Alan Manuel Gloria:
> We also have to be extra-careful here: ! is whitespace only in
> sweet-expressions. Here's another failing counterexample:
>
> define foo(x y)
> ! #|Okay, so this line
> ! does one thing
> ! |#
> ! do-one-thing x y
>
> The above example fails because neoteric does *not* treat ! as whitespace.
True, but as you noted, ;-comments solve the problem nicely:
define foo(x y)
; ! Okay, so this line
; ! does one thing
; !
! do-one-thing x y
I think ;-comments become far more useful when indentation is semantically
meaningful; it's now a lot easier to find where an expression begins and ends.
Also, we already have a similar issue with {...} and !, since this doesn't work
either:
; BAD:
define foo(x y)
! calculate { a +
! b}
! do-one-thing x y
The modified # semantics I'm proposing would make the example above "not work",
but it would be clearly *defined* as "not working". Furthermore, users of
#|...|# at the top level (outside an expression) or within a line would see no
change at all:
#| Comments...
#|
define ...
define x #| comments... |# 5
I think that the handling of #|...|# in the other cases is really an edge case;
few people will notice all they complicated gyrations we go through to make
that work.
--- David A. Wheeler
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