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(.module:
[library
[lux (#- Type)
[abstract
[equivalence (#+ Equivalence)]
[order (#+ Order)]
[hash (#+ Hash)]]
[data
["." product]
["." text ("#\." order)
["%" format (#+ format)]]]]]
["." // #_
["#" artifact (#+ Artifact) ("#\." order)
[type (#+ Type)]]])
(type: #export Dependency
{#artifact Artifact
#type Type})
(def: #export hash
(Hash Dependency)
($_ product.hash
//.hash
text.hash
))
(def: #export equivalence
(Equivalence Dependency)
(\ hash &equivalence))
(implementation: #export order
(Order Dependency)
(def: &equivalence
..equivalence)
(def: (< reference subject)
(<| (or (//\< (get@ #artifact reference)
(get@ #artifact subject)))
(and (//\= (get@ #artifact reference)
(get@ #artifact subject)))
(text\< (get@ #type reference)
(get@ #type subject)))))
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