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package scala.reflect
package api
/** This trait provides type tag <-> manifest interoperability.
* @groupname TagInterop TypeTag and Manifest Interoperability
*/
trait TagInterop { self: Universe =>
// TODO `mirror` parameters are now of type `Any`, because I can't make these path-dependent types work
// if you're brave enough, replace `Any` with `Mirror`, recompile and run interop_typetags_are_manifests.scala
/**
* Convert a [[scala.reflect.api.TypeTags#TypeTag]] to a [[scala.reflect.Manifest]].
*
* Compiler usually generates these conversions automatically, when a type tag for a type `T` is in scope,
* and an implicit of type `Manifest[T]` is requested, but this method can also be called manually.
* For example:
* {{{
* typeTagToManifest(scala.reflect.runtime.currentMirror, implicitly[TypeTag[String]])
* }}}
* @group TagInterop
*/
def typeTagToManifest[T: ClassTag](mirror: Any, tag: Universe#TypeTag[T]): Manifest[T] =
throw new UnsupportedOperationException("This universe does not support tag -> manifest conversions. Use a JavaUniverse, e.g. the scala.reflect.runtime.universe.")
/**
* Convert a [[scala.reflect.Manifest]] to a [[scala.reflect.api.TypeTags#TypeTag]].
*
* Compiler usually generates these conversions automatically, when a manifest for a type `T` is in scope,
* and an implicit of type `TypeTag[T]` is requested, but this method can also be called manually.
* For example:
* {{{
* manifestToTypeTag(scala.reflect.runtime.currentMirror, implicitly[Manifest[String]])
* }}}
* @group TagInterop
*/
def manifestToTypeTag[T](mirror: Any, manifest: Manifest[T]): Universe#TypeTag[T] =
throw new UnsupportedOperationException("This universe does not support manifest -> tag conversions. Use a JavaUniverse, e.g. the scala.reflect.runtime.universe.")
}
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