This repository was archived by the owner on May 21, 2018. It is now read-only.
This repository was archived by the owner on May 21, 2018. It is now read-only.
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Description
Xml module is not able to dispatch a valid Extractor from nested structures when the extraction of some middle elements has been customized. The behavior has been observed starting from nested structures greater than three elements. See the next code snippet as an example of this issue:
object RaptureXmlOk {
import rapture.xml._
case class Foo(bar: Bar)
case class Bar(baz: Baz)
case class Baz(qux: Qux)
case class Qux(value: String)
implicitly[Extractor[Bar, Xml]] // works
implicitly[Extractor[Foo, Xml]] // works
}
// REPL
// :paste
// Entering paste mode (ctrl-D to finish)
// CTRL +D
// Exiting paste mode, now interpreting.
// defined object RaptureXmlOk
object RaptureXmlKo {
import rapture.xml._, xmlBackends.stdlib._
case class Foo(bar: Bar)
case class Bar(baz: Baz)
case class Baz(qux: Qux)
object Baz {
// custom extractor in order to be able to extract this:
// xml"""<foo><bar><baz><value>xxx</value></baz></bar></foo>""".as[Foo]
// i.e. without the extra <qux>...</qux>
implicit val bazExtractor: Extractor[Baz, Xml] =
Xml.extractor[Qux].map(Baz(_))
}
case class Qux(value: String)
implicitly[Extractor[Bar, Xml]] // works
implicitly[Extractor[Foo, Xml]] // fails!!!
}
// REPL
// :paste
// Entering paste mode (ctrl-D to finish)
// CTRL +D
// Exiting paste mode, now interpreting.
// <console>:27: error: cannot extract type RaptureXmlKo.Foo from rapture.xml.Xml.
// implicitly[Extractor[Foo, Xml]] // fails!!!Metadata
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