From: Christian Szegedy <szegedy@...>
Date: 2001-05-16T02:24:02+09:00
Subject: [ruby-talk:15192] Re: operator idea


Dave wrote:
> Or are you suggesting that x += a should have the same semantics as
> x << a?
>
> I have to admit I'm confused.

Perhaps I am confused:

I thought that the semantics of a+=x a<<x for thing is the same,
only their implementations differ. Do I miss something?

> So are you suggesting mapping
>
>   x = a + b + c
>
> into
>
>   x = a.dup
>     x += b
>     b += c
> 
> or
>
>  x = a.dup
>    x << b
>    x << c

I said that if the + operator would be derived from the += operator,
instead of the current way, then it would be much more effective.

So you would define the += operator only, which, in turn, would define
the + operator automatically. Specially for string case: you could
implement += exactly the same way the << is implemented now.

Do I miss some something?

Best Regards, Christian