World.reserve_id: def of bendvy-ecs-core@0.1.0.3
Import: import bendvy-ecs-core@0.1.0.3/world.bend as World
Lines 136-140 of bendvy-ecs-core@0.1.0.3/world.bend: https://jend.leeeet.dev/read.txt?path=bendvy-ecs-core@0.1.0.3/world.bend&start_line=136&end_line=140

import Base
import entity_allocator.bend as A

# Reserve a full allocator key, returning World in both success and refusal.
# Reservation consumes allocator progress and is not yet visible as a live entity.
def reserve_id(~S:Data,~C:Type,~R:Type,~E:Data,world:World<S,C,R,E>) -> World<S,C,R,E> & Reservation<S>:
  match world:
    case World{namespace,allocator,store,resource,events,pending,registrations,nextSystemId,clock,lifecycle}:reserve_join(~S,~C,~R,~E,namespace,store,resource,events,pending,registrations,nextSystemId,clock,A.reserve(allocator),lifecycle)

Uses (5):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Pair
  https://jend.leeeet.dev/definition.txt?path=bendvy-ecs-core@0.1.0.3/entity_allocator.bend&name=reserve
  https://jend.leeeet.dev/definition.txt?path=bendvy-ecs-core@0.1.0.3/world.bend&name=Reservation
  https://jend.leeeet.dev/definition.txt?path=bendvy-ecs-core@0.1.0.3/world.bend&name=World
  https://jend.leeeet.dev/definition.txt?path=bendvy-ecs-core@0.1.0.3/world.bend&name=reserve_join