trait Lens[Container, A] extends Any
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Abstract Value Members
- abstract def get(c: Container): A
get knows how to extract some field of type
Afrom a container - abstract def getClass(): Class[_ <: AnyRef]
- Definition Classes
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- abstract def set(a: A): Mutation[Container]
Represents an assignment operator.
Represents an assignment operator.
Given a value of type A, sets knows how to transform a container such that
ais assigned to the field.We must have get(set(a)(c)) == a
Concrete Value Members
- final def !=(arg0: Any): Boolean
- Definition Classes
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- final def ##: Int
- Definition Classes
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- def :=(a: A): Mutation[Container]
alias to set
- final def ==(arg0: Any): Boolean
- Definition Classes
- Any
- final def asInstanceOf[T0]: T0
- Definition Classes
- Any
- def compose[B](other: Lens[A, B]): Lens[Container, B]
Composes two lenses, this enables nesting.
Composes two lenses, this enables nesting.
If our field of type A has a sub-field of type B, then given a lens for it (other: Lens[A, B]) we can create a single lens from Container to B.
- def equals(arg0: Any): Boolean
- Definition Classes
- Any
- def hashCode(): Int
- Definition Classes
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- final def isInstanceOf[T0]: Boolean
- Definition Classes
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- def modify(f: (A) => A): Mutation[Container]
Represent an update operator (like x.y += 1 )
- def setIfDefined(aOpt: Option[A]): Mutation[Container]
Optional assignment.
Optional assignment.
Given a
Some[A], assign theSome's value to the field. GivenNone, the container is unchanged. - def toString(): String
- Definition Classes
- Any
- def zip[B](other: Lens[Container, B]): Lens[Container, (A, B)]
Given two lenses with the same origin, returns a new lens that can mutate both values represented by both lenses through a tuple.