[racket] Is there anything like a "~seq-no-order" pattern for syntax/parse ?

If you don't want to allow ellipses, this will work:
(~seq-no-order _pats ...) == (~seq (~or (~once _pats) ...))

Here _pats and ... are meta, not part of the syntax-parse syntax.

If you do want ellipses, then you'll have to do some parsing yourself to determine which patterns shouldn't be wrapped in ~once. However, you have to use someone's experimental syntax-parse branch that has support for "pattern expanders."
-Ian
----- Original Message -----
From: "Alexander D. Knauth" <alexander at knauth.org>
To: "racket users list" <users at racket-lang.org>
Sent: Sunday, July 20, 2014 5:23:42 PM GMT -05:00 US/Canada Eastern
Subject: [racket] Is there anything like a "~seq-no-order" pattern for syntax/parse ?

Is there anything like a "~seq-no-order" pattern for syntax/parse ?

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