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Named parameters
- thing(kind=fish, count=5, size=0.25, colour=red, style=speckled)
- thing = -"thing", options? .
- @kind = -"kind", -"=", ("fish"|"octopus"|"jellyfish"|"ship") .
- -options = -"(", option++(-",", s?),-")" .
- -option = kind | count | colour | size | styling .
- @count = -"count", -"=", integer .
- @colour = -"colour", -"=", name .
- @size = -"size", -"=", number .
- @styling = -"style", -"=", ("speckled" | "crosshatched") .