Style Selector: Constrain on (DataContext) type

[pr8x]

I've been wanting a feature like for a while now:

<Style Selector="ListBoxItem[DataContext~vms:ISimpleItemViewModel]" >

Syntax is debatable, but having some general-purpose operator for checking type equality (not just value equality) of properties would be certainly nice to have. There are many cases (in my experience) where you want to style some container based on the VM it hosts. Currently it's required to overwrite ItemContainerGenerator and create different containers for different VMs (or by exposing some bool on the VM and bind it to Classses.my-custom-view)

EDIT: For clarity this is not just about DataContext. The operator could be used for other properties as well:

<Style Selector="MyControl[FruitType~vms|Apple]" />

[pr8x]

CompiledBindings will actually throw if the x:DataType provided on a style does not match the DataContext of the item. I wonder if we could just ignore these styles and treat the DataType attribute as part of the style constraint? Or go with the proposed solution of allowing constraints on type.