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Re: [Coq-Club] Avoiding some unfold with simpl


chronological Thread 
  • From: Alexandre Pilkiewicz <alexandre.pilkiewicz AT polytechnique.org>
  • To: Lauri Alanko <la AT iki.fi>
  • Cc: coq-club AT inria.fr
  • Subject: Re: [Coq-Club] Avoiding some unfold with simpl
  • Date: Thu, 28 Oct 2010 15:06:36 +0200
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Thanks to you and Mathieu for the trick !

To make it work in plain Coq, the notation should be

Notation "'nosimpl' t" := (let '(tt) := tt in t) (at level 10).

(let tt := tt in... does not work !)

Thanks again

Alexandre Pilkiewicz

2010/10/26 Lauri Alanko 
<la AT iki.fi>:
> On Tue, Oct 26, 2010 at 01:36:53PM +0200, Alexandre Pilkiewicz wrote:
>> I would like to declare some definitions to be not unfoldable by
>> simpl, so that it doesn't go "too far".
>> I tried "Opaque myconst.", but then, even unfold fails.
>>
>> I there a better way?
>
> The ssreflect extension provides some facilities for this. See
> <http://hal.inria.fr/docs/00/40/93/56/PDF/main.pdf>, Section 7.3.
>
> Cheers,
>
>
> Lauri
>



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