Uses for unary + (was Re: New Python language abuse: ++x with bytecodehacks)

[Jeff Epler]

On Thu, 8 Jul 1999 15:35:05 GMT, Christian Tismer
 <tismer at appliedbiometrics.com> wrote:
>p.s.: I wondered why Guido didn't optimize a double
>unary positive. But he can't, since he has no idea what
>this operator does.

Because nobody has a reason to type it?

I also overloaded the meaning of unary + when I was working with classes
that acted like numeric types.  ref[:] is a nice way to do a shallow copy
of sequence types, and "+ref" is a nice way to denote a shallow copy of a
numeric type.  (You just have to write the method __pos__ to do so)

Jeff
PS Too bad that dictionaries don't support dict[:] to make a copy too!
-- 
\/ http://incolor.inetnebr.com/jepler/           Jeff Epler jepler at inetnebr.com
"But I don't like Spam!!!!"