def observed

bendvy-ecs-core@0.1.0.4 · ordinary_app_records.bend:8

import Base
import bendvy-ecs-core@0.1.0.4/ordinary_app_registration_fields.bend as Stored

8# Return the record owner together with its one detached Fields entry.
9# Does not invoke the registration, advance its cursor or read payloads.
10def observed(~S:Data,~Token:Type,record:Record<S,Token>) -> Record<S,Token> & List<&2,Stored.Fields<S>>:
11  match record:
12    case Record{token,+fields}:(Record{token,fields},[fields])