Suppress "Duplicate constraints" warning? - Glasgow-haskell-users - Haskell.org

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Suppress "Duplicate constraints" warning?

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Conal Elliott

30 Dec 2012 30 Dec '12

2:55 p.m.

Is there a way to suppress GHC's "Duplicate constraints" warning? I'm auto-generating some code, and it's a lot more convenient for me to leave the duplicates than filter them out. -- Conal

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Mario Blažević

31 Dec 31 Dec

10:25 a.m.

On 12-12-30 02:55 PM, Conal Elliott wrote:

Is there a way to suppress GHC's "Duplicate constraints" warning? I'm auto-generating some code, and it's a lot more convenient for me to leave the duplicates than filter them out.

I second the question. In my case the code is neither generated nor contains any literal duplicate constraints, but I'm still getting the warning.

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Simon Peyton-Jones

12:24 p.m.

| I second the question. In my case the code is neither generated nor | contains any literal duplicate constraints, but I'm still getting the | warning. If you think there's a bug (a warning for something that isn't true), by all means submit a bug report. Simon

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Simon Peyton-Jones

12:27 p.m.

Hmm. Actually there isn't a flag to suppress it, I'm afraid. Would you like me to add one? (It would be easy to do.) Simon From: glasgow-haskell-users-bounces@haskell.org [mailto:glasgow-haskell-users-bounces@haskell.org] On Behalf Of Conal Elliott Sent: 30 December 2012 19:56 To: glasgow-haskell-users@haskell.org Subject: Suppress "Duplicate constraints" warning? Is there a way to suppress GHC's "Duplicate constraints" warning? I'm auto-generating some code, and it's a lot more convenient for me to leave the duplicates than filter them out. -- Conal

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Conal Elliott

3 Jan 3 Jan

2:55 p.m.

Yes, please do add a flag to suppress this duplicate constraints warning, e.g., "-fno-warn-duplicate-constraints". Thanks! -- Conal On Mon, Dec 31, 2012 at 9:27 AM, Simon Peyton-Jones wrote:

Hmm. Actually there isn’t a flag to suppress it, I’m afraid. Would you like me to add one? (It would be easy to do.)****

Simon****

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*From:* glasgow-haskell-users-bounces@haskell.org [mailto: glasgow-haskell-users-bounces@haskell.org] *On Behalf Of *Conal Elliott *Sent:* 30 December 2012 19:56 *To:* glasgow-haskell-users@haskell.org *Subject:* Suppress "Duplicate constraints" warning?****

** **

Is there a way to suppress GHC's "Duplicate constraints" warning? I'm auto-generating some code, and it's a lot more convenient for me to leave the duplicates than filter them out.****

-- Conal****

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Conal Elliott

2:56 p.m.

Oh! I see it's already done. Thanks much! On Thu, Jan 3, 2013 at 11:55 AM, Conal Elliott wrote:

Yes, please do add a flag to suppress this duplicate constraints warning, e.g., "-fno-warn-duplicate-constraints".

Thanks! -- Conal

On Mon, Dec 31, 2012 at 9:27 AM, Simon Peyton-Jones
...
wrote:

...
Hmm. Actually there isn’t a flag to suppress it, I’m afraid. Would you like me to add one? (It would be easy to do.)****

Simon****

** **

*From:* glasgow-haskell-users-bounces@haskell.org [mailto: glasgow-haskell-users-bounces@haskell.org] *On Behalf Of *Conal Elliott *Sent:* 30 December 2012 19:56 *To:* glasgow-haskell-users@haskell.org *Subject:* Suppress "Duplicate constraints" warning?****

** **

Is there a way to suppress GHC's "Duplicate constraints" warning? I'm auto-generating some code, and it's a lot more convenient for me to leave the duplicates than filter them out.****

-- Conal****

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Conal Elliott
Mario Blažević
Simon Peyton-Jones