Received: (at 61368) by debbugs.gnu.org; 15 Jan 2024 11:41:06 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Mon Jan 15 06:41:05 2024 Received: from localhost ([127.0.0.1]:44818 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1rPLKz-0003Mt-IN for submit <at> debbugs.gnu.org; Mon, 15 Jan 2024 06:41:05 -0500 Received: from mail-lj1-x235.google.com ([2a00:1450:4864:20::235]:60448) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <joaotavora@HIDDEN>) id 1rPLKx-0003MF-8t for 61368 <at> debbugs.gnu.org; Mon, 15 Jan 2024 06:41:03 -0500 Received: by mail-lj1-x235.google.com with SMTP id 38308e7fff4ca-2ccec119587so105020141fa.0 for <61368 <at> debbugs.gnu.org>; Mon, 15 Jan 2024 03:41:03 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1705318857; x=1705923657; darn=debbugs.gnu.org; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=p4VRGFP0iYG5v3/0Y7lTCdnDAjEbav7Z4k+X7jG1vGo=; b=N8sDjSeNmvc6/9SBCncAjk+uhQ7x0FgjGhBNo+zbTqdkSrvci3uz4Pkw9wqY2bchfg hcvUD6Ybpd4pZ6LCzE4wWquKIoNli/2mv4Py0EW/KnU3rVo1PSbsII2zSvDPODMujmP5 s526Sx92ix2uB5waVIOBx64d/ZK4c/Sv3TSyyhk7CTCAvVauiBLg+Fnd2nLHKYz1HoN6 +0qNvWChQd7vBV2/SO+m5/7TA1CtPWcK2cFs0zQWP71fZbMKPKkwzctBzn8O5gpyNA88 kzTXGWOHz0GCskN7t9TuQ9x/Y/c9VNm0dkaeq7uZiMOlInrNTjKoefeCHeO/HudHY0Z3 6eKA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1705318857; x=1705923657; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=p4VRGFP0iYG5v3/0Y7lTCdnDAjEbav7Z4k+X7jG1vGo=; b=aK09zLT5tGPueJLlvld42+dsu6JUS9XaEh80UBIq1XxaXrSnKI50qY5q8F/IVqVGUX 7prCvsF8pPpBdyDE7p115Gd7wveyGRsIvI4zCmvw1NIH3XJasWD1pPopOk4zI2rnC9YJ H/bh1MhFOphVtneJgauYTG9s3Ely4lbtNN5fflDw0nRIz3ghyppoRAyXb2iSsOATzfNC wtLHCmB/Yw2Nz61978hmbrg9Ix19WLyYj7nSHJ4kvjyMajFFjSbAyPIRwGCZ3CutG9qh BsL/JGz2/mrUpfpkzItvUjuUGLS6db8rMhM7bZFoYPDKKP8Crehd8wiehYUhtLhFFoc1 Px2A== X-Gm-Message-State: AOJu0YxZY+lPaDIxEPtSDFZJUqvGAyyqwzoAc5Hvc6UGdaanT2mInXvr 6C1Die8Q6xHkU8ZeN9ISsoEdwQ4I7jhlNUIYdqs= X-Google-Smtp-Source: AGHT+IEDpMEFU+rle/U74z+YLwI6bP/KwSxzEi8a6i6XAxVC04MN4nPXar4jAhWaom70aFAoHGjilY2LSP1HH18KKdo= X-Received: by 2002:a05:651c:104d:b0:2cd:46c2:774 with SMTP id x13-20020a05651c104d00b002cd46c20774mr2610912ljm.97.1705318857211; Mon, 15 Jan 2024 03:40:57 -0800 (PST) MIME-Version: 1.0 References: <CAMCrgaUgMx9+0Q8f_cezZ0TW_-u=mdeHf=TL=qw9wbhiS-nJ9w@HIDDEN> <83edr0nmq6.fsf@HIDDEN> <CAMCrgaUa26s2BM8EskKt5FTEyFqyioqx13abOFSMjcyShgG=Pg@HIDDEN> <83357flzys.fsf@HIDDEN> <CAMCrgaVHtNZ6vAyTfxdfXQYmE8TKQHJK-wKoc78YcF=eCygyTQ@HIDDEN> <CALDnm53sBt-o8txJ7ToZsA3BaFzYUVtnMLzPKz8wf0jKUROQPA@HIDDEN> <CAMCrgaWnYpHby+Kn2khq3OX2b80hbwgqXKmKa-MmpLS3q1xhyQ@HIDDEN> <83o7pov6li.fsf@HIDDEN> <CAMCrgaXeCmPNpEDkuO_zM_sxrSnD1VsruWyQ=HHiw8JOyvVj_A@HIDDEN> <CADwFkmnWoW=YFd_vuQ3+0cxftr06XKrFVZA2FbfYgYv+cwe08g@HIDDEN> <CAMCrgaWoX9vu4tAU7rbO9QjLjnz30O7JK6kANWsAaUjAhTsdQw@HIDDEN> <87ttnfvvmi.fsf@HIDDEN> In-Reply-To: <87ttnfvvmi.fsf@HIDDEN> From: =?UTF-8?B?Sm/Do28gVMOhdm9yYQ==?= <joaotavora@HIDDEN> Date: Mon, 15 Jan 2024 11:40:45 +0000 Message-ID: <CALDnm51EjBEJiRS1kfDgDs0xvwAj=q+YGTNjx62YhXzj71Vphw@HIDDEN> Subject: Re: bug#61368: [PATCH] Extend go-ts-mode with support for pre-filling return statements To: Theodor Thornhill <theo@HIDDEN> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Spam-Score: -0.0 (/) X-Debbugs-Envelope-To: 61368 Cc: Evgeni Kolev <evgenysw@HIDDEN>, Eli Zaretskii <eliz@HIDDEN>, 61368 <at> debbugs.gnu.org, Stefan Kangas <stefankangas@HIDDEN>, dev@HIDDEN