AnyDifferentiable

public struct AnyDifferentiable : Differentiable

A type-erased differentiable value.

The AnyDifferentiable type hides the specific underlying types. Associated type DifferenceIdentifier is erased by AnyHashable. The comparisons of whether has updated is forwards to an underlying differentiable value.

You can store mixed-type elements in collection that require Differentiable conformance by wrapping mixed-type elements in AnyDifferentiable:

extension String: Differentiable {}
extension Int: Differentiable {}

let source = [
    AnyDifferentiable("ABC"),
    AnyDifferentiable(100)
]
let target = [
    AnyDifferentiable("ABC"),
    AnyDifferentiable(100),
    AnyDifferentiable(200)
]

let changeset = StagedChangeset(source: source, target: target)
print(changeset.isEmpty)  // prints "false"

  • The value wrapped by this instance.

    Declaration

    Swift

    @inlinable
public var base: Any { get }

  • A type-erased identifier value for difference calculation.

    Declaration

    Swift

    @inlinable
public var differenceIdentifier: AnyHashable { get }

  • Creates a type-erased differentiable value that wraps the given instance.

    Declaration

    Swift

    @inlinable
public init<D>(_ base: D) where D : Differentiable

    Parameters

    base

    A differentiable value to wrap.

  • Indicate whether the content of base is equals to the content of the given source value.

    Declaration

    Swift

    @inlinable
public func isContentEqual(to source: AnyDifferentiable) -> Bool

    Parameters

    source

    A source value to be compared.

    Return Value

    A Boolean value indicating whether the content of base is equals to the content of base of the given source value.

  • Declaration

    Swift

    public var debugDescription: String { get }