[plt-scheme] need examples on some macro patterns
Hi,
When I was reading 11.1 of plt scheme reference, I can't understand the
patterns below
| #(pattern ...) | #(pattern ... pattern ellipses pattern ...) | #s(
key-datum pattern ...) | #s(key-datum pattern ... pattern ellipses pattern
...)
I tried to find some examples about these on google but I failed.
Can someone give me some example on these patterns?
Thanks a lot
Huying
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