Coproduct4

 
public final class Coproduct4<A, B, C, D> : Coproduct4Of<A, B, C, D>

Represents a sum type of 4 different types.

  • Creates an instance of a coproduct providing a value of the first type.

    Declaration

    Swift

    public static func first(_ a: A) -> Coproduct4<A, B, C, D>

    Parameters

    a

    Value of the first type of the coproduct.

    Return Value

    A coproduct with a value of the first type.

  • Creates an instance of a coproduct providing a value of the second type.

    Declaration

    Swift

    public static func second(_ b: B) -> Coproduct4<A, B, C, D>

    Parameters

    b

    Value of the second type of the coproduct.

    Return Value

    A coproduct with a value of the second type.

  • Creates an instance of a coproduct providing a value of the third type.

    Declaration

    Swift

    public static func third(_ c: C) -> Coproduct4<A, B, C, D>

    Parameters

    c

    Value of the third type of the coproduct.

    Return Value

    A coproduct with a value of the third type.

  • Creates an instance of a coproduct providing a value of the fourth type.

    Declaration

    Swift

    public static func fourth(_ d: D) -> Coproduct4<A, B, C, D>

    Parameters

    d

    Value of the fourth type of the coproduct.

    Return Value

    A coproduct with a value of the fourth type.

  • Applies a function depending on the content of the coproduct.

    Declaration

    Swift

    public func fold<Z>(_ fa: (A) -> Z,
                    _ fb: (B) -> Z,
                    _ fc: (C) -> Z,
                    _ fd: (D) -> Z) -> Z

    Parameters

    fa

    Function to apply with a value of the first type.
    fb

    Function to apply with a value of the second type.
    fc

    Function to apply with a value of the third type.
    fd

    Function to apply with a value of the fourth type.

    Return Value

    A value resulting of the application of the corresponding function based on the content of the coproduct.

  • Retrieves the value of the first type, if present.

    Declaration

    Swift

    public var first: Option<A> { get }

  • Retrieves the value of the second type, if present.

    Declaration

    Swift

    public var second: Option<B> { get }

  • Retrieves the value of the third type, if present.

    Declaration

    Swift

    public var third: Option<C> { get }

  • Retrieves the value of the fourth type, if present.

    Declaration

    Swift

    public var fourth: Option<D> { get }