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Michel,</div>
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why are you using such an old version while reading the doc of a recent one? <br>
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<font size="3"><b>Thanks,</b></font></div>
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<font size="3"><b>Jason Hu</b></font></div>
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<font size="3"><b><a href="https://hustmphrrr.github.io/" style="">https://hustmphrrr.github.io/</a></b></font><br>
<font size="3"><b></b></font><font style="font-size:12pt" size="3"><span style="color: rgb(69, 129, 142);"><span style="font-family:trebuchet ms,sans-serif"><b><a target="_blank" style=""></a></b></span></span></font></div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Agda <agda-bounces@lists.chalmers.se> on behalf of Ulf Norell <ulf.norell@gmail.com><br>
<b>Sent:</b> March 23, 2020 5:49 PM<br>
<b>To:</b> Michel Levy <michel.levy.imag@free.fr><br>
<b>Cc:</b> Agda users <agda@lists.chalmers.se><br>
<b>Subject:</b> Re: [Agda] syntax declaration</font>
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<div>It should be</div>
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<div>syntax exists A (¦Ë x ¡ú P) = ex x ¡Ã A , P</div>
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<div>/ Ulf<br>
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<div dir="ltr" class="x_gmail_attr">On Mon, Mar 23, 2020 at 10:13 PM Michel Levy <<a href="mailto:michel.levy.imag@free.fr">michel.levy.imag@free.fr</a>> wrote:<br>
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Alas, the suggestion of Martin "syntax exists A P = ex x : A , P x"<br>
doesn't work.<br>
<br>
I still have the error : syntax must alternate holes and non-holes.<br>
<br>
And I get a lexical error when I replace the colon : by \:4<br>
<br>
I read<br>
"<a href="https://agda.readthedocs.io/en/v2.6.0/language/syntax-declarations.html" rel="noreferrer" target="_blank">https://agda.readthedocs.io/en/v2.6.0/language/syntax-declarations.html</a>"<br>
without finding the solution.<br>
<br>
Remark : I'm using agda version 2.5.3<br>
<br>
Le 23/03/2020 ¨¤ 18:19, Martin Escardo a ¨¦crit :<br>
> Also you will need to write<br>
><br>
> syntax exists A P = ex x : A , P x<br>
><br>
> without the round brackets, I think.<br>
><br>
> Martin<br>
><br>
><br>
> On 23/03/2020 17:18, Martin Escardo wrote:<br>
>> Use a different colon (:) symbol, such as the one you get by typing<br>
>> \:4 in emacs. I think the normal colon is reserved. Martin<br>
>><br>
>> On 23/03/2020 16:53, <a href="mailto:michel.levy.imag@free.fr" target="_blank">
michel.levy.imag@free.fr</a> wrote:<br>
>>> I made the following statement<br>
>>><br>
>>> data exists (A : Set)(P : A -> Set): Set where<br>
>>> <_,_> : (a : A) -> P a -> exists A P<br>
>>><br>
>>> I would like to rewrite (exists A P) as, for example, (ex (x : A) P<br>
>>> x).<br>
>>> But I don't understand how to do it. I tried :<br>
>>><br>
>>> syntax exists A P = ex (x : A) , P x<br>
>>><br>
>>> but I had the mistake : syntax must use holes exactly once<br>
>>><br>
>>> Can you explain to me how to use the syntax declaration on this<br>
>>> example ? What are these holes in my syntax statement ?<br>
>>><br>
>><br>
><br>
-- <br>
courriel : <a href="mailto:michel.levy.imag@free.fr" target="_blank">michel.levy.imag@free.fr</a><br>
mobile : 06 59 13 42 53<br>
web : <a href="http://michel.levy.imag.free.fr" rel="noreferrer" target="_blank">
michel.levy.imag.free.fr</a><br>
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