X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.0 (-) On Mon, Jan 15, 2024 at 8:39=E2=80=AFAM Theodor Thornhill <theo@HIDDEN= o> wrote: > > Evgeni Kolev <evgenysw@HIDDEN> writes: > > > On Thu, Jan 11, 2024 at 12:43=E2=80=AFAM Stefan Kangas <stefankangas@gm= ail.com> wrote: > >> > >> Evgeni Kolev <evgenysw@HIDDEN> writes: > >> > >> > Thank you, makes sense. I'll think about the different options and > >> > come up with a proposal. > >> > >> Did you make any progress here? > > > > I have since come across tempo.el and reviewed its use in org-tempo.el. > > > > While tempo.el is a valid option, I still think yasnippet is a better a= pproach. > > However, yasnippet is still not used throughout emacs' core (other > > than "light" uses > > in eglot.el and python.el, and some faces in the themes). > > > > Please let me know in case a generic mechanism for adding snippets to m= ajor > > modes has been added - I might have missed it. > > Perhaps it's time to revisit the snippet.el that Joao has mentioned? I've cleaned it up very minimally and put the most recent version here https://github.com/joaotavora/snippet It has unit tests which you can run with /path/to/emacs -Q --batch -l snippet-tests.el -f ert-run-tests-batch-and-ex= it Not many docs docs, some docstrings, many TODOs. Have a look.
bug-gnu-emacs@HIDDEN:bug#61368; Package emacs.
Full text available.Received: (at 61368) by debbugs.gnu.org; 15 Jan 2024 08:39:11 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Mon Jan 15 03:39:11 2024 Received: from localhost ([127.0.0.1]:44660 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1rPIUw-0000Ev-NZ for submit <at> debbugs.gnu.org; Mon, 15 Jan 2024 03:39:10 -0500 Received: from out-173.mta0.migadu.com ([91.218.175.173]:12192) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <theo@HIDDEN>) id 1rPIUu-0000Ek-HP for 61368 <at> debbugs.gnu.org; Mon, 15 Jan 2024 03:39:09 -0500 X-Report-Abuse: Please report any abuse attempt to abuse@HIDDEN and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=thornhill.no; s=key1; t=1705307945; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=MhGo9RM/tj7NDEhZI0VxnTyVHsLyoh3VH2eXcqe2qfo=; b=ZP1XRvBVJ95r14kVAIJNzYsCGgwmid1celSP9I9JfXpwBXpXr65udZ3MLoIuD6Vah4ytCi TkIdMDq8+tbQfAzwm0VFDY0KT627ts3URHnsa9Hq3vVf6DejLrF4gIgng3N+hyHmHKC/3J 9wpsLQF9uMk+0PPD0xXHi+pGpE8HJ6waNlTECcXD5QPkMxRCMLdxgyQ1ycpKediwKMpfwq rvsSz+CXd4MKBvhjlEtAxhoGTOnHlLusqbAa2m0uPQH/T3ir5YWvZwGUHxES6m3Joxwc0q 9AyscYTvvgd/xYC0i8+exG+EdudB3eNEVzwp0y0lBsiullB28a/6Nd+HU/n6kQ== From: Theodor Thornhill <theo@HIDDEN> To: Evgeni Kolev <evgenysw@HIDDEN>, Stefan Kangas <stefankangas@HIDDEN> Subject: Re: bug#61368: [PATCH] Extend go-ts-mode with support for pre-filling return statements In-Reply-To: <CAMCrgaWoX9vu4tAU7rbO9QjLjnz30O7JK6kANWsAaUjAhTsdQw@HIDDEN> References: <CAMCrgaUgMx9+0Q8f_cezZ0TW_-u=mdeHf=TL=qw9wbhiS-nJ9w@HIDDEN> <83edr0nmq6.fsf@HIDDEN> <CAMCrgaUa26s2BM8EskKt5FTEyFqyioqx13abOFSMjcyShgG=Pg@HIDDEN> <83357flzys.fsf@HIDDEN> <CAMCrgaVHtNZ6vAyTfxdfXQYmE8TKQHJK-wKoc78YcF=eCygyTQ@HIDDEN> <CALDnm53sBt-o8txJ7ToZsA3BaFzYUVtnMLzPKz8wf0jKUROQPA@HIDDEN> <CAMCrgaWnYpHby+Kn2khq3OX2b80hbwgqXKmKa-MmpLS3q1xhyQ@HIDDEN> <83o7pov6li.fsf@HIDDEN> <CAMCrgaXeCmPNpEDkuO_zM_sxrSnD1VsruWyQ=HHiw8JOyvVj_A@HIDDEN> <CADwFkmnWoW=YFd_vuQ3+0cxftr06XKrFVZA2FbfYgYv+cwe08g@HIDDEN> <CAMCrgaWoX9vu4tAU7rbO9QjLjnz30O7JK6kANWsAaUjAhTsdQw@HIDDEN> Date: