From: "Berger, Daniel" <Daniel.Berger@...>
Date: 2004-12-09T01:59:57+09:00
Subject: Re: Pathname needs a makeover

Tanaka Akira wrote:

>> First of all, Python people discuss various points for a class for
pathname.
>> http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html

> It may be interesting because some points you mention is disscussed.

Definitely looks interesting.  I'll take a look.

>> A pathname is a string.  Therefore, it should be a subclass of String

> No.  Various string operations are not suitable for pathname.

> For example, Pathname.new("a") + Pathname.new("b") is
Pathname.new("a/b"),
> not Pathname.new("ab").

Then you redefine the methods that need it.

> Also I want to distinct a pathname and a content of file.
> For example, my library for HTML, HTree, has HTree.new(arg) method.
> If arg is a string, arg is treated as HTML content.  If arg is a
pathname,
> arg is opened and its content is parsed.

Then, IMHO, you should use duck-typing rather than checking the class
type.

> pathname.open and pathname.read is required for polymorphic to URI.

> If pathname and open-uri is in effect, uri.read and pathname.read can
> be used polymorphically.

I don't follow.  Can you provide an example?

>> - It should make private methods private.

> Acceptable.  List of methods?

It looks like any method with a :nodoc: tag is meant to be private.

Regards,

Dan