Hi, I vote "accept" as well. I'm a bit surprised by the subtlety, but the clarified semantics makes sense. Cheers, Sebastian ------ Originalnachricht ------ Von "Erik de Castro Lopo" <erikd@mega-nerd.com> An ghc-steering-committee@haskell.org Datum 17.10.2024 01:38:19 Betreff Re: [ghc-steering-committee] Please review #678: Amendment to ImportShadowing

Hi all,

I have recommended "accept" for this minor modification of this proposal.

I would appreciate it if everyone else on the committee would vote.

Thanks, Erik

Adam Gundry wrote:

...

Dear Committee,

Gergő Érdi proposes to amend his import shadowing proposal #652 to clarify the behaviour of module re-exports:

https://github.com/ghc-proposals/ghc-proposals/pull/678

I'd like to nominate Erik de Castro Lopo as the shepherd, as he shepherded the original proposal.

Please guide us to a conclusion as outlined in https://github.com/ghc-proposals/ghc-proposals#committee-process

Cheers,

Adam

-- Adam Gundry, Haskell Consultant Well-Typed LLP, https://www.well-typed.com/

Registered in England & Wales, OC335890 27 Old Gloucester Street, London WC1N 3AX, England

-- ---------------------------------------------------------------------- Erik de Castro Lopo http://www.mega-nerd.com/ _______________________________________________ ghc-steering-committee mailing list ghc-steering-committee@haskell.org https://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-steering-committee

I support, subject to a couple of typos I have identified. Simon On Thu, 17 Oct 2024 at 00:38, Erik de Castro Lopo <erikd@mega-nerd.com> wrote:

Hi all,

I have recommended "accept" for this minor modification of this proposal.

I would appreciate it if everyone else on the committee would vote.

Thanks, Erik

Adam Gundry wrote:

...

Dear Committee,

Gergő Érdi proposes to amend his import shadowing proposal #652 to clarify the behaviour of module re-exports:

https://github.com/ghc-proposals/ghc-proposals/pull/678

I'd like to nominate Erik de Castro Lopo as the shepherd, as he shepherded the original proposal.

Please guide us to a conclusion as outlined in https://github.com/ghc-proposals/ghc-proposals#committee-process

Cheers,

Adam

-- Adam Gundry, Haskell Consultant Well-Typed LLP, https://www.well-typed.com/

Registered in England & Wales, OC335890 27 Old Gloucester Street, London WC1N 3AX, England

-- ---------------------------------------------------------------------- Erik de Castro Lopo http://www.mega-nerd.com/ _______________________________________________ ghc-steering-committee mailing list ghc-steering-committee@haskell.org https://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-steering-committee

Seems like a reasonable amendment, I'm in support. On Fri, Oct 18, 2024 at 10:33 AM Malte Ott <malte.ott@maralorn.de> wrote:

I support as well.

On 2024-10-17 08:58, Simon Peyton Jones wrote:

...

I support, subject to a couple of typos I have identified.

Simon

On Thu, 17 Oct 2024 at 00:38, Erik de Castro Lopo <erikd@mega-nerd.com> wrote:

...

Hi all,

I have recommended "accept" for this minor modification of this proposal.

I would appreciate it if everyone else on the committee would vote.

Thanks, Erik

Adam Gundry wrote:

...

Dear Committee,

Gergő Érdi proposes to amend his import shadowing proposal #652 to clarify the behaviour of module re-exports:

https://github.com/ghc-proposals/ghc-proposals/pull/678

I'd like to nominate Erik de Castro Lopo as the shepherd, as he shepherded the original proposal.

Please guide us to a conclusion as outlined in https://github.com/ghc-proposals/ghc-proposals#committee-process

Cheers,

Adam

-- Adam Gundry, Haskell Consultant Well-Typed LLP, https://www.well-typed.com/

Registered in England & Wales, OC335890 27 Old Gloucester Street, London WC1N 3AX, England

-- ---------------------------------------------------------------------- Erik de Castro Lopo http://www.mega-nerd.com/ _______________________________________________ ghc-steering-committee mailing list ghc-steering-committee@haskell.org

https://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-steering-committee

...

...

