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Add note in readme to guard against NPEs in cyclical states #31

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Apr 29, 2024
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5 changes: 5 additions & 0 deletions README.md
Original file line number Diff line number Diff line change
Expand Up @@ -33,6 +33,11 @@ data object Amber : Color({ setOf(Red) })
data object Red : Color({ setOf(Green) })
```

<aside>
Be sure to define your state constructor with functions rather than literal values if you require cycles in your state
machine. Otherwise, you are likely to encounter null pointer exceptions.
</aside>

### Value

The value is responsible for knowing and updating its current state.
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