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Re: [PATCH] Class as a Feature (take four)

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From:
chromatic
Date:
December 15, 2008 14:38
Subject:
Re: [PATCH] Class as a Feature (take four)
Message ID:
200812151438.09462.chromatic@wgz.org
On Monday 15 December 2008 14:24:17 Rafael Garcia-Suarez wrote:

> Sorry if I come late to this discussion, but what is the grand plan ?
> Surely a lone class keyword is not that useful ? The following has to
> be considered :
>
> * syntax extensions in the class{} block (for example default
> strictures, method keyword...)
> * class attributes (like inheritance, or final-ness à la final classes
> of Java, just to name some examples)
> * a 3rd idea that I haven't seen yet here... define defaults for
> method attributes ? (at BEGIN or CHECK time) Or interact with the
> compilation in one way or another

I think class BLOCK by itself is useful (descriptive and simpler syntax for 
compile-time package scoping and @ISA setting), but it's definitely a 
required feature before even considering at least the first element of your 
list.  Certainly it has more value than the similarly small syntax change of 
allowing 'method where 'sub' is today.

Adding syntax extensions will be a much larger job, as it involves creating a 
new type of block and defining certain syntactic constructs which are only 
valid in the block.  (I couldn't see any easy way to use a literal token in 
the parser where currently you might use the WORD token, for example.)

-- c

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