Struct Capabilities 

pub struct Capabilities(/* private fields */);

What this server can actually do, as named booleans.

The specification calls for named booleans and permits any additional key, so this is carried as an ordered map rather than a struct of bool fields: it serialises to exactly the same JSON, keeps the capability names in one list beside the class rule that reads them, and lets a future capability be added without reshaping a type.

A capability this server does not implement is reported false, never omitted — the specification is explicit that a client must be able to tell “not supported” from “server predates this field”.

Implementations

impl Capabilities

pub fn current() -> Self

What this build implements today.

Every flag here is the truth, so a client planning against this document is never told a surface exists that would fail on first use. A capability is added to this list when its conformance checks pass, not when its handler exists.

pub fn class(&self) -> &'static str

The highest class these capabilities actually satisfy.

The enum admits only core, extended and full, so a server that does not yet meet core still has to name one. It names core — the floor it is building toward — and the shortfall surfaces as a failing D-05 rather than as a document that quietly overstates itself.

Trait Implementations

impl Clone for Capabilities

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Capabilities

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

Formats the value using the given formatter.

impl Serialize for Capabilities

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

where __S: Serializer,

Serialize this value into the given Serde serializer.