Struct EvalContext 

pub struct EvalContext<'a> {
    pub tags: &'a [Tag],
    pub metadata: &'a BTreeMap<String, String>,
}

(tags, metadata) context passed to Predicate::evaluate. Decoupled from CapabilitySet so the predicate evaluator works against the substrate’s pre-Phase-A.5 capability shape AND the post-migration shape (tags: HashSet<Tag>) without churn.

Fields

tags: &'a [Tag]

Tag set against which axis predicates evaluate.

metadata: &'a BTreeMap<String, String>

Key-value metadata against which metadata predicates evaluate.

Implementations

impl<'a> EvalContext<'a>

pub fn new(tags: &'a [Tag], metadata: &'a BTreeMap<String, String>) -> Self

Build a context from explicit slices. The most common constructor for callers that hold a Vec<Tag> or &[Tag].

Trait Implementations

impl<'a> Clone for EvalContext<'a>

fn clone(&self) -> EvalContext<'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for EvalContext<'a>

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

Formats the value using the given formatter.

impl<'a> Copy for EvalContext<'a>