Struct Singleton 

pub struct Singleton;

A field that appears at most once, such as Content-Length or Content-Type: a second instance is an error, even with the same value.

Trait Implementations

impl Clone for Singleton

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Combination for Singleton

impl Copy for Singleton

impl Debug for Singleton

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

Formats the value using the given formatter.

impl Eq for Singleton

impl Hash for Singleton

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Singleton

fn eq(&self, other: &Self) -> bool

Equality operator ==.

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

Inequality operator !=.

impl SingleValue for Singleton

impl StructuralPartialEq for Singleton