Mon, 15 Jan 2024 09:39:01 +0100 Message-ID: <87ttnfvvmi.fsf@HIDDEN> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Migadu-Flow: FLOW_OUT X-Spam-Score: -0.0 (/) X-Debbugs-Envelope-To: 61368 Cc: dev@HIDDEN, Eli Zaretskii <eliz@HIDDEN>, joaotavora@HIDDEN, 61368 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.0 (-) Evgeni Kolev <evgenysw@HIDDEN> writes: > On Thu, Jan 11, 2024 at 12:43=E2=80=AFAM Stefan Kangas <stefankangas@gmai= l.com> wrote: >> >> Evgeni Kolev <evgenysw@HIDDEN> writes: >> >> > Thank you, makes sense. I'll think about the different options and >> > come up with a proposal. >> >> Did you make any progress here? > > I have since come across tempo.el and reviewed its use in org-tempo.el. > > While tempo.el is a valid option, I still think yasnippet is a better app= roach. > However, yasnippet is still not used throughout emacs' core (other > than "light" uses > in eglot.el and python.el, and some faces in the themes). > > Please let me know in case a generic mechanism for adding snippets to maj= or > modes has been added - I might have missed it. Perhaps it's time to revisit the snippet.el that Joao has mentioned? Theo
bug-gnu-emacs@HIDDEN:bug#61368; Package emacs.
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I'll think about the different options and > > come up with a proposal. > > Did you make any progress here? I have since come across tempo.el and reviewed its use in org-tempo.el. While tempo.el is a valid option, I still think yasnippet is a better appro= ach. However, yasnippet is still not used throughout emacs' core (other than "light" uses in eglot.el and python.el, and some faces in the themes). Please let me know in case a generic mechanism for adding snippets to major modes has been added - I might have missed it.
bug-gnu-emacs@HIDDEN:bug#61368; Package emacs.
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bug-gnu-emacs@HIDDEN:bug#61368; Package emacs.
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bug-gnu-emacs@HIDDEN:bug#61368; Package emacs.
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Date: Mon, 20 Feb 2023 14:55:53 +0200
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From: Eli Zaretskii <eliz@HIDDEN>
To: Evgeni Kolev <evgenysw@HIDDEN>
In-Reply-To: <CAMCrgaWnYpHby+Kn2khq3OX2b80hbwgqXKmKa-MmpLS3q1xhyQ@HIDDEN>
(message from Evgeni Kolev on Mon, 20 Feb 2023 10:54:06 +0200)
Subject: Re: bug#61368: [PATCH] Extend go-ts-mode with support for pre-filling
return statements
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> From: Evgeni Kolev <evgenysw@HIDDEN>
> Date: Mon, 20 Feb 2023 10:54:06 +0200
> Cc: 61368 <at> debbugs.gnu.org, Randy Taylor <dev@HIDDEN>,
> Theodor Thornhill <theo@HIDDEN>
>
> Thank you João for the input! I think something like this would make
> sense in go-ts-mode.el:
> ```
> (with-eval-after-load 'yasnippet
> (yas-define-snippets 'go-ts-mode
> '(("return" (yas-expand-snippet
> (go-ts-mode-return)))
> ("iferr" (yas-expand-snippet
> (format "if err != nil {\n%s\n}"
> (go-ts-mode-return)))))))
> ```
>
> A custom variable go-ts-mode-want-yasnippet could be added to
> optionally prevent adding the snippets.
>
> Eli, would you consider something like the code above acceptable as an
> alternative to an electric "return" mode?
>
> Having optional yasnippet integration was also brought up by Theo in
> this message[1] and this one [2].
