Subject: Re: Feeling the bits between your toes?
From: (Rob Warnock)
Date: Thu, 08 Apr 2004 06:42:59 -0500
Newsgroups: comp.lang.lisp
Message-ID: <>
Cameron MacKinnon  <> wrote:
| I once read a quotation something like "I like Lisp. It lets you feel 
| the bits between your toes."  When I first read it, I thought "huh?", 
| and I haven't had any flashes of enlightenment since.
| Digging for material, I found Drew McDermott on 2003/10/20: "I think I 
| was regretting the demise of the facility in many Lisps that let you 
| coerce a fixnum to a pointer and back again (just like C!). ...

Actually, I'll bet you'll still find such functions under the hoods
of almost all current Common Lisps' FFI facilities. For example, see
CMUCL's ALIEN:SAP-ALIEN and ALIEN:ALIEN-SAP macro/function (resp.):

    SAP-ALIEN converts SAP (a system area pointer see section 6.5)
    to an Alien value with the specified TYPE. TYPE is not evaluated.

    ALIEN-SAP returns the SAP which points to ALIEN-VALUE's data.


Rob Warnock			<>
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