A method that should be called from every well-designed equals method that is open to be overridden in a subclass.
A method that should be called from every well-designed equals method that is open to be overridden in a subclass. See Programming in Scala, Chapter 28 for discussion and design.
true if this instance can possibly equal that
, otherwise false
The universal equality method defined in AnyRef
.
Produces a new array with element type T
and length len
Produces a new array with element type T
and length len
A ClassTag[T] can serve as an extractor that matches only objects of type T.
A ClassTag[T] can serve as an extractor that matches only objects of type T.
The compiler tries to turn unchecked type tests in pattern matches into checked ones
by wrapping a (_: T)
type pattern as ct(_: T)
, where ct
is the ClassTag[T]
instance.
Type tests necessary before calling other extractors are treated similarly.
SomeExtractor(...)
is turned into ct(SomeExtractor(...))
if T
in SomeExtractor.unapply(x: T)
is uncheckable, but we have an instance of ClassTag[T]
.
Produces a ClassTag
that knows how to instantiate an Array[Array[T]]
Tests whether the type represented by this manifest is a subtype
of the type represented by that
manifest, subject to the limitations
described in the header.
Tests whether the type represented by this manifest is a subtype
of the type represented by that
manifest, subject to the limitations
described in the header.
(Since version 2.10.0) Use scala.reflect.runtime.universe.TypeTag for subtype checking instead
Tests whether the type represented by this manifest is a supertype
of the type represented by that
manifest, subject to the limitations
described in the header.
Tests whether the type represented by this manifest is a supertype
of the type represented by that
manifest, subject to the limitations
described in the header.
(Since version 2.10.0) Use scala.reflect.runtime.universe.TypeTag for subtype checking instead
(Since version 2.10.0) Use wrap instead
(Since version 2.10.0) Use runtimeClass instead
(Since version 2.10.0) Use wrap.newArray instead
(Since version 2.10.0) Use wrap.wrap.newArray instead
(Since version 2.10.0) Use wrap.wrap.wrap.newArray instead
(Since version 2.10.0) Use wrap.wrap.wrap.wrap.newArray instead
(Since version 2.10.0) Use ArrayBuilder.make(this) instead
(Since version 2.10.0) Create WrappedArray directly instead
(Since version 2.10.0) Use scala.reflect.runtime.universe.TypeTag to capture type structure instead
A
ClassTag[T]
stores the erased class of a given typeT
, accessible via theruntimeClass
field. This is particularly useful for instantiatingArray
s whose element types are unknown at compile time.ClassTag
s are a weaker special case of scala.reflect.api.TypeTags#TypeTags, in that they wrap only the runtime class of a given type, whereas aTypeTag
contains all static type information. That is,ClassTag
s are constructed from knowing only the top-level class of a type, without necessarily knowing all of its argument types. This runtime information is enough for runtimeArray
creation.For example:
See scala.reflect.api.TypeTags for more examples, or the Reflection Guide: TypeTags for more details.