Struct Capabilities 

pub struct Capabilities {
    pub can_project: bool,
    pub can_filter: bool,
    pub can_sample: bool,
}

What the publisher is willing to do server-side when accepting a subscription.

Only can_project defaults to true. The other two fields exist so the wire format is stable when filter and sampling support land, and so consumers can already gate features on what the server advertises.

Fields

can_project: bool

Server honours [SubscriptionDescriptor::columns] for projection.

can_filter: bool

Server honours [SubscriptionDescriptor::filter] for row-level filtering.

can_sample: bool

Server honours [SubscriptionDescriptor::sampling].

Implementations

impl Capabilities

pub const fn minimal() -> Capabilities

Minimum guaranteed capability set

pub const fn all() -> Capabilities

All capabilities enabled.

Trait Implementations

impl Clone for Capabilities

fn clone(&self) -> Capabilities

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<(), Error>

Formats the value using the given formatter.

impl Default for Capabilities

fn default() -> Capabilities

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Capabilities

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for Capabilities

fn eq(&self, other: &Capabilities) -> 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 Capabilities

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 Copy for Capabilities

impl Eq for Capabilities

impl StructuralPartialEq for Capabilities