How can use outline mode in lisp code?

How can use outline mode in lisp code?

[Giannandrea Castaldi]

Hi,
I'm using emacs+slime to write common lisp programs (cmucl).
I'd like to use the outline mode while I'm editing lisp programs. It 
should make invisble/visble the symbolic expressions of my files.
How can I do it?

Thanks.

Giannandrea

Re: How can use outline mode in lisp code?

[Thien-Thi Nguyen]

Giannandrea Castaldi <g.castal@tiscali.it> writes:

> I'm using emacs+slime to write common lisp programs (cmucl).
> I'd like to use the outline mode while I'm editing lisp
> programs.  It should make invisble/visble the symbolic
> expressions of my files.  How can I do it?

i recommend hideshow minor mode because it can handle hiding the
binding block in a let form, whereas outline cannot.  it is also
"block" oriented rather than simply indentation detecting, and
thus handles nested forms better (which is nice for sexp-based
languages (like lisp :-)).  for example, given the form (J and K
signify cursor positions on the line below them):

  J    KL
  (let ((a (list 10
                 20
                 30))
        (b 2)
        (c 3))
    (list a b c))

hs-hide-block at J shows:

  (let ((a (list 10...

hs-hide-block at K shows:

  (let ((a (list 10...
    (list a b c))

hs-hide-block at L shows:

  (let ((a (list 10...
        (b 2)
        (c 3))
    (list a b c))

there are also other facilities i won't spew on about here (see
Commentary in hideshow.el for more info).

the bad news is that currently top-level comments and "internal"
comments are handled differently.  someone needs to generalize
hideshow algorithms so that the former can be implemented as a
special case of the properly-recursive latter.  a bug report to
this effect has been sitting for six months, and will probably sit
for another few, until autumn, at least.  some programmers are at
times extremely slow. :-/

thi

Re: How can use outline mode in lisp code?

[Giannandrea Castaldi]

Thien-Thi Nguyen wrote:
> Giannandrea Castaldi <g.castal@tiscali.it> writes:
> 
> 
>>I'm using emacs+slime to write common lisp programs (cmucl).
>>I'd like to use the outline mode while I'm editing lisp
>>programs.  It should make invisble/visble the symbolic
>>expressions of my files.  How can I do it?
> 
> 
> i recommend hideshow minor mode because it can handle hiding the
> binding block in a let form, whereas outline cannot.  it is also
> "block" oriented rather than simply indentation detecting, and
> thus handles nested forms better (which is nice for sexp-based
> languages (like lisp :-)).  for example, given the form (J and K
> signify cursor positions on the line below them):
> 
>   J    KL
>   (let ((a (list 10
>                  20
>                  30))
>         (b 2)
>         (c 3))
>     (list a b c))
> 
> hs-hide-block at J shows:
> 
>   (let ((a (list 10...
> 
> hs-hide-block at K shows:
> 
>   (let ((a (list 10...
>     (list a b c))
> 
> hs-hide-block at L shows:
> 
>   (let ((a (list 10...
>         (b 2)
>         (c 3))
>     (list a b c))
> 
> there are also other facilities i won't spew on about here (see
> Commentary in hideshow.el for more info).
> 
> the bad news is that currently top-level comments and "internal"
> comments are handled differently.  someone needs to generalize
> hideshow algorithms so that the former can be implemented as a
> special case of the properly-recursive latter.  a bug report to
> this effect has been sitting for six months, and will probably sit
> for another few, until autumn, at least.  some programmers are at
> times extremely slow. :-/
> 
> thi

Very useful, thanks a lot.


Giannandrea