Comments (4)
Hm, this one might be a little tricky. Should (e (e x ...) ...)
also be accepted because it is transcribeable by duplicating the interior e
for each x
? I suppose so, and the case with a literal list
is sort of the trivial case of that (just to check my understanding, you're looking for terms like (list (list a b c) (list x y z)
, right?). Maybe the solution is to only check names that get imported (eventually, this should be relaxed to allow (m1 x (e #:refers-to x) ...)
, once the system can handle that).
I'm worried that this error message is covering an implementation gap: the binding forms runtime has its own implementation of ...
s, and it might be unable to deal with the case where a ...
ed name "bottoms out" and needs to be duplicated. If that's so, it'll take a bit of work, but it shouldn't need a major overhaul.
from redex.
I'm not sure of that case, but certainly the current error message is incorrect because list
is not a name
. So for fixing this issue, maybe just taking the literals in the grammar into account?
from redex.
I think it might not be too much harder to be more generous (and might be easier, since it might require less plumbing). I think that (assuming the runtime handles ...
correctly, which is reasonably likely), the rule can be: if x
appears in a beta, it must be under exactly n ...
s (it doesn't matter whether the ...
s are part of the beta or not), where n is the smallest number of ...
s that x
appears under as a "normal" pattern part (because that's the "native" transcription depth).
from redex.
That rule is, I think, slightly more generous than the rule that term
uses (term's implementation is inherited from syntax
(which has been refactored into the datum
library))
from redex.
Related Issues (20)
- Defining mutually recursvie judgments/meta-functions HOT 2
- Feature request: tag-with-names for apply-reduction-relation* HOT 2
- test-->>∃ #:steps n passes test if n > than the number of actual reduction steps for a term. HOT 4
- `traces` doesn't draw arrows after "fix layout" HOT 5
- `stepper` doesn't display whole term... unless I *narrow* its box?
- Feature Request: `stepper` with judgment-form use rule names
- Feature request: adjust font for `stepper` HOT 3
- Redex rejects literals at different ellipsis depths in binding form declarations HOT 1
- Generating random expressions sometimes results in an infinite loop
- where/error failures give no information about source of error HOT 6
- where/error failures don't tell you what failed to match
- using judgment-holds within define-relation HOT 1
- Redex's reduction graph windows sneakily hide part of term reductions HOT 1
- where/error doesn't report errors sometimes HOT 8
- define-metafunction does not check type signature on LHS HOT 3
- Docs missing a word I can't fill in. HOT 1
- `derivation/ps` always causes an error by calling a non-existent method HOT 1
- Default rendering font changed between Racket v8.8 and v8.9? HOT 4
- Redex PDF output contains a wrong font, while Racket REPL renders the correct font HOT 2
- Reduce space between rendered rules of a judgement form HOT 3
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from redex.