Struct CallContext 

pub struct CallContext {
    pub parent_exec_id: ExecId,
    pub target: FunctionKey,
    pub input_aliases: HashMap<String, NodeSiteId>,
    pub output_forwarding: HashMap<NodeSiteId, NodeSiteId>,
    pub outputs_remaining: usize,
}

Per-call invocation context, keyed by the body’s fresh ExecId in Engine.pending_calls.

Fields

parent_exec_id: ExecId

The caller’s ExecId - where input slots live and where output forwarding writes back.

target: FunctionKey

The called function’s symbol-table key. Stamped onto the engine.function_call tracing span so traces attribute body activity to the calling function.

input_aliases: HashMap<String, NodeSiteId>

Formal parameter name → caller-side NodeSiteId. Body nodes that consume a formal input look up the alias here and read from slot_table[(alias_site, parent_exec_id)]. No value copy - body reads from caller’s slot directly.

output_forwarding: HashMap<NodeSiteId, NodeSiteId>

Body-side NodeSiteId → caller-side NodeSiteId. When write_outputs writes to a body output site, the value is also moved to the matching caller site at parent_exec_id, and push_ready_consumers is re-run for the caller’s downstream.

outputs_remaining: usize

Decremented each time an output is forwarded; the entry is dropped from pending_calls when this reaches zero.

Trait Implementations

impl Debug for CallContext

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

Formats the value using the given formatter.