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TraitCollection 

final class TraitCollection
 
extension TraitCollection : Copyable, Equatable, Escapable, Hashable, Sendable

TraitCollection is a collection of already-fetched trait data.

  • Whether the collection contains a Trait of the specified type.

    Declaration

    Swift

    func contains<T>(_ type: T.Type) -> Bool where T : Trait

  • Returns a Trait of the specified type, or nil if the Trait is not included in this TraitGroup` or could not be parsed.

    Declaration

    Swift

    subscript<T>(type: T.Type) -> T? where T : Trait, T : Trait { get }

  • Returns a Boolean value indicating whether two values are equal.

    Equality is the inverse of inequality. For any values a and b, a == b implies that a != b is false.

    Declaration

    Swift

    static func == (lhs: TraitCollection, rhs: TraitCollection) -> Bool

    Parameters

    lhs

    A value to compare.
    rhs

    Another value to compare.

  • Hashes the essential components of this value by feeding them into the given hasher.

    Implement this method to conform to the Hashable protocol. The components used for hashing must be the same as the components compared in your type’s == operator implementation. Call hasher.combine(_:) with each of these components.

    Important

    In your implementation of hash(into:), don’t call finalize() on the hasher instance provided, or replace it with a different instance. Doing so may become a compile-time error in the future.

    Declaration

    Swift

    func hash(into hasher: inout Hasher)