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|
(.module:
[lux (#- Name Type)
[abstract
[equivalence (#+ Equivalence)]
[monad (#+ do)]]
[control
["<>" parser
["<.>" xml (#+ Parser)]
["<.>" text]]]
[data
["." sum]
[format
["." xml (#+ XML)]]]]
["." / #_
["#." stamp (#+ Stamp)]])
(type: #export Snapshot
#Local
(#Remote Stamp))
(implementation: any_equivalence
(Equivalence Any)
(def: (= _ _)
true))
(def: #export equivalence
(Equivalence Snapshot)
($_ sum.equivalence
..any_equivalence
/stamp.equivalence
))
(template [<definition> <tag>]
[(def: <definition> xml.Tag ["" <tag>])]
[<local_copy> "localCopy"]
[<snapshot> "snapshot"]
)
(def: local_copy_value
"true")
(def: local_copy_format
XML
(#xml.Node <local_copy>
xml.attributes
(list (#xml.Text ..local_copy_value))))
(def: local_copy_parser
(Parser Any)
(do <>.monad
[_ (<xml>.node ..<local_copy>)]
(<xml>.children (<text>.embed (<text>.this ..local_copy_value)
<xml>.text))))
(def: #export (format snapshot)
(-> Snapshot XML)
(<| (#xml.Node ..<snapshot> xml.attributes)
(case snapshot
#Local
(list ..local_copy_format)
(#Remote stamp)
(/stamp.format stamp))))
(def: #export parser
(Parser Snapshot)
(do <>.monad
[_ (<xml>.node <snapshot>)]
(<xml>.children (<>.or ..local_copy_parser
/stamp.parser))))
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