[Haskell-cafe] name for monad-like structure?

[Michael Vanier]

Tony Morris wrote:
> Michael Vanier wrote:
>   
>> I've stumbled upon a structure that is like a weaker version of a
>> monad, one that supports return and >> but not >>=.  Has anyone seen
>> this before, and if so, does it have a standard name?
>>
>> Mike
>>
>>
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>>
>>     
> Are you sure it supports
> (>>) :: m a -> m b -> m b
>
> and not
> mplus :: m a -> m a -> m a ?
>
>   
Yeah, you're right.  It's basically a monad where the type a is fixed to 
be (), so you just have

(>>) :: m () -> m () -> m ()

Mike


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