Struct EvalContext 

pub struct EvalContext<'a> {
    pub session: SessionId,
    pub node_id: usize,
    pub symbols: &'a SymbolValues,
    pub scenario: Option<usize>,
    pub shared: Option<&'a TurnShared>,
    pub seating: &'a Seating,
}

Everything an op is given about where and when it is being evaluated. Ops receive it by shared reference: they can read the turn’s symbols and the installed shared resources, and they can identify themselves with (session, node_id), but they cannot reach another node’s values or rebind a symbol.

Fields

session: SessionId

node_id: usize

symbols: &'a SymbolValues

scenario: Option<usize>

shared: Option<&'a TurnShared>

seating: &'a Seating

Which lane each seat of this turn carries. A turn one stream owns is Seating::single, so an op reads the same field either way.

Implementations

impl EvalContext<'static>

pub fn out_of_plan() -> EvalContext<'static>

Context for evaluating outside any plan – const folding and shape inference. What EvalOp::eval_out_of_plan hands the op: no symbol is bound and no shared resource is reachable.

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> Copy for EvalContext<'a>

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

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

Formats the value using the given formatter.