Struct Nil 

pub struct Nil;

The Nil type, a.k.a. ε, is used to represent the end of a type-level list, or an empty type-level list.

Nil is commonly used as the Tail of a Cons type, to terminate the list. When used on its own, it represents an empty type-level list.

Read more about type-level lists, a.k.a. the product types, in Cons.

Trait Implementations

impl Clone for ε

fn clone(&self) -> ε

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ε

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Default for ε

fn default() -> ε

Returns the “default value” for a type.

impl<Mapper> MapFields<Mapper> for ε

type Mapped = ε

impl PartialEq for ε

fn eq(&self, other: &ε) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StaticFormat for ε

fn fmt(_f: &mut Formatter<'_>) -> Result<(), Error>

impl Eq for ε

impl StructuralPartialEq for ε