scala.reflect.api.TypeTags

# WeakTypeTag

#### 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}" )
See also

  scala.reflect.api.TypeTags

Linear Supertypes
Serializable, java.io.Serializable, Equals, AnyRef, Any
Known Subclasses
TypeTag
Type Hierarchy Learn more about scaladoc diagrams
Ordering

1. Alphabetic
2. By inheritance

Inherited

1. WeakTypeTag
2. Serializable
3. Serializable
4. Equals
5. AnyRef
6. Any

Implicitly

1. by any2stringadd
2. by StringFormat
3. by Ensuring
4. by ArrowAssoc

1. Hide All
2. Show all

Learn more about member selection
Visibility

1. Public
2. All

### Abstract Value Members

1. #### 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).

2. #### abstract val mirror: Universe.Mirror

   The underlying `Mirror` of this type tag.

3. #### abstract def tpe: Universe.Type

   Reflective representation of type T.

### Concrete Value Members

1. #### final def !=(arg0: Any): Boolean

   Definition Classes
     AnyRef → Any

2. #### final def ##(): Int

   Definition Classes
     AnyRef → Any

3. #### def +(other: String): String

   Implicit information
     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

4. #### def ->[B](y: B): (Universe.WeakTypeTag[T], B)

   Implicit information
     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()

5. #### final def ==(arg0: Any): Boolean

   Definition Classes
     AnyRef → Any

6. #### final def asInstanceOf[T0]: T0

   Definition Classes
     Any

7. #### def canEqual(x: Any): Boolean

   Definition Classes
     WeakTypeTag → Equals

8. #### def clone(): AnyRef

   Attributes
     protected[java.lang]
   Definition Classes
     AnyRef
   Annotations
     @throws( ... )

9. #### def ensuring(cond: (Universe.WeakTypeTag[T]) ⇒ Boolean, msg: ⇒ Any): Universe.WeakTypeTag[T]

   Implicit information
     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

10. #### def ensuring(cond: (Universe.WeakTypeTag[T]) ⇒ Boolean): Universe.WeakTypeTag[T]

    Implicit information
      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

11. #### def ensuring(cond: Boolean, msg: ⇒ Any): Universe.WeakTypeTag[T]

    Implicit information
      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

12. #### def ensuring(cond: Boolean): Universe.WeakTypeTag[T]

    Implicit information
      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

13. #### final def eq(arg0: AnyRef): Boolean

    Definition Classes
      AnyRef

14. #### def equals(x: Any): Boolean

    Definition Classes
      WeakTypeTag → Equals → AnyRef → Any

15. #### def finalize(): Unit

    Attributes
      protected[java.lang]
    Definition Classes
      AnyRef
    Annotations
      @throws( classOf[java.lang.Throwable] )

16. #### def formatted(fmtstr: String): String

    Implicit information
      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
      @inline()

17. #### final def getClass(): Class[_]

    Definition Classes
      AnyRef → Any

18. #### def hashCode(): Int

    Definition Classes
      WeakTypeTag → AnyRef → Any

19. #### final def isInstanceOf[T0]: Boolean

    Definition Classes
      Any

20. #### final def ne(arg0: AnyRef): Boolean

    Definition Classes
      AnyRef

21. #### final def notify(): Unit

    Definition Classes
      AnyRef

22. #### final def notifyAll(): Unit

    Definition Classes
      AnyRef

23. #### final def synchronized[T0](arg0: ⇒ T0): T0

    Definition Classes
      AnyRef

24. #### def toString(): String

    Definition Classes
      WeakTypeTag → AnyRef → Any

25. #### final def wait(): Unit

    Definition Classes
      AnyRef
    Annotations
      @throws( ... )

26. #### final def wait(arg0: Long, arg1: Int): Unit

    Definition Classes
      AnyRef
    Annotations
      @throws( ... )

27. #### final def wait(arg0: Long): Unit

    Definition Classes
      AnyRef
    Annotations
      @throws( ... )

28. #### def →[B](y: B): (Universe.WeakTypeTag[T], B)

    Implicit information
      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

### Inherited from Serializable

### Inherited from java.io.Serializable

### Inherited from Equals

### Inherited from AnyRef

### Inherited from Any

### Inherited by implicit conversion any2stringadd from Universe.WeakTypeTag[T] to any2stringadd[Universe.WeakTypeTag[T]]

### Inherited by implicit conversion StringFormat from Universe.WeakTypeTag[T] to StringFormat[Universe.WeakTypeTag[T]]

### Inherited by implicit conversion Ensuring from Universe.WeakTypeTag[T] to Ensuring[Universe.WeakTypeTag[T]]

### Inherited by implicit conversion ArrowAssoc from Universe.WeakTypeTag[T] to ArrowAssoc[Universe.WeakTypeTag[T]]

### Ungrouped