Macro gc_shadowstack 

macro_rules! gc_shadowstack {
    ($name: ident,$traceable: path,$rootable: ident,$rooted: ident,$handle: ident,$letroot: ident) => { ... };
}

Instatiate shadow stack type that can work with your GC API.

Paramters

• $name: Shadow stack type name itself.
• $traceable: Your GC traceable trait that is implemented for all types that can be traced.
• $rootable: New trait name that should be implemented for rooted values.
• $rooted: Type of rooted value.
• $handle: Type of reference to rooted value. This creates $handle and $handle Mut types.
• $letroot: Name that is given to macro that will instantiate rooted values.