On Tue, 11 Jul 2000, Jeremy Hylton wrote:
> If we end up calling this new feature list comprehensions, we might
> create the expectation that they behave like list comprehensions in
> other languages.
Good point.
> >[ f x | x <- xs ]
[...]
> >[ (x,y) | x <- xs, y <- ys ]
The closest translations for these i can imagine are
[ f(x), for x in xs ]
[ (x,y), for x in xs, for y in ys ]
I'd say the above has to be about my favourite for ease of reading.
I think the following grammar would work:
listmaker: test [',' (list_iter | [test (',' test)* [',']])]
list_iter: list_for | list_if
list_for: 'for' exprlist 'in' testlist [',' list_iter]
list_if: 'if' test [',' list_iter]
-- ?!ng
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