On Sunday, December 02, 2012 06:56:02 PM Dirk Bächle wrote:
> Hi Gary,
>
> On 02.12.2012 17:58, Gary Oberbrunner wrote:
> > This looks very interesting. Speed and memory use are two "hot
> > button" issues for many SCons users.
> >
> > What does it do that would break existing projects? Is it the not
> > storing of full paths? (When were slots introduced? 2.2? In that
> > case we're fine on that front.)
>
> all the path attributes for File nodes ("abspath", "labspath" ...) have
> now to be retrieved via functions like "get_abspath()", because they
> might get computed on the fly.
> They usually get accessed directly in old code...and this is also the
> recommended method in all the documents.
Why can't we just turn those path attributes in the File nodes to be
properties? http://docs.python.org/2/library/functions.html#property
>
> This change is the last in line, so it can be easily omitted for a
> start...it brings just a few percent anyway.
>
> Regarding the usage of slots we have to keep the following in mind: it
> makes extending SCons a little bit more difficult. You can't simply slap
> new attributes and functions on a class like SCons.Node anymore, but
> have to subclass it instead.
> Multiple inheritance is not possible anymore for the "slotted"
> classes...so we'd lose some flexibility for SCons as a build system
> framework.
>
> Regards,
>
> Dirk
>
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