coq-club AT inria.fr

Subject: The Coq mailing list

List archive

Re: [Coq-Club] Agda is better

From: Sergey Goncharov <sergey.goncharov AT fau.de>
To: coq-club AT inria.fr
Subject: Re: [Coq-Club] Agda is better
Date: Fri, 17 Jan 2020 20:33:45 +0100
Authentication-results: mail2-smtp-roc.national.inria.fr; spf=None smtp.pra=sergey.goncharov AT fau.de; spf=Pass smtp.mailfrom=sergey.goncharov AT fau.de; spf=Pass smtp.helo=postmaster AT mx-rz-2.rrze.uni-erlangen.de
Ironport-phdr: 9a23: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

On 17/01/2020 20:06, Agda Guru wrote:

Agda is better

This looks like a start of a new amusing thread. I am willing to believe that Agda is better, but I would be happy if someone helps me to rationalize this subtle feeling, in particular by going beyond this list https://wiki.portal.chalmers.se/agda/pmwiki.php?n=Main.AgdaVsCoq

Let me start. Foundational issues aside, Agda seems to be better designed, as a programming language, in particular, as a recently learned:

1. In Agda one can reuse names of fields in records, while in Coq that yields an error:

Parameter X : Set.

Record some_record : Set :=
{
field_name : X
}.

Record some_other_record : Set :=
{
field_name : X
}.

----> "Error: field_name already exists."

Cheers,

--
PD Dr. Sergey Goncharov, Akademischer Oberrat

FAU Erlangen-Nürnberg Phone: +49-91-3185-64031
Chair for TCS Fax: +49-91-3185-64055
Martenstraße 3 Email:
Sergey.Goncharov AT cs.fau.de
D-91058 Erlangen Web: http://www8.cs.fau.de/~sergey

Attachment: smime.p7s
Description: S/MIME Cryptographic Signature

[Coq-Club] Agda is better, Agda Guru, 01/17/2020
- Re: [Coq-Club] Agda is better, Timothy Carstens, 01/17/2020
  - Re: [Coq-Club] Agda is better, Agda Guru, 01/17/2020
- Re: [Coq-Club] Agda is better, Sergey Goncharov, 01/17/2020
  - Re: [Coq-Club] Agda is better, Xuanrui Qi, 01/18/2020
    - Re: [Coq-Club] Agda is better, Sergey Goncharov, 01/18/2020
    - Message not available
      - Re: [Coq-Club] Agda is better, Xuanrui Qi, 01/18/2020
        
        Re: [Coq-Club] Agda is better, Kevin Sullivan, 01/18/2020