Hello,
I've been using Pollen for about 9 months now and have been enjoying it. I
primarily use it to generate LaTeX so that I can write consistently in
pollen and abstract away the different LaTeX templates each conference has.
I've been doing this using the multi-target method described in Tutorial 4
(because, being able to generate an HTML version is nice too). This has
worked pretty well, and I've turned out a few papers, an essay, and a
project proposal doing this.
Recently, I was looking through the TFL pollen.rkt to see if there were any
cool ideas I could borrow. And I saw the detect-list-items function and
corresponding bullet-list tag.
◊bullet-list{
Foo
Bar
Baz
}
I liked this better than explicitly adding all the tags myself (for
example):
◊ul{
◊li{foo}
◊li{bar}
◊li{baz}}
In this case, these ul and li tags more or less pass-through for HTML (li
does a decode paragraph too) and get translated to the LaTeX equivalent.
Both bullet-list as-is and my stew of tags get me the same HTML result, but
I was hoping that I could "evaluate" the result that comes out of the
bullet-list and have it generate the LaTeX, sparing me from creating a new
"detect-list-items" for LaTeX. Something like (forgive novice Racket code):
(define (my-bullet-list . args)
(define results `(bullet-list ,@args))
(define results2 (eval results ns))
(eval results2 ns))
I tried this in the REPL, but got an error "#%app: missing procedure
expression;" So, I suspect I'm "doing it wrong" in more ways than one.
So, I'm wondering if there is some mechanism for evaluating a txexpr in
Pollen? If this is not how it's done, I'm certainly willing to to know the
right way to do this (maybe a hook in decode?). Eval feels a bit risky, but
since it's only my own feet I'm stepping on, I don't mind too much (for
now).
The right way may be that I just "port" my old code over to the
detect-list-items, but I just figured I would ask here as I've run into
this need(?) another time when I was playing with attributes and suddenly
wanted to put a tag in one of them (solved another way).
Best regards,
--
Trenton
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