I'm having trouble with the type structure of Scribble and hoping someone can
help me get this right.
Let's say I want to write content like this:
=====
@exercise{
@question{The expression @code{1 + 2} evaluates to}
@answer{
@itemlist[
@item{@code{2}}
@item{@code{3}}
@item{@code{4}}
]
}
}
=====
That is, an `exercise` contains within it a `question` and an `answer` (and
maybe other parts). Each of those can contain compound content (text, code,
itemlists...). In my (HTML) output I would like each of these to have their own
class tags, so the structure looks like
<div class="exercise">
...
<div class="question">
...
</div>
...
<div class="answer">
...
</div>
...
</div>
I have set up styles as follows:
(define exercise-style (make-style "exercise" null))
(define question-style (make-style "question" null))
(define answer-style (make-style "answer" null))
What I'm trying to do is create the correct form of "pass-through" abstraction
for the `exercise`, `question`, and `answer` functions that just attach the
style and leave everything else alone: e.g.,
(define (exercise . t) (nested-flow exercise-style t))
(define (question . t) (nested #:style question-style t))
I have tried a whole bunch of things (`nested`, `nested-flow`, etc.) and cannot
get anything to work correctly, consistently: each thing I try eventually
results in a contract violation such as
make-nested-flow: contract violation
expected: block?
given: "\n"
TIA,
Shriram
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