Label-Value (was: Re: Inheriting the @ sign from Ruby)

[Rainer Deyke]

"Rainer Deyke" <root at rainerdeyke.com> wrote in message
news:rOr_5.31120$x6.15241856 at news2.rdc2.tx.home.com...
> Yes, in-place modification should be supported.  I had something like this
> in mind:
>
> class UserInt:
>   def __init__(self, value):
>     self.data = value
>   def __add__(self, other):
>     if isinstance(other, UserInt):
>       return self.__class__(self.data + other.data)
>     else:
>       return self.__class__(self.data + other)
>   __radd__ = __add__
>   def __iadd__(self, other):
>     if isinstance(other, UserInt):
>       self.data += other.data
>     else:
>       self.data += other
>   # Repeat for all other operations
>
> UserInt as written is more properly UserNumber, since it supports longs
ints
> and floats.

Of course __iadd__ actually belongs in MutableInt instead of UserInt, but
that didn't occur to me until after I'd written it.


--
Rainer Deyke (root at rainerdeyke.com)
Shareware computer games           -           http://rainerdeyke.com
"In ihren Reihen zu stehen heisst unter Feinden zu kaempfen" - Abigor