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I find it a little annoying that this isn't backward compatible Me too. I outline on the Github a way to make it backward compatible. *Everyone*: do express a view there. Simon On Mon, 21 Oct 2024 at 03:50, Arnaud Spiwack <arnaud.spiwack@tweag.io> wrote:

I find it a little annoying that this isn't backward compatible. But on the other hand, it's a very obscure bit of Haskell semantics which is modified, module re-export is something that most people frequently get wrong anyway. At any rate, my feeling is that the proposed change is the right behaviour: if a module defines a function `foo`, and exports a *different* function `foo`, this is at least a smell, isn't it?

So, in favour.

On Fri, 18 Oct 2024 at 17:43, Jakob Brünker <jakob.bruenker@gmail.com> wrote:

...

Seems like a reasonable amendment, I'm in support.

On Fri, Oct 18, 2024 at 10:33 AM Malte Ott <malte.ott@maralorn.de> wrote:

...

I support as well.

On 2024-10-17 08:58, Simon Peyton Jones wrote:

...

I support, subject to a couple of typos I have identified.

Simon

On Thu, 17 Oct 2024 at 00:38, Erik de Castro Lopo <erikd@mega-nerd.com

wrote:

...

Hi all,

I have recommended "accept" for this minor modification of this proposal.

I would appreciate it if everyone else on the committee would vote.

Thanks, Erik

Adam Gundry wrote:

...

Dear Committee,

Gergő Érdi proposes to amend his import shadowing proposal #652 to clarify the behaviour of module re-exports:

https://github.com/ghc-proposals/ghc-proposals/pull/678

I'd like to nominate Erik de Castro Lopo as the shepherd, as he shepherded the original proposal.

Please guide us to a conclusion as outlined in https://github.com/ghc-proposals/ghc-proposals#committee-process

Cheers,

Adam

-- Adam Gundry, Haskell Consultant Well-Typed LLP, https://www.well-typed.com/

Registered in England & Wales, OC335890 27 Old Gloucester Street, London WC1N 3AX, England

--

---

...

...

Erik de Castro Lopo http://www.mega-nerd.com/ _______________________________________________ ghc-steering-committee mailing list ghc-steering-committee@haskell.org

https://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-steering-committee

...

...

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https://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-steering-committee

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-- Arnaud Spiwack Director, Research at https://moduscreate.com and https://tweag.io. _______________________________________________ ghc-steering-committee mailing list ghc-steering-committee@haskell.org https://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-steering-committee

we'd be well served by a better spec for what `module M` means in an export list,

Well, that's the entire purpose of this amendment! - Do you think it now gives a clear spec? - Do you prefer the alternative (more complicated, but backward compatible) spec I suggested here <https://github.com/ghc-proposals/ghc-proposals/pull/678#issuecomment-2421884753> ? Simon On Mon, 21 Oct 2024 at 09:27, Matthías Páll Gissurarson <mpg@mpg.is> wrote:

I'm in support. I agree with Simon's comment, we'd be well served by a better spec for what `module M` means in an export list, but this amendment is closer to what we would want.

On Mon, 21 Oct 2024 at 04:50, Arnaud Spiwack <arnaud.spiwack@tweag.io> wrote:

...

I find it a little annoying that this isn't backward compatible. But on the other hand, it's a very obscure bit of Haskell semantics which is modified, module re-export is something that most people frequently get wrong anyway. At any rate, my feeling is that the proposed change is the right behaviour: if a module defines a function `foo`, and exports a *different* function `foo`, this is at least a smell, isn't it?

So, in favour.

On Fri, 18 Oct 2024 at 17:43, Jakob Brünker <jakob.bruenker@gmail.com> wrote:

...

Seems like a reasonable amendment, I'm in support.

On Fri, Oct 18, 2024 at 10:33 AM Malte Ott <malte.ott@maralorn.de> wrote:

...

I support as well.

On 2024-10-17 08:58, Simon Peyton Jones wrote:

...

I support, subject to a couple of typos I have identified.

Simon

On Thu, 17 Oct 2024 at 00:38, Erik de Castro Lopo < erikd@mega-nerd.com> wrote:

...

Hi all,

I have recommended "accept" for this minor modification of this proposal.

I would appreciate it if everyone else on the committee would vote.

