Orkuncakilkaya
808c4a6f7a
action Name { fields } is a typed record; reducer State on Action(s: mut State, a: Action) { ... }
in the module that owns the state takes exactly that state and the action (a second state is
refused); dispatch Action { fields } queues one from anywhere, the queue supplied by the runtime.
The queue is drained at the end of every phase of the frame loop, after every phase of ludic.base's
core_tick_all, and by drain_actions(): in dispatch order, each action's reducers in the order of
their states' names, an action a reducer dispatches queued behind, a queue still growing after 64
rounds stopped with the action named. Examples actions/pack, phases, runaway; rejects for a second
state, a reducer on a non-action and an unknown dispatch; ludic.base's actions_test; LANGUAGE.md.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
24 lines
759 B
Text
24 lines
759 B
Text
# phases.ludic - 0.R: in the frame loop the queue is drained at the end of every phase, so what the
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# Input phase dispatches is reduced before Update reads it. The input translates keys to actions and
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# touches no state of its own.
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program PhaseActions {
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state Hero {
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x: int = 0
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jumps: int = 0
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}
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action Move { dx: int }
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action Jump {}
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reducer Hero on Move(h: mut Hero, a: Move) { h.x += a.dx }
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reducer Hero on Jump(h: mut Hero, a: Jump) { h.jumps += 1 }
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handler Keys phase Input {
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let k = Input.key()
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if k == 'd' { dispatch Move { dx: 1 } }
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if k == 'a' { dispatch Move { dx: -1 } }
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if k == ' ' { dispatch Jump {} }
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if k == 'q' { quit() }
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}
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handler Show(h: Hero) phase Update {
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print(`{h.x} {h.jumps}`)
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}
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}
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