On 01/12/2009 14:27, Ian Lynagh wrote:
On Tue, Dec 01, 2009 at 09:14:22AM +0000, Simon Marlow wrote:
So I think the layout rule should read something like
A layout context can be closed by either
(a) a token indented less than the current indentation level
(b) a closing bracket that matches an open bracket outside the
current layout context
where the set of brackets applying to (b) are (), [], {}, and let..in.
And if/then, then/else?
There are lots more things you could consider as brackets, I erred on
the side of simplicity here. Not only if/then/else, but also case/of,
and if we really wanted to be silly we could start adding things like |
.. = (with commas, for pattern guards). But I think if the new rule is
going to be enough of an improvement, it really has to stick to having
only a few obvious ways to close a layout context.
What I don't know is whether people will accept the new rule in
practice. It's hard to remove a feature purely on the grounds of
complexity, when the complexity doesn't bite that many people (Duncan
already made this point, I think we could expect similar views from others).
Cheers,
Simon
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