Struct index_ext::tag::Constant

pub struct Constant<T>(/* private fields */);

A tag using a ConstantSource.

The only safe way to construct an ExactSize is by copying the associated constant which expresses the length indicated in the trait impl. This implies that the value is unique. (Disregarding unsound rustc issues that allow duplicate trait impls).

Implementations

impl<T: ConstantSource> Constant<T>

pub const EXACT_SIZE: ExactSize<Self> = _

A constructed instance of ExactSize<Self>.

The instance can be freely copied. Making this an associated constant ensures that the length associated with the type is the associated LEN constant while also permitting use in const environments, despite the ConstantSource bound on the parameter. There are no other safe constructors for this tag’s ExactSize type.

Trait Implementations

impl<T> Clone for Constant<T>

fn clone(&self) -> Self

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T> Copy for Constant<T>

impl<T: ConstantSource> Tag for Constant<T>