kvarn::prelude::fs::prelude::utils::prelude::compact_str::core::ptr

Struct DynMetadata

source 
pub struct DynMetadata<Dyn>
where
    Dyn: ?Sized,
{ /* private fields */ }
🔬This is a nightly-only experimental API. (ptr_metadata)
Expand description

The metadata for a Dyn = dyn SomeTrait trait object type.

It is a pointer to a vtable (virtual call table) that represents all the necessary information to manipulate the concrete type stored inside a trait object. The vtable notably contains:

  • type size
  • type alignment
  • a pointer to the type’s drop_in_place impl (may be a no-op for plain-old-data)
  • pointers to all the metho