Generics in extensions

GenericStyleExtension.swift

struct InputFieldButtonStyle<Content: View>: ButtonStyle {
    @Environment(\.colorScheme) var colorScheme
    
    let mimicksDropdown: Bool
    let placeholderContent: () -> Content?
    
    init(
        mimicksDropdown: Bool = false,
        @ViewBuilder placeholderContent: @escaping () -> Content? = { nil }
    ) {
        self.mimicksDropdown = mimicksDropdown
        self.placeholderContent = placeholderContent
    }
    
    func makeBody(configuration: Configuration) -> some View {
        VStack(alignment: .leading) {
            configuration.label
                .font(.defaultSubheadline)
            
            HStack {
                ZStack {
                    if let _ = placeholderContent {
                        placeholderContent()
                    }
                    else {
                        configuration.label
                    }
                }
                .foregroundColor(.baseNeutral)

                Spacer()

                if mimicksDropdown {
                    Image(systemName: "chevron.down")
                }
            }
            .foregroundColor(.black)
            //        .foregroundColor(colorScheme == .dark ? .black : .white)
            .padding(20)
            .background(Color.baseGrey)
            .cornerRadius(6)
            .scaleEffect(configuration.isPressed ? 0.98 : 1)
            .font(.defaultBody)
            .animation(
                .interpolatingSpring(
                    mass: 3,
                    stiffness: 60,
                    damping: 100,
                    initialVelocity: 10),
                value: configuration.isPressed)
        }
    }
}

/**/

extension ButtonStyle where Self == InputFieldButtonStyle<AnyView> {
    internal static var input: InputFieldButtonStyle<AnyView> {
        InputFieldButtonStyle()
    }

    internal static func input(mimicksDropdown: Bool = false) -> InputFieldButtonStyle<AnyView> {
        InputFieldButtonStyle(mimicksDropdown: mimicksDropdown)
    }
}

extension ButtonStyle where Self == InputFieldButtonStyle<AnyView> {
    internal static func input<Content: View>(mimicksDropdown: Bool = false,
                               @ViewBuilder placeholderContent: @escaping () -> Content? = { nil }) -> InputFieldButtonStyle<AnyView> {
        InputFieldButtonStyle(mimicksDropdown: mimicksDropdown,
                              placeholderContent: {
                    AnyView(placeholderContent())
            })
    }
}