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patryk-scalac-io/JsonPrism.scala

Created June 15, 2017 06:51
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JsonPrism.scala
// Based directly on definition:
val stringPrism = Prism[Json, String]{
case JStr(v) => Some(v)
case _ => None
}(str => JStr(str))
// The same prism but defined using `partial` helper and succinct syntax for second argument:
val stringPrism = Prism.partial[Json, String]{case JStr(v) => v}(JStr)
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