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Re: [PATCH] Implement SRFI-111 Boxes

From: Ludovic Courtès
Subject: Re: [PATCH] Implement SRFI-111 Boxes
Date: Tue, 25 Mar 2014 21:21:31 +0100
User-agent: Gnus/5.130007 (Ma Gnus v0.7) Emacs/24.3 (gnu/linux)

Andy Wingo <address@hidden> skribis:

> On Tue 25 Mar 2014 18:01, address@hidden (Ludovic Courtès) writes:
>> Tu put it differently, I don’t think it would buy us anything to make
>> variable SRFI-111 boxes.
> Dunno; variables are slightly cheaper than records.  Their type checks
> are easier and they take less memory.  
>> However, it could perhaps break code
> In what way?

‘variable?’ would suddenly match any SRFI-111 box.

>> and would not allow for a separate type printer, which is useful.
> Not sure what this point is, as the external representation was not
> specified in SRFI-111.

I mean this:

  #<variable 15cb830 value: #<procedure + (#:optional _ _ . _)>>


  #<box 206f8c0 value: #<procedure + (#:optional _ _ . _)>>

I find it convenient that variables are distinguished.

> Perhaps we are miscommunicating -- I would change what we currently call
> "variables" to be "boxes".  WDYT?

You mean just the name, or making them SRFI-111 boxes?

Anyway, I don’t feel strongly about this particular point, but I think
we’ve been deprecating a lot lately.


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