Eliminating assignments and variable syntax (accessors)

Lex Spoon lex at cc.gatech.edu
Wed Aug 11 05:08:17 UTC 1999

Stefan Matthias Aust <sma at netsurf.de> wrote:
> [Indentation as statement continuation]
> >There is the remaining problem of blocks.  Maybe allow blocks with 
> >one statement to be inlined, and force blocks with multiple statements 
> >to have a line per statement?
> I don't see problems for a parser here.  When it detects a [, it knows that
> it has to look for a ].  You can both write the block in one line or in the
> next line - even not indented as the parser knows that there's still
> something missing. Now if the block contains more than one statement, you
> have to insert new lines.  
> A statement like
> true ifTrue: [false]
> would be possible as for example
> true
>   ifTrue: [false]
> or even
> true
>   ifTrue:
>     [false]

Okay, but it doesn't seem fully in the spirit of syntax-via-indentation.  After all, one of the main places python uses indentation is to note the start and end of a block, right?

So it might be cool to be able to do something like this:

			y := y + 1
			z := z + 1

But this doesn't look perfect, either--it takes 5 lines when 3 or even 1 would do.  So, maybe allow the [ ] syntax for blocks that are only one statement long?

	x < 3
		ifTrue: [ y := y + 1 ]
			z := z + 1.
			m := m * m.


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