Extension

public struct Extension : Declaration, Hashable, Codable
extension Extension: ExpressibleBySyntax
extension Extension: CustomStringConvertible

An extension declaration.

  • The declaration attributes.

    Declaration

    Swift

    public let attributes: [Attribute]

  • The declaration modifiers.

    Declaration

    Swift

    public let modifiers: [Modifier]

  • The declaration keyword ("extension").

    Declaration

    Swift

    public let keyword: String

  • The name of the type extended by the extension.

    Declaration

    Swift

    public let extendedType: String

  • A list of protocol names inherited by the extended type.

    For example, the following extension on structure S has an inheritance of ["P", "Q"]:

     struct S {}
 protocol P {}
 protocol Q {}
 extension S: P, Q {}

    Declaration

    Swift

    public let inheritance: [String]

  • The generic parameter requirements for the declaration.

    For example, the following conditional extension on structure S has a single requirement that its generic parameter identified as "T" conforms to the type identified as "Hahable":

    struct S<T> {}
extension S where T: Hashable {}

    Declaration

    Swift

    public let genericRequirements: [GenericRequirement]

ExpressibleBySyntax

  • Creates an instance initialized with the given syntax node.

    Declaration

    Swift

    public init(_ node: ExtensionDeclSyntax)

CustomStringConvertible

  • Declaration

    Swift

    public var description: String { get }