Type Alias Decl 

pub(crate) type Decl<'ra> = Interned<'ra, DeclData<'ra>>;

Interned is used because values of this type have “identity” and compare as unequal even if they have the same contents.

Aliased Type

pub(crate) struct Decl<'ra>(pub &'ra DeclData<'ra>, pub PrivateZst);

Tuple Fields

0: &'ra DeclData<'ra>

1: PrivateZst

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: 8 bytes