>
> [1]: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=60805#11
> [2]: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=60805#17
IMO, if we are going to support yasnippet, we should do it in more
than just one mode. So a short addition to just the go-ts-mode will
not do, and if we want to include stuff like that, it should be part
of a larger patch for Emacs 30. Whether this is a good alternative
for some electricity is also a good topic for discussion: electric is
part of Emacs whereas yasnippet isn't, so there are advantages and
disadvantages to this proposal.
Thanks.
bug-gnu-emacs@HIDDEN:bug#61368; Package emacs.
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From: Evgeni Kolev <evgenysw@HIDDEN>
Date: Mon, 20 Feb 2023 10:54:06 +0200
Message-ID: <CAMCrgaWnYpHby+Kn2khq3OX2b80hbwgqXKmKa-MmpLS3q1xhyQ@HIDDEN>
Subject: Re: bug#61368: [PATCH] Extend go-ts-mode with support for pre-filling
return statements
To: =?UTF-8?B?Sm/Do28gVMOhdm9yYQ==?= <joaotavora@HIDDEN>,
Eli Zaretskii <eliz@HIDDEN>
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Thank you Jo=C3=A3o for the input! I think something like this would make
sense in go-ts-mode.el:
```
(with-eval-after-load 'yasnippet
(yas-define-snippets 'go-ts-mode
'(("return" (yas-expand-snippet
(go-ts-mode-return)))
("iferr" (yas-expand-snippet
(format "if err !=3D nil {\n%s\n}"
(go-ts-mode-return)))))))
```
A custom variable go-ts-mode-want-yasnippet could be added to
optionally prevent adding the snippets.
Eli, would you consider something like the code above acceptable as an
alternative to an electric "return" mode?
Having optional yasnippet integration was also brought up by Theo in
this message[1] and this one [2].
[1]: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D60805#11
[2]: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D60805#17
bug-gnu-emacs@HIDDEN:bug#61368; Package emacs.
Full text available.Received: (at 61368) by debbugs.gnu.org; 18 Feb 2023 12:15:06 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sat Feb 18 07:15:06 2023 Received: from localhost ([127.0.0.1]:42722 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1pTM7O-00027X-8e for submit <at> debbugs.gnu.org; Sat, 18 Feb 2023 07:15:06 -0500 Received: from mail-oi1-f174.google.com ([209.85.167.174]:35579) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <joaotavora@HIDDEN>) id 1pTM7M-00026l-PQ for 61368 <at> debbugs.gnu.org; Sat, 18 Feb 2023 07:15:05 -0500 Received: by mail-oi1-f174.google.com with SMTP id bp9so1349733oib.2 for <61368 <at> debbugs.gnu.org>; Sat, 18 Feb 2023 04:15:04 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:from:to:cc:subject:date:message-id:reply-to; bh=w5EJA5zRniAjz5Wyb1cPrSgJCoM5U413AjH5fAql5Tc=; b=dqMEZzyS2LH+RK+oREuM0NSNeJ0sMX3/wrsOVinlCoGK77nKqCzS14zG5Bbg5gjV3v NkpD8aHmfaU4l68Y+YIbjDLiV3k4mPkE1gMkBDrBAZ/nByFAMSwypXo5fhlptc9o0vfI ylWfE9nvg/DI1xsFh8yJv0VpNoERonTNNCtkEcbprHB1WERWyDN2yU2Z4UWRMtXVXZXM +n80kuvStURAMqaenCj/SviRSMOT9w/JSH5aFaPiDZysPpIfO6f6rURrihs1ILCQROMS TFiUBssQoOksxgNui1ps3vkqLFojdXR7xcTMWWELY5SCLwx5ME6yBuVKC6eegSnHpP3/ fz6A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=w5EJA5zRniAjz5Wyb1cPrSgJCoM5U413AjH5fAql5Tc=; b=Hll+2COSTIZknaG9X3gt4WoxLKEI/5uWWYLQpr7srmJPJ3xWDR2SWfvkxMPHOw38Sq Lh9FUVyiKCzbJSyrqhiAMJocd/m0cwk4ANHJJ+bJl4u7mmQHdY0N1s+apPe93kxrQg87 Msy8SIL5s6x7bcxxNSbH9q+jtRnCSt3z6nzZVN5/XePPhqs3RxgwiPhVr4ct8hEkEfFY K96KZ4L/STCQKWibo51onqdNdc5aTu4RN5RWgxpcCm8jHG2V1Mq2ujJAT5RciOa32wyQ 2PzUR4YkZj3BByf0oFxmxqgrbornjdz/f+rCg6sB2DlLanGjLhe26v+EdSCwLsZZVd2C aaeA== X-Gm-Message-State: AO0yUKUUAUYEuowgLZwT/F1VNP7+6uKiv0MtxPkyE0ilxVXldoxYLttu G8X5TmQJFediVdgzaotuWPwsqgWS515Puegy2+M= X-Google-Smtp-Source: AK7set9hnKBJABGKy5s+KYhWPUu4yjjyvYTJxFH82g5+yyLAQaVgFh5qkosh5PKFVaWOmtMGPr0Sep5XSO/NhqfYyJw= X-Received: by 2002:a05:6808:128b:b0:37b:9a3:136f with SMTP id a11-20020a056808128b00b0037b09a3136fmr11801oiw.6.1676722499126; Sat, 18 Feb 2023 04:14:59 -0800 (PST) MIME-Version: 1.0 References: <CAMCrgaUgMx9+0Q8f_cezZ0TW_-u=mdeHf=TL=qw9wbhiS-nJ9w@HIDDEN> <83edr0nmq6.fsf@HIDDEN> <CAMCrgaUa26s2BM8EskKt5FTEyFqyioqx13abOFSMjcyShgG=Pg@HIDDEN> <83357flzys.fsf@HIDDEN> <CAMCrgaVHtNZ6vAyTfxdfXQYmE8TKQHJK-wKoc78YcF=eCygyTQ@HIDDEN> In-Reply-To: <CAMCrgaVHtNZ6vAyTfxdfXQYmE8TKQHJK-wKoc78YcF=eCygyTQ@HIDDEN> From: =?UTF-8?B?Sm/Do28gVMOhdm9yYQ==?