Orkuncakilkaya
e2528c1b10
Keywords: module uses friend export internal numbers unsafe mut port bind action reducer registry of as from def open alias component prop view (structure), shows lasts then loads (scenes), system (ecs), dispatch (control), true false null (operators). Attributes: @Ref @OneOf @Range @Unit @Asset @Color, @Node / @Clip / @Material, @Tint @Derived, @Text / @Multiline, @Key, @AppendOnly / @ByKey, @PerMap / @Chunked, @frame @max, @owns / @creates / @releases, @deterministic @alloc_ok. Each is in tools/docgen/inventory.json; every fence that is not marked skip parses (ludicc --fmt). annot-clearcolor's token loses its quotes, which no reader strips. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
658 B
658 B
id: kw-reducer name: reducer category: structure kind: keyword tokens: reducer sig: reducer State on Action(st: mut State, reads..., a: Action) { ... } tip: Applies an action to one state; it may read others. order: 62
A reducer writes exactly one state when its action is dispatched: the first parameter is that state, mut, the last is the action, and any states between are read-only. A change that must touch several states in a set order is a chain: a reducer dispatches the next action.
state Pos { x: int = 0 }
action Move { dx: int = 0 }
reducer Pos on Move(p: mut Pos, a: Move) {
p.x = p.x + a.dx
}