# subscript(dynamicMember:) Accesses an entity property by name, for comparison with a known value. ``` subscript(dynamicMember identifier: String) -> T where T : IntentValueConvertible { get throws } ``` ## Overview The code below shows the syntactic sugar and the equivalent, desugared, subscript syntax. ```swift try entity.someName == "My Name" try entity[dynamicMember: "someName"] == "My Name" ``` If the property’s value isn’t an instance of the type `T`, this subscript throws an error. For more information about dynamic-member syntax, see [dynamicMemberLookup](https://docs.swift.org/swift-book/documentation/the-swift-programming-language/attributes#dynamicMemberLookup) in *[The Swift Programming Language](https://docs.swift.org/swift-book/)*. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)