Struct CapabilityRequirement 

pub struct CapabilityRequirement {
    pub kind: CapabilityKind,
    pub level: RequirementLevel,
    pub desired: SupportState,
}

One requirement in a CapabilityRequest.

desired is the support level the client is requesting. The negotiation comparison uses SupportState equality plus the implicit ordering “any non-Unavailable state is at least as supportive as Unavailable” — adapters whose claim equals or strengthens the desired state satisfy the requirement; adapters whose claim is Unavailable (or the optional capability is missing entirely) do not.

Fields

kind: CapabilityKind

level: RequirementLevel

desired: SupportState

Minimum acceptable support. Native is the strongest. Synthesized, Partial, Manual, and Unavailable are progressively weaker. A client typically asks for Synthesized or Native; asking for Manual is unusual but valid.

Implementations

impl CapabilityRequirement

pub fn required(kind: CapabilityKind, desired: SupportState) -> Self

pub fn preferred(kind: CapabilityKind, desired: SupportState) -> Self

pub fn optional(kind: CapabilityKind, desired: SupportState) -> Self

Trait Implementations

impl Clone for CapabilityRequirement

fn clone(&self) -> CapabilityRequirement

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CapabilityRequirement

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

Formats the value using the given formatter.

impl PartialEq for CapabilityRequirement

fn eq(&self, other: &CapabilityRequirement) -> 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 Eq for CapabilityRequirement

impl StructuralPartialEq for CapabilityRequirement