= <joaotavora@HIDDEN> Date: Sat, 18 Feb 2023 12:14:49 +0000 Message-ID: <CALDnm53sBt-o8txJ7ToZsA3BaFzYUVtnMLzPKz8wf0jKUROQPA@HIDDEN> Subject: Re: bug#61368: [PATCH] Extend go-ts-mode with support for pre-filling return statements To: Evgeni Kolev <evgenysw@HIDDEN> Content-Type: multipart/alternative; boundary="000000000000f28c7d05f4f860df" X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: 61368 Cc: Randy Taylor <dev@HIDDEN>, Eli Zaretskii <eliz@HIDDEN>, Theodor Thornhill <theo@HIDDEN>, 61368 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.0 (-) --000000000000f28c7d05f4f860df Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Sat, Feb 18, 2023, 11:46 Evgeni Kolev <evgenysw@HIDDEN> wrote: > + Jo=C3=A3o, author of yasnippet. > > Hi, Jo=C3=A3o, I'd appreciate any suggestions you might have. I'm aiming = to > extend go-ts-mode with a snippet-like feature. go-ts-mode would be > able to insert a "smart / context-aware" return statement. My question > is - is there a way for major modes to provide yasnippet snippets? My > understanding is the snippets are either created by each user > individually, or distributed as a collection of snippets (e.g. > yasnippet-snippets). Snippets can be distributed as files, but that's not a very good way as I see it today. One of the reasons might be too leverage the TAB and menu expansion of the yasnippet system. But probably you don't want this, and snippets can also be defined programmatically, albeit not with a beautiful language. Are there any major modes which provide snippets > (I wasn't able to find any in emacs' repo)? > That's because yasnippet is not part of the Emacs repo proper, i.e. the "core". So adding snippets to major modes in the core would introduce into the core a dependency on an non-core ELPA package. Nevertheless, there are ways to conditionally provide functionality based on whether the non-core package is detected. A soft dependency. In my opinion it makes sense for popular non-core packages: company, markdown-mode, yasnippet, etc. Look at Eglot, for example. Jo=C3=A3o Jo=C3=A3o --000000000000f28c7d05f4f860df Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable <div dir=3D"auto"><div><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D= "gmail_attr">On Sat, Feb 18, 2023, 11:46 Evgeni Kolev <<a href=3D"mailto= :evgenysw@HIDDEN">evgenysw@HIDDEN</a>> wrote:<br></div><blockquote= class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc soli= d;padding-left:1ex">+ Jo=C3=A3o, author of yasnippet.<br> <br> Hi, Jo=C3=A3o, I'd appreciate any suggestions you might have. I'm a= iming to<br> extend go-ts-mode with a snippet-like feature. go-ts-mode would be<br> able to insert a "smart / context-aware" return statement. My que= stion<br> is - is there a way for major modes to provide yasnippet snippets? My<br> understanding is the snippets are either created by each user<br> individually, or distributed as a collection of snippets (e.g.<br> yasnippet-snippets).</blockquote></div></div><div dir=3D"auto"><br></div><d= iv dir=3D"auto">Snippets can be distributed as files, but that's not a = very good way as I see it today. One of the=C2=A0 reasons might be too leve= rage the TAB and menu expansion of the yasnippet system. But probably you d= on't want this, and snippets can also be defined programmatically, albe= it not with a beautiful language.=C2=A0</div><div dir=3D"auto"><br></div><d= iv dir=3D"auto"><div class=3D"gmail_quote"><blockquote class=3D"gmail_quote= " style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">A= re there any major modes which provide snippets<br> (I wasn't able to find any in emacs' repo)?<br></blockquote></div><= /div><div dir=3D"auto"><br></div><div dir=3D"auto">That's because yasni= ppet is not part of the Emacs repo proper, i.e. the "core". So ad= ding snippets to major modes in the core would introduce into the core a de= pendency on an non-core ELPA package.</div><div dir=3D"auto"><br></div><div= dir=3D"auto">Nevertheless, there are ways to conditionally provide functio= nality based on whether the non-core package is detected.=C2=A0 A soft depe= ndency. In my opinion it makes sense for popular non-core packages: company= , markdown-mode, yasnippet, etc. Look at Eglot, for example.</div><div dir= =3D"auto"><br></div><div dir=3D"auto">Jo=C3=A3o</div><div dir=3D"auto"><br>= </div><div dir=3D"auto">Jo=C3=A3o</div></div> --000000000000f28c7d05f4f860df--
bug-gnu-emacs@HIDDEN:bug#61368; Package emacs.
