From: Stefan Monnier <monnier@iro.umontreal.ca>
To: emacs-devel@gnu.org
Subject: Re: User-defined record types, v2
Date: Sat, 18 Mar 2017 18:24:34 -0400 [thread overview]
Message-ID: <jwvefxufcyz.fsf-monnier+gmane.emacs.devel@gnu.org> (raw)
In-Reply-To: 8637eatm6f.fsf@molnjunk.nocrew.org
>>> +INLINE void
>>> +CHECK_RECORD_TYPE (Lisp_Object x)
>>> +{
>>> + /* CHECK_SYMBOL (x); */
>>> +}
>>
>> ???
> This is still a work in progress. I initially added this function to
> check everywhere that the first slot is a valid defstruct type name.
> But then Stefan Monnier added support for EIEIO instances and made the
> first slot be a class object.
Right. Currently the TYPE should be either a symbol (i.e. a "type
name"), or a `record` (a "type descriptor" aka "class") whose first
field (i.e. (aref type 1)) is a symbol.
But I'm not even sure we should enforce this in the `record` and
`make-record` primitives. After all, it's not needed for safety.
And since we allow (aset <obj> 0 <foo>) we can circumvent this
check anyway.
Stefan
PS: Of the two possible TYPEs, the `symbol' case is the least efficient,
so it'd be good to get rid of it, but the `record` case has an obvious
bootstrap problem if we force the TYPE to be a `record`.
next prev parent reply other threads:[~2017-03-18 22:24 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-18 17:04 User-defined record types, v2 Lars Brinkhoff
2017-03-18 17:05 ` Lars Brinkhoff
2017-03-18 17:13 ` Lars Brinkhoff
2017-03-18 17:17 ` Lars Brinkhoff
2017-03-18 17:21 ` Lars Brinkhoff
2017-03-18 17:35 ` Eli Zaretskii
2017-03-18 19:33 ` Lars Brinkhoff
2017-03-18 22:24 ` Stefan Monnier [this message]
2017-03-19 9:17 ` Lars Brinkhoff
2017-03-19 12:50 ` Stefan Monnier
2017-03-19 14:51 ` Eli Zaretskii
2017-03-18 17:29 ` Eli Zaretskii
2017-03-19 10:28 ` Lars Brinkhoff
2017-03-19 12:51 ` Stefan Monnier
2017-03-21 9:55 ` Lars Brinkhoff
2017-03-21 11:53 ` Stefan Monnier
2017-03-22 21:15 ` Stefan Monnier
2017-03-23 6:53 ` Lars Brinkhoff
2017-03-23 7:02 ` Lars Brinkhoff
2017-03-23 7:34 ` Lars Brinkhoff
2017-03-23 19:47 ` Stefan Monnier
2017-03-24 10:15 ` Lars Brinkhoff
2017-03-24 18:17 ` Stefan Monnier
2017-03-24 20:38 ` Lars Brinkhoff
2017-03-29 12:46 ` Lars Brinkhoff
2017-03-30 12:59 ` Stefan Monnier
2017-03-30 14:57 ` Lars Brinkhoff
2017-03-30 15:07 ` Stefan Monnier
2017-03-30 18:10 ` Eli Zaretskii
2017-03-22 7:58 ` Lars Brinkhoff
2017-03-22 8:46 ` Andreas Schwab
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