Trait objc2::mutability::IsMutable
source · pub unsafe trait IsMutable: Sealed + IsAllowedMutable { }Expand description
Marker trait for classes that are only mutable through &mut.
This is implemented for classes whose ClassType::Mutability is one of:
Notably, InteriorMutable does not implement this (though it is
technically mutable), since it is allowed to mutate through shared
references.
This trait inherits IsAllowedMutable, so if a function is bound by
this, functionality given with that trait is available.
§Safety
This is a sealed trait, and should not need to be implemented. Open an issue if you know a use-case where this restrition should be lifted!