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Hi, Jo=C3=A3o, I'd appreciate any suggestions you might have. I'm aiming to extend go-ts-mode with a snippet-like feature. go-ts-mode would be able to insert a "smart / context-aware" return statement. My question is - is there a way for major modes to provide yasnippet snippets? My understanding is the snippets are either created by each user individually, or distributed as a collection of snippets (e.g. yasnippet-snippets). Are there any major modes which provide snippets (I wasn't able to find any in emacs' repo)? On Thu, Feb 9, 2023 at 3:40 PM Eli Zaretskii <eliz@HIDDEN> wrote: > > Makes sense. I am familiar with electric-pair-mode. I see that it adds > > a hook in post-self-insert-hook. Is your suggestion to do something > > like this: > > - add hook in post-self-insert-hook > > - in the hook check if RET is typed after an "return" > > - if yes, replace the "return" with the "context-aware return > > statement", possibly using (yas-expand-snippet) > > Yes, something like that. See electric.el for more examples. > > Electric modes are usually minor modes that let major modes customize > them by setting variables. Again, I think you will find examples in > electric.el. The attached patch now adds a (go-ts-electric-return-mode) which, when enabled, replaces "return RET" with a context-aware return statement. I used sh-script.el's (sh-electric-here-document-mode) as an example. I'm concerned this electric mode can turn out to be too aggressive/surprising for the user - "return RET" is a common text to be entered, I'm not sure the user would always want it to be replaced. For example, when debugging I might insert return statements all over the place. Put differently, I would be more comfortable if there's a distinct mechanism to trigger the context-aware return, for example with a trigger key like when a snippet is inserted. --0000000000003611f805f4f7fb5f Content-Type: application/octet-stream; name="0001-Extend-go-ts-mode-with-support-for-pre-filling-retur.patch" Content-Disposition: attachment; filename="0001-Extend-go-ts-mode-with-support-for-pre-filling-retur.patch" Content-Transfer-Encoding: base64 Content-ID: <f_le9vhjq30> X-Attachment-Id: f_le9vhjq30 RnJvbSAzZWZhYTcxM2FjOWZkY2I0NTA3ZTk0NWMyZGI3NzFmN2JiM2ExYmU2IE1vbiBTZXAgMTcg MDA6MDA6MDAgMjAwMQpGcm9tOiBFdmdlbmkgS29sZXYgPGV2Z2VueXN3QGdtYWlsLmNvbT4KRGF0 ZTogTW9uLCA2IEZlYiAyMDIzIDA5OjQ5OjUyICswMjAwClN1YmplY3Q6IFtQQVRDSF0gRXh0ZW5k IGdvLXRzLW1vZGUgd2l0aCBzdXBwb3J0IGZvciBwcmUtZmlsbGluZyByZXR1cm4KIHN0YXRlbWVu dHMKCkV4dGVuZCBnby10cy1tb2RlIHRvIGluc2VydCBjb250ZXh0LWF3YXJlIHJldHVybiBzdGF0 ZW1lbnQgZm9yIHRoZQpjdXJyZW50IGZ1bmN0aW9uLiBUaGUgcmV0dXJuIHN0YXRlbWVudCBpcyBw 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bug-gnu-emacs@HIDDEN:bug#61368; Package emacs.
