Orkuncakilkaya
c64f8750e2
What only becomes known inside the drain - a value another reducer just set, the map in play - no longer has to be faked into the action, so a verb that reads several systems while it changes one is a reducer instead of an act handed its states. A second state to write is still refused, and the message says the way out. examples/actions/reads.ludic; reseeded. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
8 lines
303 B
Text
8 lines
303 B
Text
# 0.R: a reducer writes its own state and may read others; a second state to write is refused
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program ReducerTwoStates {
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state Pack { n: int = 0 }
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state Wallet { cash: int = 0 }
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action Buy { cost: int }
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reducer Pack on Buy(p: mut Pack, w: mut Wallet, a: Buy) { p.n += 1 }
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entry { print(1) }
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}
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