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ceedubs merged 2 commits into from
Jun 11, 2018
Merged

Update state.md #2248

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85a920a
Update state.md
rsekulski May 6, 2018
967c869
Added code which presents type safety of IndexedStateT
rsekulski May 31, 2018
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4 changes: 2 additions & 2 deletions docs/src/main/tut/datatypes/state.md
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Expand Up @@ -282,8 +282,8 @@ So, let's model our typed door:
import cats.Eval
import cats.data.IndexedStateT

def open: IndexedStateT[Eval, Open.type, Closed.type, Unit] = IndexedStateT.set(Closed)
def close: IndexedStateT[Eval, Closed.type, Open.type, Unit] = IndexedStateT.set(Open)
def open: IndexedStateT[Eval, Closed.type, Open.type, Unit] = IndexedStateT.set(Open)
def close: IndexedStateT[Eval, Open.type, Closed.type, Unit] = IndexedStateT.set(Closed)
```

We can now reject, at compile time, sequences of `open` and `close` that are invalid:
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