Functor => Applicative => Monad

Stephen Tetley stephen.tetley at
Mon Dec 13 09:20:07 CET 2010

On 13 December 2010 07:48, John Smith <voldermort at> wrote:

> The Haskell committee won't accept a significant change until at least one
> compiler (usually GHC) has already implemented it.

That's the operating principle at least for language extensions where
it is obviously sensible (don't standardized on vapour ware!). For
library changes, which last time around were punted to so time into
the future by the committee, the situation seems a bit more nuanced
and maybe the committee needs a separate operating principle.

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