On 02/01/2013 03:29 PM, Asumu Takikawa wrote:
Hi all,
I've found that when using racket/class, one syntactic pain point I keep
encountering is that the instantiation is clumsy. This is especially
true if I want to mix different styles of instantiation (keyword and
positional).
Is there any reason to not make the instantiation syntax of `new` more
flexible? I most prefer `new` since it's the shortest and also most
familiar of the three (the others being `make-object` and
`instantiate`).
In particular, I'm imagining the following syntax:
(new c% 1 2 3) => (instantiate c% (1 2 3))
(new c% [x 1] [y 2]) => (instantiate c% [x 1] [y 2])
I think you mean (instantiate c% () [x 1] [y 2]).
(new c% [z 3] 1 2) => (instantiate c% (1 2) [z 3])
(new c% 1 [z 3] 2) => (instantiate c% (1 2) [z 3])
and so on. Attached is a patch that implements this (modulo tests &
docs). Any thoughts?
It's ambiguous:
(new c% (x y))
could mean "pass y for initialization argument x" or "pass (x y) as the
first positional argument".
Ryan
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