trait WeakTypeTag[T] extends Equals with Serializable
If an implicit value of type WeakTypeTag[T]
is required, the compiler will create one,
and the reflective representation of T
can be accessed via the tpe
field.
Components of T
can be references to type parameters or abstract types. Note that WeakTypeTag
makes an effort to be as concrete as possible, i.e. if TypeTag
s are available for the referenced type arguments
or abstract types, they are used to embed the concrete types into the WeakTypeTag. Otherwise the WeakTypeTag will
contain a reference to an abstract type. This behavior can be useful, when one expects T
to be perhaps be partially
abstract, but requires special care to handle this case. However, if T
is expected to be fully known, use
scala.reflect.api.TypeTags#TypeTag instead, which statically guarantees this property.
For more information about TypeTag
s, see the
Reflection Guide: TypeTags
- Annotations
- @implicitNotFound( "No WeakTypeTag available for ${T}" )
- Source
- TypeTags.scala
- See also
- Alphabetic
- By Inheritance
- WeakTypeTag
- Serializable
- Serializable
- Equals
- AnyRef
- Any
- by any2stringadd
- by StringFormat
- by Ensuring
- by ArrowAssoc
- Hide All
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- Public
- All
Abstract Value Members
-
abstract
def
in[U <: Universe with Singleton](otherMirror: Mirror[U]): in.U.WeakTypeTag[T]
Migrates the expression into another mirror, jumping into a different universe if necessary.
Migrates the expression into another mirror, jumping into a different universe if necessary.
Migration means that all symbolic references to classes/objects/packages in the expression will be re-resolved within the new mirror (typically using that mirror's classloader).
-
abstract
val
mirror: Universe.Mirror
The underlying
Mirror
of this type tag. -
abstract
def
tpe: Universe.Type
Reflective representation of type T.
Concrete Value Members
-
final
def
!=(arg0: Any): Boolean
- Definition Classes
- AnyRef → Any
-
final
def
##(): Int
- Definition Classes
- AnyRef → Any
-
def
+(other: String): String
- Implicit
- This member is added by an implicit conversion from Universe.WeakTypeTag[T] to any2stringadd[Universe.WeakTypeTag[T]] performed by method any2stringadd in scala.Predef.
- Definition Classes
- any2stringadd
-
def
->[B](y: B): (Universe.WeakTypeTag[T], B)
- Implicit
- This member is added by an implicit conversion from Universe.WeakTypeTag[T] to ArrowAssoc[Universe.WeakTypeTag[T]] performed by method ArrowAssoc in scala.Predef.
- Definition Classes
- ArrowAssoc
- Annotations
- @inline()
-
final
def
==(arg0: Any): Boolean
- Definition Classes
- AnyRef → Any
-
final
def
asInstanceOf[T0]: T0
- Definition Classes
- Any
-
def
canEqual(x: Any): Boolean
- Definition Classes
- WeakTypeTag → Equals
-
def
clone(): AnyRef
- Attributes
- protected[lang]
- Definition Classes
- AnyRef
- Annotations
- @throws( ... ) @native()
-
def
ensuring(cond: (Universe.WeakTypeTag[T]) ⇒ Boolean, msg: ⇒ Any): Universe.WeakTypeTag[T]
- Implicit
- This member is added by an implicit conversion from Universe.WeakTypeTag[T] to Ensuring[Universe.WeakTypeTag[T]] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
-
def
ensuring(cond: (Universe.WeakTypeTag[T]) ⇒ Boolean): Universe.WeakTypeTag[T]
- Implicit
- This member is added by an implicit conversion from Universe.WeakTypeTag[T] to Ensuring[Universe.WeakTypeTag[T]] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
-
def
ensuring(cond: Boolean, msg: ⇒ Any): Universe.WeakTypeTag[T]
- Implicit
- This member is added by an implicit conversion from Universe.WeakTypeTag[T] to Ensuring[Universe.WeakTypeTag[T]] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
-
def
ensuring(cond: Boolean): Universe.WeakTypeTag[T]
- Implicit
- This member is added by an implicit conversion from Universe.WeakTypeTag[T] to Ensuring[Universe.WeakTypeTag[T]] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
-
final
def
eq(arg0: AnyRef): Boolean
- Definition Classes
- AnyRef
-
def
equals(x: Any): Boolean
- Definition Classes
- WeakTypeTag → Equals → AnyRef → Any
-
def
finalize(): Unit
- Attributes
- protected[lang]
- Definition Classes
- AnyRef
- Annotations
- @throws( classOf[java.lang.Throwable] )
-
final
def
getClass(): Class[_]
- Definition Classes
- AnyRef → Any
- Annotations
- @native()
-
def
hashCode(): Int
- Definition Classes
- WeakTypeTag → AnyRef → Any
-
final
def
isInstanceOf[T0]: Boolean
- Definition Classes
- Any
-
final
def
ne(arg0: AnyRef): Boolean
- Definition Classes
- AnyRef
-
final
def
notify(): Unit
- Definition Classes
- AnyRef
- Annotations
- @native()
-
final
def
notifyAll(): Unit
- Definition Classes
- AnyRef
- Annotations
- @native()
-
final
def
synchronized[T0](arg0: ⇒ T0): T0
- Definition Classes
- AnyRef
-
def
toString(): String
- Definition Classes
- WeakTypeTag → AnyRef → Any
-
final
def
wait(): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws( ... )
-
final
def
wait(arg0: Long, arg1: Int): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws( ... )
-
final
def
wait(arg0: Long): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws( ... ) @native()
-
def
→[B](y: B): (Universe.WeakTypeTag[T], B)
- Implicit
- This member is added by an implicit conversion from Universe.WeakTypeTag[T] to ArrowAssoc[Universe.WeakTypeTag[T]] performed by method ArrowAssoc in scala.Predef.
- Definition Classes
- ArrowAssoc
Deprecated Value Members
-
def
formatted(fmtstr: String): String
- Implicit
- This member is added by an implicit conversion from Universe.WeakTypeTag[T] to StringFormat[Universe.WeakTypeTag[T]] performed by method StringFormat in scala.Predef.
- Definition Classes
- StringFormat
- Annotations
- @deprecated @inline()
- Deprecated
(Since version 2.12.16) Use
formatString.format(value)
instead ofvalue.formatted(formatString)
, or use thef""
string interpolator. In Java 15 and later,formatted
resolves to the new method in String which has reversed parameters.