[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: How to make a new pseudovector type?

From: Stefan Monnier
Subject: Re: How to make a new pseudovector type?
Date: Mon, 18 Jul 2011 10:19:33 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.0.50 (gnu/linux)

>>> In the xwidget branch I use   PVEC_OTHER = 0x400000 from enum pvec_type
>>> to represent an xwidget.
>> Don't: create a new PVEC_XWIDGET instead.
> Cool, but the bitmask is fully utilized. Can I expand the bitmask?

Of course.

> (I need 2 types.) if so, why is it so small to begin with?

It's made as large as needed.  Actually, it largely doesn't need to be
a bitmask.  Last time I looked it's only used at one or two places to
make it marginally quicker to check if something is one of some
particular subset of the possible pseudo-vectors.


reply via email to

[Prev in Thread] Current Thread [Next in Thread]