23 lines
942 B
Text
23 lines
942 B
Text
# scoped.ludic — a despawned entity drops out of subsequent event-driven work
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# (replaces tests/mod_c/scoped_mod.c, which tested entity-scoped foreign callbacks
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# swept on despawn). Here a @On(Tick) listener counts live Units each tick; after
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# the Unit is despawned, a further tick finds none. Fires twice before the kill,
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# not the third time. Prints 2.
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program Scoped {
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property Health { hp: int = 0 }
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model Unit { Health }
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state ScopedState {
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fires: int = 0
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}
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event Tick { }
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@On(Tick) handler OnTick(scoped_st: mut ScopedState) { for (Health) in query [Health, {Unit}] { scoped_st.fires += 1 } }
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entry (scoped_st: ScopedState) {
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spawn Unit { Health { hp: 1 } }
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emit Tick() # 1 live Unit -> fires = 1
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emit Tick() # fires = 2
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for (Health) in query [Health, {Unit}] { despawn self() } # kill the Unit
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emit Tick() # no live Units -> fires stays 2
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print(scoped_st.fires) # 2
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}
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}
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