From: Jean-Hugues ROBERT <jean_hugues_robert@...>
Date: 2004-05-01T05:37:55+09:00
Subject: Re: def [](v) xx; return yy; end # returned value is ignored !?

At 02:56 01/05/2004 +0900, you wrote:

>On Apr 30, 2004, at 9:12 AM, Jean-Hugues ROBERT wrote:
>
>>Am I missing something ?
>
>Short answer: assignment always returns the value assigned, regardless of 
>the return value of the function assigned to.

OK. I guess I have to accept that.

>If you REALLY need to get around this, try:
>
>   Test.new.send(:[]=, "hello")
>
>This eliminates the actual assignment, and treats it as a simple method 
>call. The return value is respected.

OK. Thanks.

I actually don't want to avoid the actual assignment, I want to
control what get assigned.

This send() gets rid of the syntax sugar of the compiler where
(x[y]=z)
becomes
(tmp = z, x.[]=( y, tmp), tmp)

If compiler/language was to assume that .[]= does what it is supposed
to do and knows what it does, it would save some CPU cycles.

Many thanks,

Yours,

Jean-Hugues


>HTH,
>--Mark

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