scala.Predef

<:<

sealed abstract class <:<[-From, +To] extends (From) ⇒ To with Serializable

An instance of A <:< B witnesses that A is a subtype of B. Requiring an implicit argument of the type A <:< B encodes the generalized constraint A <: B.

Annotations
@implicitNotFound( msg = ... )
Note

we need a new type constructor <:< and evidence conforms, as reusing Function1 and identity leads to ambiguities in case of type errors (any2stringadd is inferred)

To constrain any abstract type T that's in scope in a method's argument list (not just the method's own type parameters) simply add an implicit argument of type T <:< U, where U is the required upper bound; or for lower-bounds, use: L <:< T, where L is the required lower bound.

In part contributed by Jason Zaugg.

Linear Supertypes
Serializable, java.io.Serializable, (From) ⇒ To, AnyRef, Any
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Inherited
  1. <:<
  2. Serializable
  3. Serializable
  4. Function1
  5. AnyRef
  6. Any
Implicitly
  1. by any2stringadd
  2. by StringFormat
  3. by Ensuring
  4. by ArrowAssoc
  5. by any2stringadd
  6. by StringFormat
  7. by Ensuring
  8. by ArrowAssoc
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Visibility
  1. Public
  2. All

Instance Constructors

  1. new <:<()

Abstract Value Members

  1. abstract def apply(v1: From): To

    Apply the body of this function to the argument.

    Apply the body of this function to the argument.

    returns

    the result of function application.

    Definition Classes
    Function1

Concrete Value Members

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

    Definition Classes
    AnyRef → Any
  2. final def ##(): Int

    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean

    Definition Classes
    AnyRef → Any
  4. def andThen[A](g: (To) ⇒ A): (From) ⇒ A

    Composes two instances of Function1 in a new Function1, with this function applied first.

    Composes two instances of Function1 in a new Function1, with this function applied first.

    A

    the result type of function g

    g

    a function R => A

    returns

    a new function f such that f(x) == g(apply(x))

    Definition Classes
    Function1
    Annotations
    @unspecialized()
  5. final def asInstanceOf[T0]: T0

    Definition Classes
    Any
  6. def clone(): AnyRef

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  7. def compose[A](g: (A) ⇒ From): (A) ⇒ To

    Composes two instances of Function1 in a new Function1, with this function applied last.

    Composes two instances of Function1 in a new Function1, with this function applied last.

    A

    the type to which function g can be applied

    g

    a function A => T1

    returns

    a new function f such that f(x) == apply(g(x))

    Definition Classes
    Function1
    Annotations
    @unspecialized()
  8. final def eq(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef
  9. def equals(arg0: Any): Boolean

    Definition Classes
    AnyRef → Any
  10. def finalize(): Unit

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  11. final def getClass(): java.lang.Class[_]

    Definition Classes
    AnyRef → Any
  12. def hashCode(): Int

    Definition Classes
    AnyRef → Any
  13. final def isInstanceOf[T0]: Boolean

    Definition Classes
    Any
  14. final def ne(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef
  15. final def notify(): Unit

    Definition Classes
    AnyRef
  16. final def notifyAll(): Unit

    Definition Classes
    AnyRef
  17. final def synchronized[T0](arg0: ⇒ T0): T0

    Definition Classes
    AnyRef
  18. def toString(): java.lang.String

    Definition Classes
    Function1 → AnyRef → Any
  19. final def wait(): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  20. final def wait(arg0: Long, arg1: Int): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  21. final def wait(arg0: Long): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

Shadowed Implicit Value Members

  1. def +(other: String): String

    Implicit information
    This member is added by an implicit conversion from <:<[From, To] to any2stringadd[<:<[From, To]] performed by method any2stringadd in scala.Predef.
    Shadowing
    This implicitly inherited member is ambiguous. One or more implicitly inherited members have similar signatures, so calling this member may produce an ambiguous implicit conversion compiler error.
    To access this member you can use a type ascription:
    (<:<: any2stringadd[<:<[From, To]]).+(other)
    Definition Classes
    any2stringadd
  2. def +(other: String): String

    Implicit information
    This member is added by an implicit conversion from <:<[From, To] to any2stringadd[<:<[From, To]] performed by method any2stringadd in scala.Predef.
    Shadowing
    This implicitly inherited member is ambiguous. One or more implicitly inherited members have similar signatures, so calling this member may produce an ambiguous implicit conversion compiler error.
    To access this member you can use a type ascription:
    (<:<: any2stringadd[<:<[From, To]]).+(other)
    Definition Classes
    any2stringadd
  3. def ->[B](y: B): (<:<[From, To], B)

