Enum rustc_middle::ty::DynKind

source ·
pub enum DynKind {
    Dyn,
    DynStar,
}
Expand description

Specifies how a trait object is represented.

Variants

Dyn

An unsized dyn Trait object

DynStar

A sized dyn* Trait object

These objects are represented as a (data, vtable) pair where data is a ptr-sized value (often a pointer to the real object, but not necessarily) and vtable is a pointer to the vtable for dyn* Trait. The representation is essentially the same as &dyn Trait or similar, but the drop function included in the vtable is responsible for freeing the underlying storage if needed. This allows a dyn* object to be treated agnostically with respect to whether it points to a Box<T>, Rc<T>, etc.

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more
This method turns the parameters of a DepNodeConstructor into an opaque Fingerprint to be used in DepNode. Not all DepNodeParams support being turned into a Fingerprint (they don’t need to if the corresponding DepNode is anonymous). Read more
This method tries to recover the query key from the given DepNode, something which is needed when forcing DepNodes during red-green evaluation. The query system will only call this method if fingerprint_style() is not FingerprintStyle::Opaque. It is always valid to return None here, in which case incremental compilation will treat the query as having changed instead of forcing it. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

The resulting type after obtaining ownership.
Creates owned data from borrowed data, usually by cloning. Read more
Uses borrowed data to replace owned data, usually by cloning. Read more
The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.

Size: 1 byte

Size for each variant:

  • Dyn: 0 bytes
  • DynStar: 0 bytes