Struct Option<T>

Allows tracking of whether a value has be initialized (even with the default value) for both reference and value types. Useful where distinguishing between null (or zero, or false) and uninitialized is significant.

Namespace: Akka.Util
Assembly: Akka.dll
Syntax
public struct Option<T>
Type Parameters
Name Description
T

TBD

Constructors

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Option(T)

TBD

Declaration
public Option(T value)
Parameters
Type Name Description
T value

TBD

Fields

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None

None.

Declaration
public static readonly Option<T> None
Field Value
Type Description
Option<T>

Properties

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HasValue

TBD

Declaration
public bool HasValue { get; }
Property Value
Type Description
Boolean
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IsEmpty

Declaration
public bool IsEmpty { get; }
Property Value
Type Description
Boolean
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Value

TBD

Declaration
public T Value { get; }
Property Value
Type Description
T

Methods

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Equals(Option<T>)

Declaration
public bool Equals(Option<T> other)
Parameters
Type Name Description
Option<T> other
Returns
Type Description
Boolean
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Equals(Object)

Declaration
public override bool Equals(object obj)
Parameters
Type Name Description
Object obj
Returns
Type Description
Boolean
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FlatSelect<TNew>(Func<T, Option<TNew>>)

Unwraps the option value and returns it without converting it into an option.

Declaration
public Option<TNew> FlatSelect<TNew>(Func<T, Option<TNew>> mapper)
Parameters
Type Name Description
Func<T, Option<TNew>> mapper

The mapping method.
Returns
Type Description
Option<TNew>
Type Parameters
Name Description
TNew

The output type.
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GetHashCode()

Declaration
public override int GetHashCode()
Returns
Type Description
Int32
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GetOrElse(T)

Gets option value, if any, otherwise returns default value provided

Declaration
public T GetOrElse(T fallbackValue)
Parameters
Type Name Description
T fallbackValue
Returns
Type Description
T
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OnSuccess(Action<T>)

Applies specified action to this option, if there is a value

Declaration
public void OnSuccess(Action<T> action)
Parameters
Type Name Description
Action<T> action
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Select<TNew>(Func<T, TNew>)

Applies selector to option value, if value is set

Declaration
public Option<TNew> Select<TNew>(Func<T, TNew> selector)
Parameters
Type Name Description
Func<T, TNew> selector
Returns
Type Description
Option<TNew>
Type Parameters
Name Description
TNew
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ToString()

Declaration
public override string ToString()
Returns
Type Description
String

Operators

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Equality(Option<T>, Option<T>)

Declaration
public static bool operator ==(Option<T> left, Option<T> right)
Parameters
Type Name Description
Option<T> left
Option<T> right
Returns
Type Description
Boolean
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Implicit(T to Option<T>)

Performs an implicit conversion from T to Option<T>.

Declaration
public static implicit operator Option<T>(T value)
Parameters
Type Name Description
T value

The object to convert
Returns
Type Description
Option<T>

The result of the conversion.
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Inequality(Option<T>, Option<T>)

Declaration
public static bool operator !=(Option<T> left, Option<T> right)
Parameters
Type Name Description
Option<T> left
Option<T> right
Returns
Type Description
Boolean

Extension Methods