Hi,
At Wed, 23 May 2012 12:54:18 -0400 (EDT),
David A Wheeler wrote:
>
> Alpheus Madsen <[email protected]>
> > One thought I've been wanting to experiment with, but haven't had the time
> > to attempt to implement, is to use a double-indent to indicate groups.
>
> I think that's even worse. It's very unreadable. It's also ambiguous for
> the first indent; does "two spaces" mean an indent of two spaces, or a
> double-indent for one-space indenting?
Using double indent had also been my first idea, but I discarded it, because
the meaning of the double indent would not be obvious without the less-indented
line which comes later - it would be ambigous.
example:
(let
((a b)(c d))
(e))
becomes
let
a b
c d
e
Imagine 5 let arguments and you cannot know anymore if it’s double-indented.
Compare
let
.
a b
c d
e
The reason why I chose the . is to avoid adding any new syntax elements. . is
already used to create cons-cels, but it has little use on its own:
(if (equal (. (quote "abc")) (quote "abc")) t)
; this syntax would be invalid with the .-notation.
if
equal
.
quote "abc"
quote "abc"
t
Also I like about the . that it is so small: It is almost like double indent,
but explicit. And it scales:
(a (((((b c))))))
→
a
.
.
.
.
b c
here it is explicit what happens, even though the code is evil.
Best wishes,
Arne
PS: Only answering now, because I we just moved, so I was overloaded for quite
some time.
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