong. I played with 
improved heuristics (erring on the side of safety but getting the most 
effective type where possible). Not only did that melt my brain, I ran 
out of time and ditched the branch. Patches welcome, for real.

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