Thanks, The `don't` function is a big step forward in computering; it will surely prevent many bugs from occurring, with little effort to software developers. Is it published in a scientific magazine yet? Regards, Henk-Jan van Tuyl On Wed, 01 Apr 2020 10:38:08 +0200, Jack Kelly wrote:

Hello all,

I have taken over the maintainership of acme-dont, and am pleased to announce a new acme-dont release on Hackage[1].

acme-dont provides a `don't` function, which does not execute its argument. For example, the following code will not print anything:

import Acme.Dont (don't)

quiet :: IO () quiet = don't $ putStrLn "You'll never see this on stdout"

New in this release:

* `don't` has been generalised from `Monad` to `Applicative`. If you have been waiting since GHC 8.0.1's release in 2016[2] to use `don't` with `-XApplicativeDo`, wait no longer.

* A test suite, to ensure that `don't` does not do anything. Previous versions could have been defined as `don't = void` for all we knew.

Also, the acme-dont community now has a new home on sourcehut. On there, you can find the following invaluable resources:

* A source repository[3], to track further developement and new ways of not doing things, with a commit history reconstructed from the release tarballs uploaded to Hackage.

* A mailing list[4] for the acme-dont community to discuss the best ways of not doing things.

* A bug tracker[5] to handle reports, in case someone observes acme-dont doing something.

* Continuous integration[6], to ensure that acme-dont continues to not do things across multiple versions of GHC.

I would like to thank Gracjan Polak for uploading the initial releases of `acme-dont`, and for maintaining the package these past eleven years. I do not intend to betray the responsibility he has assigned me in handing over this critical package.

Best,

-- Jack

[1]: https://hackage.haskell.org/package/acme-dont-1.2 [2]: https://www.haskell.org/ghc/download_ghc_8_0_1 [3]: https://git.sr.ht/~jack/acme-dont [4]: https://lists.sr.ht/~jack/acme-dont-discuss [5]: https://todo.sr.ht/~jack/acme-dont [6]: https://builds.sr.ht/~jack/acme-dont _______________________________________________ Haskell-Cafe mailing list To (un)subscribe, modify options or view archives go to: http://mail.haskell.org/cgi-bin/mailman/listinfo/haskell-cafe Only members subscribed via the mailman list are allowed to post.

-- Message from Stanford University: Folding@home What if you could share your unused computer power to help find a cure? In just 5 minutes you can join the world's biggest networked computer and get us closer sooner. Watch the video. https://foldingathome.org/ -- http://members.chello.nl/hjgtuyl/tourdemonad.html Haskell programming --

Presumably, if we don't execute the argument of don't, we don't need to type-check it either. This suggests that, with -fdefer-type-errors -Wno-deferred-type-errors -Wno-deferred-out-of-scope-variables, `don't $` becomes a decent replacement for the `--` commenting operator, except that `don't` has the advantage of being indentation-aware in a `do` block. Perhaps with https://github.com/ghc-proposals/ghc-proposals/pull/216 https://github.com/ghc-proposals/ghc-proposals/pull/216, we can have `Not.do` introduce an indentation-aware block of comments. This would surely show off the power, elegance, and beauty of Haskell. Richard

On Apr 1, 2020, at 9:38 AM, Jack Kelly wrote:

Hello all,

I have taken over the maintainership of acme-dont, and am pleased to announce a new acme-dont release on Hackage[1].

acme-dont provides a `don't` function, which does not execute its argument. For example, the following code will not print anything:

import Acme.Dont (don't)

quiet :: IO () quiet = don't $ putStrLn "You'll never see this on stdout"

New in this release:

* `don't` has been generalised from `Monad` to `Applicative`. If you have been waiting since GHC 8.0.1's release in 2016[2] to use `don't` with `-XApplicativeDo`, wait no longer.

* A test suite, to ensure that `don't` does not do anything. Previous versions could have been defined as `don't = void` for all we knew.

Also, the acme-dont community now has a new home on sourcehut. On there, you can find the following invaluable resources:

* A source repository[3], to track further developement and new ways of not doing things, with a commit history reconstructed from the release tarballs uploaded to Hackage.

* A mailing list[4] for the acme-dont community to discuss the best ways of not doing things.

* A bug tracker[5] to handle reports, in case someone observes acme-dont doing something.

* Continuous integration[6], to ensure that acme-dont continues to not do things across multiple versions of GHC.

I would like to thank Gracjan Polak for uploading the initial releases of `acme-dont`, and for maintaining the package these past eleven years. I do not intend to betray the responsibility he has assigned me in handing over this critical package.

Best,

-- Jack

[1]: https://hackage.haskell.org/package/acme-dont-1.2 [2]: https://www.haskell.org/ghc/download_ghc_8_0_1 [3]: https://git.sr.ht/~jack/acme-dont [4]: https://lists.sr.ht/~jack/acme-dont-discuss [5]: https://todo.sr.ht/~jack/acme-dont [6]: https://builds.sr.ht/~jack/acme-dont _______________________________________________ Haskell-Cafe mailing list To (un)subscribe, modify options or view archives go to: http://mail.haskell.org/cgi-bin/mailman/listinfo/haskell-cafe Only members subscribed via the mailman list are allowed to post.