Re: Pseudovectors initialization

[Dmitry Antipov]

On 06/27/2012 09:04 PM, Dan Nicolaescu wrote:

> Is removing this, or removing anything that is set to Qnil safe?
> It might be from case to case, but it's not obvious...

It's verified to be safe for windows, frames, processes and terminals.
ALLOCATE_PSEUDOVECTOR evaluates how many Lisp_Objects are located
after vectorlike_header, and then calls allocate_pseudovector to
initialize all of them to Qnil. Next, allocate_{window,frame,process,
terminal} zeroes the rest. Thus, you need to initialize Lisp_Object
slot only if it should be non-nil and other slot only if it should
be non-zero.

Dmitry