Hi,
This is a functional dependency:
http://www.haskell.org/haskellwiki/Functional_dependencies
[ ]s
Rodrigo
The MonadState class is defined as:
quote:
--------
class Monad m => MonadState s m | m -> s where
...etc...
--------
Please explain the part "| m -> s", that is, the use of the pipe symbol
and the right arrow symbol which follow "MonadState s m".
--
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indicium.us
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