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 TypeTags 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 TypeTags, see the
Reflection Guide: TypeTags
- Annotations
- @implicitNotFound()
- Source
- TypeTags.scala
- See also
- Alphabetic
- By Inheritance
- WeakTypeTag
- Serializable
- Equals
- AnyRef
- Any
- by any2stringadd
- by StringFormat
- by Ensuring
- by ArrowAssoc
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- Public
- Protected
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
Mirrorof 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] toany2stringadd[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] toArrowAssoc[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(classOf[java.lang.CloneNotSupportedException]) @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] toEnsuring[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] toEnsuring[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] toEnsuring[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] toEnsuring[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[_ <: AnyRef]
- 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(classOf[java.lang.InterruptedException])
- final def wait(arg0: Long, arg1: Int): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.InterruptedException])
- final def wait(arg0: Long): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.InterruptedException]) @native()
Deprecated Value Members
- def formatted(fmtstr: String): String
- Implicit
- This member is added by an implicit conversion from Universe.WeakTypeTag[T] toStringFormat[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,formattedresolves to the new method in String which has reversed parameters.
- def →[B](y: B): (Universe.WeakTypeTag[T], B)
- Implicit
- This member is added by an implicit conversion from Universe.WeakTypeTag[T] toArrowAssoc[Universe.WeakTypeTag[T]] performed by method ArrowAssoc in scala.Predef.
- Definition Classes
- ArrowAssoc
- Annotations
- @deprecated
- Deprecated
(Since version 2.13.0) Use
->instead. If you still wish to display it as one character, consider using a font with programming ligatures such as Fira Code.