Thanks, Erik

Adam Gundry wrote:

> Dear Committee, > > Gergő Érdi proposes to amend his import shadowing proposal #652 to > clarify the behaviour of module re-exports: > > https://github.com/ghc-proposals/ghc-proposals/pull/678 > > I'd like to nominate Erik de Castro Lopo as the shepherd, as he > shepherded the original proposal. > > Please guide us to a conclusion as outlined in > https://github.com/ghc-proposals/ghc-proposals#committee-process > > Cheers, > > Adam > > > -- > Adam Gundry, Haskell Consultant > Well-Typed LLP, https://www.well-typed.com/ > > Registered in England & Wales, OC335890 > 27 Old Gloucester Street, London WC1N 3AX, England >

--

---

...

...

Erik de Castro Lopo http://www.mega-nerd.com/ _______________________________________________ ghc-steering-committee mailing list ghc-steering-committee@haskell.org

https://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-steering-committee

...

...

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_______________________________________________ ghc-steering-committee mailing list ghc-steering-committee@haskell.org https://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-steering-committee

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-- Arnaud Spiwack Director, Research at https://moduscreate.com and https://tweag.io. _______________________________________________ ghc-steering-committee mailing list ghc-steering-committee@haskell.org https://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-steering-committee

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I would like to hear back from the proposal author. If he's willing to incorporate Simon's spec, I would be very happy. I still accept the proposal as-is in the interest of making progress. Am Mo., 21. Okt. 2024 um 11:40 Uhr schrieb Matthías Páll Gissurarson < mpg@mpg.is>:

I’m in favor of the backward compatible one, it’s a bit more complicated but (I think) clearer. I’ve left some comments on the PR itself.

/Matti Palli

On Mon, Oct 21, 2024 at 10:48 Simon Peyton Jones < simon.peytonjones@gmail.com> wrote:

...

...

we'd be well served by a better spec for what `module M` means in an export list,

Well, that's the entire purpose of this amendment!

- Do you think it now gives a clear spec? - Do you prefer the alternative (more complicated, but backward compatible) spec I suggested here <https://github.com/ghc-proposals/ghc-proposals/pull/678#issuecomment-2421884753> ?

Simon

On Mon, 21 Oct 2024 at 09:27, Matthías Páll Gissurarson <mpg@mpg.is> wrote:

...

I'm in support. I agree with Simon's comment, we'd be well served by a better spec for what `module M` means in an export list, but this amendment is closer to what we would want.

On Mon, 21 Oct 2024 at 04:50, Arnaud Spiwack <arnaud.spiwack@tweag.io> wrote:

...

I find it a little annoying that this isn't backward compatible. But on the other hand, it's a very obscure bit of Haskell semantics which is modified, module re-export is something that most people frequently get wrong anyway. At any rate, my feeling is that the proposed change is the right behaviour: if a module defines a function `foo`, and exports a *different* function `foo`, this is at least a smell, isn't it?

So, in favour.

On Fri, 18 Oct 2024 at 17:43, Jakob Brünker <jakob.bruenker@gmail.com> wrote:

...

Seems like a reasonable amendment, I'm in support.

On Fri, Oct 18, 2024 at 10:33 AM Malte Ott <malte.ott@maralorn.de> wrote:

...

I support as well.

On 2024-10-17 08:58, Simon Peyton Jones wrote: > I support, subject to a couple of typos I have identified. > > Simon > > On Thu, 17 Oct 2024 at 00:38, Erik de Castro Lopo < erikd@mega-nerd.com> > wrote: > > > Hi all, > > > > I have recommended "accept" for this minor modification of this proposal. > > > > I would appreciate it if everyone else on the committee would vote. > > > > Thanks, > > Erik > > > > > > Adam Gundry wrote: > > > > > Dear Committee, > > > > > > Gergő Érdi proposes to amend his import shadowing proposal #652 to > > > clarify the behaviour of module re-exports: > > > > > > https://github.com/ghc-proposals/ghc-proposals/pull/678 > > > > > > I'd like to nominate Erik de Castro Lopo as the shepherd, as he > > > shepherded the original proposal. > > > > > > Please guide us to a conclusion as outlined in > > > https://github.com/ghc-proposals/ghc-proposals#committee-process > > > > > > Cheers, > > > > > > Adam > > > > > > > > > -- > > > Adam Gundry, Haskell Consultant > > > Well-Typed LLP, https://www.well-typed.com/ > > > > > > Registered in England & Wales, OC335890 > > > 27 Old Gloucester Street, London WC1N 3AX, England <https://www.google.com/maps/search/27+Old+Gloucester+Street,+London+WC1N+3AX,+England?entry=gmail&source=g> > > > > > > > > > -- > > ---------------------------------------------------------------------- > > Erik de Castro Lopo > > http://www.mega-nerd.com/ > > _______________________________________________ > > ghc-steering-committee mailing list > > ghc-steering-committee@haskell.org > > https://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-steering-committee > >

