| Copyright | (c) Andy Gill 2001, (c) Oregon Graduate Institute of Science and Technology, 2001 |
|---|---|
| License | BSD-style (see the file LICENSE) |
| Maintainer | ross@soi.city.ac.uk |
| Stability | experimental |
| Portability | portable |
| Safe Haskell | Safe-Inferred |
| Language | Haskell98 |
Control.Monad.Trans.State
Description
State monads, passing an updatable state through a computation.
Some computations may not require the full power of state transformers:
- For a read-only state, see Control.Monad.Trans.Reader.
- To accumulate a value without using it on the way, see Control.Monad.Trans.Writer.
This version is lazy; for a strict version, see Control.Monad.Trans.State.Strict, which has the same interface.