Struct Empty 

pub struct Empty {}

A struct denoting an empty API request or response.

This type should serialize/deserialize in such a way that we have room to add optional fields in the future without causing old clients to reject the message (backwards-compatible changes).

Always prefer this type over () (unit) to avoid API upgrade hazards. In JSON, unit will only deserialize from "null", meaning we can’t add new optional fields without breaking old clients.

assert_eq!("", serde_urlencoded::to_string(&Empty {}).unwrap());
assert_eq!("{}", serde_json::to_string(&Empty {}).unwrap());

Trait Implementations

impl Debug for Empty

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Empty

fn deserialize<__D>( __deserializer: __D, ) -> Result<Empty, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for Empty

fn eq(&self, other: &Empty) -> 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 Serialize for Empty

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Empty