Thomas Bereknyei tomberek at
Thu Feb 19 13:31:10 UTC 2015

I guess it is not broken, just that it has no maintainer.

Regardless, is there any traction for an "ado" language extension? The
ApplicativeDo proposal advocates for a "do" that automatically downgrades
to Applicative, but that may be too much or powerful. Opt-in via "ado"
might be the right answer.

In a somewhat related/unrelated question. Is there a mechanism to fork an
Arrow into a separate thread? I would assume it would end up looking like:

forkArrow :: Arrow a => a b c -> Chan b -> Chan c -> IO ()
or perhaps :: Arrow a => a b c -> Chan b -> IO (Chan c)

Is there any way to manipulate the (Input, Output) pair as an arrow itself
along with other arrows that have been "forked".


On Wed, Feb 18, 2015 at 11:26 AM, adam vogt <vogt.adam at> wrote:

> What part of applicative-quoters is broken for you? compiles
> on ghc-7.8.4 here, and [ado| a <- Just (); b <- Just 2; (a,b) |]
> evaluates to Just ((),2) as it should.
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