    Implicit information
    This member is added by an implicit conversion from <:<[From, To] to ArrowAssoc[<:<[From, To]] performed by method ArrowAssoc in scala.Predef.
    Shadowing
    This implicitly inherited member is ambiguous. One or more implicitly inherited members have similar signatures, so calling this member may produce an ambiguous implicit conversion compiler error.
    To access this member you can use a type ascription:
    (<:<: ArrowAssoc[<:<[From, To]]).->(y)
    Definition Classes
    ArrowAssoc
    Annotations
    @inline()
  4. def ->[B](y: B): (<:<[From, To], B)

    Implicit information
    This member is added by an implicit conversion from <:<[From, To] to ArrowAssoc[<:<[From, To]] performed by method ArrowAssoc in scala.Predef.
    Shadowing
    This implicitly inherited member is ambiguous. One or more implicitly inherited members have similar signatures, so calling this member may produce an ambiguous implicit conversion compiler error.
    To access this member you can use a type ascription:
    (<:<: ArrowAssoc[<:<[From, To]]).->(y)
    Definition Classes
    ArrowAssoc
    Annotations
    @inline()
  5. def ensuring(cond: (<:<[From, To]) ⇒ Boolean, msg: ⇒ Any): <:<[From, To]

    Implicit information
    This member is added by an implicit conversion from <:<[From, To] to Ensuring[<:<[From, To]] performed by method Ensuring in scala.Predef.
    Shadowing
    This implicitly inherited member is ambiguous. One or more implicitly inherited members have similar signatures, so calling this member may produce an ambiguous implicit conversion compiler error.
    To access this member you can use a type ascription:
    (<:<: Ensuring[<:<[From, To]]).ensuring(cond, msg)
    Definition Classes
    Ensuring
  6. def ensuring(cond: (<:<[From, To]) ⇒ Boolean): <:<[From, To]

    Implicit information
    This member is added by an implicit conversion from <:<[From, To] to Ensuring[<:<[From, To]] performed by method Ensuring in scala.Predef.
    Shadowing
    This implicitly inherited member is ambiguous. One or more implicitly inherited members have similar signatures, so calling this member may produce an ambiguous implicit conversion compiler error.
    To access this member you can use a type ascription:
    (<:<: Ensuring[<:<[From, To]]).ensuring(cond)
    Definition Classes
    Ensuring
  7. def ensuring(cond: Boolean, msg: ⇒ Any): <:<[From, To]

    Implicit information
    This member is added by an implicit conversion from <:<[From, To] to Ensuring[<:<[From, To]] performed by method Ensuring in scala.Predef.
    Shadowing
    This implicitly inherited member is ambiguous. One or more implicitly inherited members have similar signatures, so calling this member may produce an ambiguous implicit conversion compiler error.
    To access this member you can use a type ascription:
    (<:<: Ensuring[<:<[From, To]]).ensuring(cond, msg)
    Definition Classes
    Ensuring
  8. def ensuring(cond: Boolean): <:<[From, To]

    Implicit information
    This member is added by an implicit conversion from <:<[From, To] to Ensuring[<:<[From, To]] performed by method Ensuring in scala.Predef.
    Shadowing
    This implicitly inherited member is ambiguous. One or more implicitly inherited members have similar signatures, so calling this member may produce an ambiguous implicit conversion compiler error.
    To access this member you can use a type ascription:
    (<:<: Ensuring[<:<[From, To]]).ensuring(cond)
    Definition Classes
    Ensuring
  9. def ensuring(cond: (<:<[From, To]) ⇒ Boolean, msg: ⇒ Any): <:<[From, To]

    Implicit information
    This member is added by an implicit conversion from <:<[From, To] to Ensuring[<:<[From, To]] performed by method Ensuring in scala.Predef.
    Shadowing
    This implicitly inherited member is ambiguous. One or more implicitly inherited members have similar signatures, so calling this member may produce an ambiguous implicit conversion compiler error.
    To access this member you can use a type ascription:
    (<:<: Ensuring[<:<[From, To]]).ensuring(cond, msg)
    Definition Classes
    Ensuring
  10. def ensuring(cond: (<:<[From, To]) ⇒ Boolean): <:<[From, To]

    Implicit information
    This member is added by an implicit conversion from <:<[From, To] to Ensuring[<:<[From, To]] performed by method Ensuring in scala.Predef.
    Shadowing
    This implicitly inherited member is ambiguous. One or more implicitly inherited members have similar signatures, so calling this member may produce an ambiguous implicit conversion compiler error.
    To access this member you can use a type ascription:
    (<:<: Ensuring[<:<[From, To]]).ensuring(cond)
    Definition Classes
    Ensuring
  11. def ensuring(cond: Boolean, msg: ⇒ Any): <:<[From, To]

