(Probably. Why are we whispering?)
Anyway, it occurred to me that I need to provide a more robust way to
generate code for literal arrays anyway. Keywords are more easily
preserved by macros than syntax properties:
(array (array-row 0 1 2 3))
I think that'll let me use Eli's sneaky eval:alts to display (array [0 1
2 3]) but evaluate (array (array-row 0 1 2 3)).
Neil ⊥
On 11/18/2012 08:12 PM, Matthias Felleisen wrote:
(Perhaps this suggests a problem with making a macro depend on the shape of
parens around a sub-expression.)
On Nov 18, 2012, at 10:01 PM, Neil Toronto wrote:
I'm writing the documentation for math/array, and the examples all fail. Here's
a simple one:
@examples[#:eval untyped-eval
(array [0 1 2 3])]
The evaluator raises this error:
application: not a procedure;
expected a procedure that can be applied to arguments
given: 0
arguments...:
1
2
3
The problem here is that the `array' macro is sensitive to square brackets, but
Scribble doesn't preserve the 'paren-shape syntax property. (Either that, or
`examples' only sends lists to the evaluator, not syntax.) So (array [0 1 2 3])
gets evaluated as (array (0 1 2 3)), which looks like a zero-dimensional array
containing (0 1 2 3), which is an application of the value `0'. Bad.
I know this can work just fine; for example, this does the expected thing in
the REPL:
> (eval #'(require math))
> (eval #'(array [0 1 2 3]))
(array [0 1 2 3])
Is there a way to get Scribble to behave like I expect?
Neil ⊥
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