On Mon, Dec 15, 2008 at 6:59 PM, Leon Timmermans <faw...@gmail.com> wrote:
> On Mon, Dec 15, 2008 at 6:42 PM, jason switzer <jswit...@gmail.com> wrote:
> > It's lazy and kinda cheating, but for small simple tasks, it gets the job
> > done. I'm not up to speed with the IO spec, but a sort of auto-slurp
> > functionality would be nice. Something to the effect:
> >
> > @data = :slurp("mydatafile.txt");
>
> A slurp() function has been specced to slurp a file into a string, as
> well as a lines() function that does the same into an array of lines.
>
Okay, that's good to know.
> You didn't get the point of my Roles idea. It should not be added to a
> role File, but to the Role Nameable, which would be composed into
> whatever implements file filehandles, but for example also into Unix
> sockets. IMNSHO interfaces and implementation should be kept separate
> to maintain a proper abstraction level.
>
I hadn't seen a Nameable role mentioned yet, so I wasn't able to understand
any such concept. That is a good idea, but the idea is so general that
anything can be nameable and thus the specificity of the role could quickly
become lost. I was suggesting specific naming functionalities be added to
the File role. If you want to abstract that, that's fine, but beware that
something like Nameable can be too broad of a role (maybe just IONameable?).
> You can already easily mix it in using 'does':
>
> $fstab = open('/etc/fstab', :r);
> $fstab does WhitespaceTrim;
>
> I don't think it's really necessary to include that into open(),
> though it might be useful syntactic sugar.
I haven't spent the time to understand mix-ins yet, but this does look like
a feasible (clean) idea. However, how do you specify one/more filters? For
example, say you want to :rw a file. How can you provide an input filter and
an output filter (or multiples of either)? Can you layer filters if done
with mix-ins? If so, how do you specify direction?
-Jason "s1n" Switzer
