subscript(dynamicMember:)

Declaration

subscript<ModePreference, Value>(dynamicMember keyPath: KeyPath<Keys.Type, CVAttachmentKeyDefinitionWithDefault<ModePreference, Value>>) -> Value where ModePreference : CVAttachmentModePreference, Value : CVAttachmentValueRepresentable, Value : Equatable, Value : Sendable { get set }

Overview

This subscript provides access to an attachment key as a property. The key to be accessed must be defined as a static property on the Keys type.

extension CVPixelBufferAttachmentKeyDefinitions {
	static var isSpecialPicture: KeyWithDefault<ShouldPropagate, Bool> {
		.init("com.app.isSpecialPicture", default: false)
	}
}

func inspect(attachments: borrowing CVAttachmentAccess<CVPixelBufferAttachmentKeyDefinitions>) {
	if attachments.isSpecialPicture {
		...
	}
}