Full text available.Received: (at 61368) by debbugs.gnu.org; 9 Feb 2023 13:40:35 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Thu Feb 09 08:40:35 2023 Received: from localhost ([127.0.0.1]:57938 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1pQ7AA-0004Zx-S0 for submit <at> debbugs.gnu.org; Thu, 09 Feb 2023 08:40:35 -0500 Received: from eggs.gnu.org ([209.51.188.92]:39630) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1pQ7A8-0004Zb-KA for 61368 <at> debbugs.gnu.org; Thu, 09 Feb 2023 08:40:33 -0500 Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1pQ7A0-0003d5-6W; Thu, 09 Feb 2023 08:40:26 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=wPbpxefi8evV2B+m6L+EqIsMK9GlyUb9s770kYvV+0g=; b=pLeaweVTTLdt bo2tQLugi6yXGHFfB89VKtjqVXHTuMAuSlySygNttYJa3Clu/hDuOHQmWcLQ5RAELEaDs81E/bbPU 5edQWeWtQcDkYsXSDV5vCbu/zAkb1d9wuKkyaeyxEv8O3FOcon4gM1k//7ohMD0olHHAtLanBbjMZ x/vuRrNDXSr3TZz1gk5v82+rX4sDQRXAHBL3Fp2lpufB1cH8pPPM5ctT7y2aZLOl+MGFO0zAjZ9di n9/zuA2nky3rxMqtp29J3kU/TMM64cLaiLXjIGodAclZGfizsN4oBqynOMPB/p8OY4Qc1foTQksCI d0l9TUPDHVVWbaHegcoK2w==; Received: from [87.69.77.57] (helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1pQ79h-0003XN-HF; Thu, 09 Feb 2023 08:40:23 -0500 Date: Thu, 09 Feb 2023 15:39:55 +0200 Message-Id: <83357flzys.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Evgeni Kolev <evgenysw@HIDDEN> In-Reply-To: <CAMCrgaUa26s2BM8EskKt5FTEyFqyioqx13abOFSMjcyShgG=Pg@HIDDEN> (message from Evgeni Kolev on Thu, 9 Feb 2023 13:47:01 +0200) Subject: Re: bug#61368: [PATCH] Extend go-ts-mode with support for pre-filling return statements References: <CAMCrgaUgMx9+0Q8f_cezZ0TW_-u=mdeHf=TL=qw9wbhiS-nJ9w@HIDDEN> <83edr0nmq6.fsf@HIDDEN> <CAMCrgaUa26s2BM8EskKt5FTEyFqyioqx13abOFSMjcyShgG=Pg@HIDDEN> X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 61368 Cc: dev@HIDDEN, theo@HIDDEN, 61368 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.3 (---) > From: Evgeni Kolev <evgenysw@HIDDEN> > Date: Thu, 9 Feb 2023 13:47:01 +0200 > Cc: 61368 <at> debbugs.gnu.org, dev@HIDDEN, theo@HIDDEN > > > Instead of a command bound to a special key sequences, would it > > perhaps make more sense to add some kind of "electric" behavior to > > "normal" keys? Like perhaps typing RET after inserting "return" would > > add the "context-aware return statement"? Then the user could turn on > > the electric behavior with some minor mode, and get this behavior, > > while avoiding the need to dedicate a key sequence. > > > > WDYT? > > Makes sense. I am familiar with electric-pair-mode. I see that it adds > a hook in post-self-insert-hook. Is your suggestion to do something > like this: > - add hook in post-self-insert-hook > - in the hook check if RET is typed after an "return" > - if yes, replace the "return" with the "context-aware return > statement", possibly using (yas-expand-snippet) Yes, something like that. See electric.el for more examples. > I'm wondering what customization options would make sense for users - > changing the electric trigger from "return" RET to "ret" RET for > example. > > Is there another major mode which can be used as an example for such > electric behavior? Electric modes are usually minor modes that let major modes customize them by setting variables. Again, I think you will find examples in electric.el.
bug-gnu-emacs@HIDDEN:bug#61368; Package emacs.
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From: Evgeni Kolev <evgenysw@HIDDEN>
Date: Thu, 9 Feb 2023 13:47:01 +0200
Message-ID: <CAMCrgaUa26s2BM8EskKt5FTEyFqyioqx13abOFSMjcyShgG=Pg@HIDDEN>
Subject: Re: bug#61368: [PATCH] Extend go-ts-mode with support for pre-filling
return statements
To: Eli Zaretskii <eliz@HIDDEN>
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On Wed, Feb 8, 2023 at 9:20 PM Theodor Thornhill <theo@HIDDEN> wrote:
>
> Evgeni Kolev <evgenysw@HIDDEN> writes:
>
> >
> > I'm open to suggestions about how to best expose this functionality to
> > the user. I think a snippet makes the most sense, but there's no
> > standard way for major modes to expose snippets as far as I'm aware.
> > It's possible to tweak C-c C-r to call (yas-expand-snippet) if
> > available, otherwise call (insert). In general, I don't feel strong
> > about the C-c C-r key binding, but I didn't have a better idea.
> >
>
> How about using tempo or skeleton as fallbacks when yasnippet isn't
> installed?
I've never used either of these packages. Is there a consensus which
one is preferred for major modes to use?
>
> Personally I think this should be a contrib to gopls as a code action so
> that others can benefit from it. Is upstreaming it to gopls too hard?
