diff options
Diffstat (limited to 'src/library/scala/reflect/base/TypeTags.scala')
| -rw-r--r-- | src/library/scala/reflect/base/TypeTags.scala | 17 |
1 files changed, 4 insertions, 13 deletions
diff --git a/src/library/scala/reflect/base/TypeTags.scala b/src/library/scala/reflect/base/TypeTags.scala index 8d4aa04efc..ed927fd889 100644 --- a/src/library/scala/reflect/base/TypeTags.scala +++ b/src/library/scala/reflect/base/TypeTags.scala @@ -16,16 +16,11 @@ import language.implicitConversions * * === Overview === * - * Type tags are organized in a hierarchy of four classes: - * [[scala.reflect.ArrayTag]], [[scala.reflect.ClassTag]], - * [[scala.reflect.base.Universe#TypeTag]] and [[scala.reflect.base.Universe#ConcreteTypeTag]]. + * Type tags are organized in a hierarchy of three classes: + * [[scala.reflect.ClassTag]], [[scala.reflect.base.Universe#TypeTag]] and [[scala.reflect.base.Universe#ConcreteTypeTag]]. * - * An [[scala.reflect.ArrayTag]] value carries knowledge about how to build an array of elements of type T. - * Typically such operation is performed by storing a runtime class and instantiating arrays via reflection, - * but [[scala.reflect.ArrayTag]] only defines an interface, not an implementation, hence it only contains the factory methods - * `newArray` and `wrap` that can be used to build, correspondingly, single-dimensional and multi-dimensional arrays. - * - * A [[scala.reflect.ClassTag]] is a standard implementation of [[scala.reflect.ArrayTag]]. + * A [[scala.reflect.ClassTag]] carries a runtime class that corresponds to the source type T. + * As of such, it possesses the knowledge about how to build single- and multi-dimensional arrays of elements of that type. * It guarantees that the source type T did not to contain any references to type parameters or abstract types. * [[scala.reflect.ClassTag]] corresponds to a previous notion of [[scala.reflect.ClassManifest]]. * @@ -33,10 +28,6 @@ import language.implicitConversions * A [[scala.reflect.base.Universe#ConcreteTypeTag]] value is a [[scala.reflect.base.Universe#TypeTag]] * that is guaranteed not to contain any references to type parameters or abstract types. * - * It is recommended to use the tag supertypes of to precisely express your intent, i.e.: - * use ArrayTag when you just want to construct arrays, - * use ClassTag only when you need a runtime class, e.g. for serialization or pattern matching. - * * [Eugene++] also mention sensitivity to prefixes, i.e. that rb.TypeTag is different from ru.TypeTag * [Eugene++] migratability between mirrors and universes is also worth mentioning * |