Hi, I tried to achieve the same thing, i.e. multiple optional viewbuilder parameter, and came to a solution that works well. Let's take a swipeable view where you have 3 types of content : struct SwipeItem<Content: View, Left: View, Right: View>: View{   private var content: () -> Content   private var left: (() -> Left)?   private var right: (() -> Right)?       private init(@ViewBuilder content: @escaping () -> Content, left: (() -> Left)?, right: (() -> Right)?){     self.content = content     self.left = left     self.right = right   }       var body: some View{ // simplified body     HStack{       left?()       content()       right?()     }   } } You have on constructor that accept both optional parameters and you can make it private. Then you can use extensions as : extension SwipeItem{   init(@ViewBuilder content: @escaping () -> Content, @ViewBuilder left: @escaping () -> Left, @ViewBuilder right: @escaping () -> Right){     self.content = content     self.left = left     self.right = right   }       init(@ViewBuilder content: @escaping () -> Content, @ViewBuilder left: @escaping () -> Left) where Right == EmptyView{     self.init(content: content, left: left, right: nil)   }       init(@ViewBuilder content: @escaping () -> Content, @ViewBuilder right: @escaping () -> Right) where Left == EmptyView{     self.init(content: content, left: nil, right: right)   } } EmptyView represents the "absence" of view. So you can attach a "where" clause next to your constructor. Then you can use it as : struct SwipeItem_Previews: PreviewProvider{   static var previews: some View{     SwipeItem {       Text("test")     } left:{      Text("left")     } right: {       Text("right")     } SwipeItem {       Text("test")     } left:{      Text("left")     }   } } I've been looking for a solution and found nothing to explain this (had to read a lot of docs about generics). Hope this can help.