Packages

trait ByName[ByNameType] extends Serializable

A type class for convert between by-name type and normal by-value type.

Installation 

libraryDependencies += "com.thoughtworks.feature" %% "byname" % "latest.release"

This ByName type class provide an extension method extract for ByName.=> types via implicit view, which can be import as follow:

import com.thoughtworks.feature.ByName.ops._
Author:

杨博 (Yang Bo) <[email protected]>

ByNameType

The by-name type

Source
ByName.scala
Note

When using this ByName type class, you should make sure the type parameter ByNameType is an abstract type, in case of Scala compiler bugs. You can use a trick similar to C++'s Pimpl Idiom to create opacity abstract types

import com.thoughtworks.feature.ByName.`=>`
trait OpacityTypes {
  type IntByName
  implicit def typeClass: ByName.Aux[IntByName, Int]
}

val opacityTypes: OpacityTypes = new OpacityTypes {
  type IntByName = `=>`[Int]
  override def typeClass = ByName[IntByName]
}

import opacityTypes._

Now IntByName is an abstract type with underlying => Int type.

Given a by-name parameter of the return value of getInt(),

val getInt = stubFunction[Int]
val boxedByName: IntByName = typeClass.make(getInt())

when getInt returns 42,

getInt.when.once returns 42

then the value of the the by-name parameter should be 42;

boxedByName.extract should be(42)

when getInt returns 144,

getInt.when.once returns 144

then the value of the the by-name parameter should be 144.

boxedByName.extract should be(144)
Linear Supertypes
Serializable, Serializable, AnyRef, Any
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Inherited
  1. ByName
  2. Serializable
  3. Serializable
  4. AnyRef
  5. Any
Implicitly
  1. by any2stringadd
  2. by StringFormat
  3. by Ensuring
  4. by ArrowAssoc
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Visibility
  1. Public
  2. All

Type Members

  1. abstract type Value

Abstract Value Members

  1. abstract def extract(byName: ByNameType): Value
  2. abstract def make(byName: ⇒ Value): ByNameType

    Creates a by-name parameter.

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
    This member is added by an implicit conversion from ByName[ByNameType] to any2stringadd[ByName[ByNameType]] performed by method any2stringadd in scala.Predef.
    Definition Classes
    any2stringadd
  4. def ->[B](y: B): (ByName[ByNameType], B)
    Implicit
    This member is added by an implicit conversion from ByName[ByNameType] to ArrowAssoc[ByName[ByNameType]] 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 clone(): AnyRef
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @native() @throws( ... )
  8. def ensuring(cond: (ByName[ByNameType]) ⇒ Boolean, msg: ⇒ Any): ByName[ByNameType]
    Implicit
    This member is added by an implicit conversion from ByName[ByNameType] to Ensuring[ByName[ByNameType]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  9. def ensuring(cond: (ByName[ByNameType]) ⇒ Boolean): ByName[ByNameType]
    Implicit
    This member is added by an implicit conversion from ByName[ByNameType] to Ensuring[ByName[ByNameType]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  10. def ensuring(cond: Boolean, msg: ⇒ Any): ByName[ByNameType]
    Implicit
    This member is added by an implicit conversion from ByName[ByNameType] to Ensuring[ByName[ByNameType]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  11. def ensuring(cond: Boolean): ByName[ByNameType]
    Implicit
    This member is added by an implicit conversion from ByName[ByNameType] to Ensuring[ByName[ByNameType]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  12. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  13. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  14. def finalize(): Unit
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  15. def formatted(fmtstr: String): String
    Implicit
    This member is added by an implicit conversion from ByName[ByNameType] to StringFormat[ByName[ByNameType]] performed by method StringFormat in scala.Predef.
    Definition Classes
    StringFormat
    Annotations
    @inline()
  16. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  17. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  18. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  19. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  20. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  21. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  22. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  23. def toString(): String
    Definition Classes
    AnyRef → Any
  24. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  25. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  26. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @native() @throws( ... )
  27. def →[B](y: B): (ByName[ByNameType], B)
    Implicit
    This member is added by an implicit conversion from ByName[ByNameType] to ArrowAssoc[ByName[ByNameType]] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc

Inherited from Serializable

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion any2stringadd from ByName[ByNameType] to any2stringadd[ByName[ByNameType]]

Inherited by implicit conversion StringFormat from ByName[ByNameType] to StringFormat[ByName[ByNameType]]

Inherited by implicit conversion Ensuring from ByName[ByNameType] to Ensuring[ByName[ByNameType]]

Inherited by implicit conversion ArrowAssoc from ByName[ByNameType] to ArrowAssoc[ByName[ByNameType]]

Ungrouped