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Erik, this is an old one but I think you're still the shepherd? On Thu, 25 Jun 2026, 10:32 Simon Marlow, <marlowsd@gmail.com> wrote:

+1

I updated the proposal status on github as it was still "pending shepherd recommendation".

On Thu, 17 Oct 2024 at 00:38, Erik de Castro Lopo <erikd@mega-nerd.com> wrote:

...

Hi all,

I have recommended "accept" for this minor modification of this proposal.

I would appreciate it if everyone else on the committee would vote.

Thanks, Erik

Adam Gundry wrote:

...

Dear Committee,

Gergő Érdi proposes to amend his import shadowing proposal #652 to clarify the behaviour of module re-exports:

https://github.com/ghc-proposals/ghc-proposals/pull/678

I'd like to nominate Erik de Castro Lopo as the shepherd, as he shepherded the original proposal.

Please guide us to a conclusion as outlined in https://github.com/ghc-proposals/ghc-proposals#committee-process

Cheers,

Adam

-- Adam Gundry, Haskell Consultant Well-Typed LLP, https://www.well-typed.com/

Registered in England & Wales, OC335890 27 Old Gloucester Street, London WC1N 3AX, England

-- ---------------------------------------------------------------------- Erik de Castro Lopo http://www.mega-nerd.com/ _______________________________________________ ghc-steering-committee mailing list ghc-steering-committee@haskell.org https://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-steering-committee

The ammendment looks good to me. The semantics stay as previously intended but are worded more precisely in regards to the report. Best, Malte On 2026-06-07 23:00, Adam Gundry wrote:

Gergo has now revised the proposed amendment, so please take another look. I think it looks good to accept modulo Simon's polishing suggestions.

Adam

On 04/10/2024 08:58, Adam Gundry wrote:

...

Dear Committee,

Gergő Érdi proposes to amend his import shadowing proposal #652 to clarify the behaviour of module re-exports:

https://github.com/ghc-proposals/ghc-proposals/pull/678

I'd like to nominate Erik de Castro Lopo as the shepherd, as he shepherded the original proposal.

Please guide us to a conclusion as outlined in https://github.com/ghc-proposals/ghc-proposals#committee-process

Cheers,

Adam

-- Adam Gundry, Haskell Consultant Well-Typed LLP, https://www.well-typed.com/

Registered in England & Wales, OC335890 27 Old Gloucester Street, London WC1N 3AX, England

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+1 from me as well.

On 15 Jun 2026, at 07:54, Sebastian Graf <sgraf1337@gmail.com> wrote:

+1 from me.

Am Fr., 12. Juni 2026 um 00:26 Uhr schrieb Malte Ott <malte.ott@maralorn.de <mailto:malte.ott@maralorn.de>>:

...

The ammendment looks good to me. The semantics stay as previously intended but are worded more precisely in regards to the report.

Best, Malte

On 2026-06-07 23:00, Adam Gundry wrote:

...

Gergo has now revised the proposed amendment, so please take another look. I think it looks good to accept modulo Simon's polishing suggestions.

Adam

On 04/10/2024 08:58, Adam Gundry wrote:

...

Dear Committee,

Gergő Érdi proposes to amend his import shadowing proposal #652 to clarify the behaviour of module re-exports:

https://github.com/ghc-proposals/ghc-proposals/pull/678

I'd like to nominate Erik de Castro Lopo as the shepherd, as he shepherded the original proposal.

Please guide us to a conclusion as outlined in https://github.com/ghc-proposals/ghc-proposals#committee-process

Cheers,

Adam

-- Adam Gundry, Haskell Consultant Well-Typed LLP, https://www.well-typed.com/

Registered in England & Wales, OC335890 27 Old Gloucester Street, London WC1N 3AX, England

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