    Implicit information
    This member is added by an implicit conversion from <:<[From, To] to Ensuring[<:<[From, To]] performed by method Ensuring in scala.Predef.
    Shadowing
    This implicitly inherited member is ambiguous. One or more implicitly inherited members have similar signatures, so calling this member may produce an ambiguous implicit conversion compiler error.
    To access this member you can use a type ascription:
    (<:<: Ensuring[<:<[From, To]]).ensuring(cond, msg)
    Definition Classes
    Ensuring
  12. def ensuring(cond: Boolean): <:<[From, To]

    Implicit information
    This member is added by an implicit conversion from <:<[From, To] to Ensuring[<:<[From, To]] performed by method Ensuring in scala.Predef.
    Shadowing
    This implicitly inherited member is ambiguous. One or more implicitly inherited members have similar signatures, so calling this member may produce an ambiguous implicit conversion compiler error.
    To access this member you can use a type ascription:
    (<:<: Ensuring[<:<[From, To]]).ensuring(cond)
    Definition Classes
    Ensuring
  13. def formatted(fmtstr: String): String

    Returns string formatted according to given format string.

    Returns string formatted according to given format string. Format strings are as for String.format (@see java.lang.String.format).

    Implicit information
    This member is added by an implicit conversion from <:<[From, To] to StringFormat[<:<[From, To]] performed by method StringFormat in scala.Predef.
    Shadowing
    This implicitly inherited member is ambiguous. One or more implicitly inherited members have similar signatures, so calling this member may produce an ambiguous implicit conversion compiler error.
    To access this member you can use a type ascription:
    (<:<: StringFormat[<:<[From, To]]).formatted(fmtstr)
    Definition Classes
    StringFormat
    Annotations
    @inline()
  14. def formatted(fmtstr: String): String

    Returns string formatted according to given format string.

    Returns string formatted according to given format string. Format strings are as for String.format (@see java.lang.String.format).

    Implicit information
    This member is added by an implicit conversion from <:<[From, To] to StringFormat[<:<[From, To]] performed by method StringFormat in scala.Predef.
    Shadowing
    This implicitly inherited member is ambiguous. One or more implicitly inherited members have similar signatures, so calling this member may produce an ambiguous implicit conversion compiler error.
    To access this member you can use a type ascription:
    (<:<: StringFormat[<:<[From, To]]).formatted(fmtstr)
    Definition Classes
    StringFormat
    Annotations
    @inline()
  15. def [B](y: B): (<:<[From, To], B)

    Implicit information
    This member is added by an implicit conversion from <:<[From, To] to ArrowAssoc[<:<[From, To]] performed by method ArrowAssoc in scala.Predef.
    Shadowing
    This implicitly inherited member is ambiguous. One or more implicitly inherited members have similar signatures, so calling this member may produce an ambiguous implicit conversion compiler error.
    To access this member you can use a type ascription:
    (<:<: ArrowAssoc[<:<[From, To]]).→(y)
    Definition Classes
    ArrowAssoc
  16. def [B](y: B): (<:<[From, To], B)

    Implicit information
    This member is added by an implicit conversion from <:<[From, To] to ArrowAssoc[<:<[From, To]] performed by method ArrowAssoc in scala.Predef.
    Shadowing
    This implicitly inherited member is ambiguous. One or more implicitly inherited members have similar signatures, so calling this member may produce an ambiguous implicit conversion compiler error.
    To access this member you can use a type ascription:
    (<:<: ArrowAssoc[<:<[From, To]]).→(y)
    Definition Classes
    ArrowAssoc

Inherited from Serializable

Inherited from java.io.Serializable

Inherited from (From) ⇒ To

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion any2stringadd from <:<[From, To] to any2stringadd[<:<[From, To]]

Inherited by implicit conversion StringFormat from <:<[From, To] to StringFormat[<:<[From, To]]

Inherited by implicit conversion Ensuring from <:<[From, To] to Ensuring[<:<[From, To]]

Inherited by implicit conversion ArrowAssoc from <:<[From, To] to ArrowAssoc[<:<[From, To]]

Inherited by implicit conversion any2stringadd from <:<[From, To] to any2stringadd[<:<[From, To]]

Inherited by implicit conversion StringFormat from <:<[From, To] to StringFormat[<:<[From, To]]

Inherited by implicit conversion Ensuring from <:<[From, To] to Ensuring[<:<[From, To]]

Inherited by implicit conversion ArrowAssoc from <:<[From, To] to ArrowAssoc[<:<[From, To]]

Ungrouped