DynamicVariable

DynamicVariables provide a binding mechanism where the current value is found through dynamic scope, but where access to the variable itself is resolved through static scope.

The current value can be retrieved with the value method. New values should be pushed using the withValue method. Values pushed via withValue only stay valid while the withValue's second argument, a parameterless closure, executes. When the second argument finishes, the variable reverts to the previous value.

someDynamicVariable.withValue(newValue) {
// ... code called in here that calls value ...
// ... will be given back the newValue ...
}

Each thread gets its own stack of bindings. When a new thread is created, the DynamicVariable gets a copy of the stack of bindings from the parent thread, and from then on the bindings for the new thread are independent of those for the original thread.

Source: DynamicVariable.scala
Version: 1.1, 2007-5-21

Linear Supertypes

AnyRef, Any

Type Hierarchy Learn more about scaladoc diagrams

Instance Constructors

new DynamicVariable(init: T)

Value Members

final def !=(arg0: AnyRef): Boolean

Definition Classes
AnyRef
final def !=(arg0: Any): Boolean

Definition Classes
Any
final def ##(): Int

Definition Classes
AnyRef → Any
def +(other: String): String

Implicit information
This member is added by an implicit conversion from DynamicVariable[T] to StringAdd[DynamicVariable[T]] performed by method StringAdd in scala.Predef.
Definition Classes
StringAdd
def ->[B](y: B): (DynamicVariable[T], B)

Implicit information
This member is added by an implicit conversion from DynamicVariable[T] to ArrowAssoc[DynamicVariable[T]] performed by method ArrowAssoc in scala.Predef.
Definition Classes
ArrowAssoc
Annotations
@inline()
final def ==(arg0: AnyRef): Boolean

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

Definition Classes
Any
final def asInstanceOf[T0]: T0

Definition Classes
Any
def clone(): AnyRef

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( ... )
def ensuring(cond: (DynamicVariable[T]) ⇒ Boolean, msg: ⇒ Any): DynamicVariable[T]

Implicit information
This member is added by an implicit conversion from DynamicVariable[T] to Ensuring[DynamicVariable[T]] performed by method Ensuring in scala.Predef.
Definition Classes
Ensuring
def ensuring(cond: (DynamicVariable[T]) ⇒ Boolean): DynamicVariable[T]

Implicit information
This member is added by an implicit conversion from DynamicVariable[T] to Ensuring[DynamicVariable[T]] performed by method Ensuring in scala.Predef.
Definition Classes
Ensuring
def ensuring(cond: Boolean, msg: ⇒ Any): DynamicVariable[T]

Implicit information
This member is added by an implicit conversion from DynamicVariable[T] to Ensuring[DynamicVariable[T]] performed by method Ensuring in scala.Predef.
Definition Classes
Ensuring
def ensuring(cond: Boolean): DynamicVariable[T]

Implicit information
This member is added by an implicit conversion from DynamicVariable[T] to Ensuring[DynamicVariable[T]] performed by method Ensuring in scala.Predef.
Definition Classes
Ensuring
final def eq(arg0: AnyRef): Boolean

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

Definition Classes
AnyRef → Any
def finalize(): Unit

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( classOf[java.lang.Throwable] )
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 DynamicVariable[T] to StringFormat[DynamicVariable[T]] performed by method StringFormat in scala.Predef.
Definition Classes
StringFormat
Annotations
@inline()
final def getClass(): Class[_]

Definition Classes
AnyRef → Any
def hashCode(): Int

Definition Classes
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
final def notifyAll(): Unit

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

Definition Classes
AnyRef
def toString(): String

Definition Classes
DynamicVariable → AnyRef → Any
def value: T

Retrieve the current value
def value_=(newval: T): Unit

Change the currently bound value, discarding the old value.
Change the currently bound value, discarding the old value. Usually withValue() gives better semantics.
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( ... )
def withValue[S](newval: T)(thunk: ⇒ S): S

Set the value of the variable while executing the specified thunk.
Set the value of the variable while executing the specified thunk.
newval
The value to which to set the variable
thunk
The code to evaluate under the new setting
def →[B](y: B): (DynamicVariable[T], B)

Implicit information
This member is added by an implicit conversion from DynamicVariable[T] to ArrowAssoc[DynamicVariable[T]] performed by method ArrowAssoc in scala.Predef.
Definition Classes
ArrowAssoc

class DynamicVariable[T] extends AnyRef

Instance Constructors

new DynamicVariable(init: T)

Value Members

final def !=(arg0: AnyRef): Boolean

final def !=(arg0: Any): Boolean

final def ##(): Int

def +(other: String): String

def ->[B](y: B): (DynamicVariable[T], B)

final def ==(arg0: AnyRef): Boolean

final def ==(arg0: Any): Boolean

final def asInstanceOf[T0]: T0

def clone(): AnyRef

def ensuring(cond: (DynamicVariable[T]) ⇒ Boolean, msg: ⇒ Any): DynamicVariable[T]

def ensuring(cond: (DynamicVariable[T]) ⇒ Boolean): DynamicVariable[T]

def ensuring(cond: Boolean, msg: ⇒ Any): DynamicVariable[T]

def ensuring(cond: Boolean): DynamicVariable[T]

final def eq(arg0: AnyRef): Boolean

def equals(arg0: Any): Boolean

def finalize(): Unit

def formatted(fmtstr: String): String

final def getClass(): Class[_]

def hashCode(): Int

final def isInstanceOf[T0]: Boolean

final def ne(arg0: AnyRef): Boolean

final def notify(): Unit

final def notifyAll(): Unit

final def synchronized[T0](arg0: ⇒ T0): T0

def toString(): String

def value: T

def value_=(newval: T): Unit

final def wait(): Unit

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

final def wait(arg0: Long): Unit

def withValue[S](newval: T)(thunk: ⇒ S): S

def →[B](y: B): (DynamicVariable[T], B)

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion StringAdd from DynamicVariable[T] to StringAdd[DynamicVariable[T]]

Inherited by implicit conversion StringFormat from DynamicVariable[T] to StringFormat[DynamicVariable[T]]

Inherited by implicit conversion Ensuring from DynamicVariable[T] to Ensuring[DynamicVariable[T]]

Inherited by implicit conversion ArrowAssoc from DynamicVariable[T] to ArrowAssoc[DynamicVariable[T]]

Ungrouped