>
Great suggestion! I did a quick research and this seems to already be
implemented in gopls here:
https://github.com/golang/tools/blob/master/gopls/internal/lsp/source/completion/statements.go#L179
To use it you have to enable "usePlaceholders", reference:
https://github.com/golang/tools/blob/master/gopls/doc/settings.md
Do you think it makes sense go-ts-mode to also have its own
implementation? I think it does - similar to how both gopls (eglot)
and tree sitter provide Imenu candidates. I personally use tree
sitter's Imenu (setq eglot-stay-out-of '(imenu)) because I find it
advantageous to avoid the RPC call to an external process.
Also having a tree sitter implementation is more flexible. For
example, I'm planning to have multiple yasnippet snippets for
different scenarios (wrap the error, don't wrap, return a new error,
etc.). The gopls implementation is ridgid - it only works if there's
an "err" variable in scope, and the trigger is one of these three "if
e", "if er" and "if err".
On Wed, Feb 8, 2023 at 6:30 PM Eli Zaretskii <eliz@HIDDEN> wrote:
> > The command go-ts-mode-insert-return is experimentally bound to a key
> > C-c C-r ("r" as return statement). It's a user error to run C-c C-r
> > outside of a function body.
>
> Instead of a command bound to a special key sequences, would it
> perhaps make more sense to add some kind of "electric" behavior to
> "normal" keys? Like perhaps typing RET after inserting "return" would
> add the "context-aware return statement"? Then the user could turn on
> the electric behavior with some minor mode, and get this behavior,
> while avoiding the need to dedicate a key sequence.
>
> WDYT?
Makes sense. I am familiar with electric-pair-mode. I see that it adds
a hook in post-self-insert-hook. Is your suggestion to do something
like this:
- add hook in post-self-insert-hook
- in the hook check if RET is typed after an "return"
- if yes, replace the "return" with the "context-aware return
statement", possibly using (yas-expand-snippet)
I'm wondering what customization options would make sense for users -
changing the electric trigger from "return" RET to "ret" RET for
example.
Is there another major mode which can be used as an example for such
electric behavior?
bug-gnu-emacs@HIDDEN:bug#61368; Package emacs.
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From: Theodor Thornhill <theo@HIDDEN>
To: Evgeni Kolev <evgenysw@HIDDEN>, bug-gnu-emacs@HIDDEN
Subject: Re: [PATCH] Extend go-ts-mode with support for pre-filling return
statements
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Evgeni Kolev <evgenysw@HIDDEN> writes:
> [CC Randy, author of go-ts-mode, Theo, who asked to keep the patches coming :)]
>
:-)
> This is a patch which adds support to go-ts-mode to insert
> context-aware return statements for the current function. The return
> statements are pre-filled with the Go zero values of the output
> parameters.
>
> For example, all these return statements are inserted by M-x
> go-ts-mode-insert-return:
>
> ```
> func f() (x, y, z int) {
> return 0, 0, 0
> }
>
> func exotic() (bool, int, myStruct, *int, chan bool, error) {
> return false, 0, myStruct{}, nil, nil, err
> }
>
> func closure(numbers []int) {
> sort.Slice(numbers, func(i, j int) bool {
> return false
> })
> }
> ```
Cool!
>
> The command go-ts-mode-insert-return is experimentally bound to a key
> C-c C-r ("r" as return statement). It's a user error to run C-c C-r
> outside of a function body.
>
> Customization: when the output params contain "error" the pre-filled
> text is "err". A customization variable is added to allow the user to
> pick a different value, for example they might pick `fmt.Errorf("...:
> %w", err)` which will result in error wrapping:
> ```
> func f() (int, error) {
> return 0, fmt.Errorf("...: %w", err)
> }
> ```
>
> Personally, I'll use yasnippet instead of C-c C-r. Something like this:
> ```
> # -*- mode: snippet -*-
> # name: ret
> # key: ret
> # type: command
> # --
>
> (let ((go-ts-mode-error-zero-value "${1:fmt.Errorf(\"${2:format}:
> %w\", err)}"))
> (yas-expand-snippet (go-ts-mode-return)))
> ```
>
> I'm open to suggestions about how to best expose this functionality to
> the user. I think a snippet makes the most sense, but there's no
> standard way for major modes to expose snippets as far as I'm aware.
> It's possible to tweak C-c C-r to call (yas-expand-snippet) if
> available, otherwise call (insert). In general, I don't feel strong
> about the C-c C-r key binding, but I didn't have a better idea.
>
How about using tempo or skeleton as fallbacks when yasnippet isn't
installed?
> Known bug: this example does not work, fails with error "Unknown Go
> type "[int]int"":
> ```
> func notOk() (int, map[int]int) {
> }
> ```
> The root cause is an issue with the tree-sitter-go parser. The bug has
> been reported here
> https://github.com/tree-sitter/tree-sitter-go/issues/107
>
> Known limitation: unfamiliar types are assumed to be structs. This
> assumption does not work for aliased types. For example:
> ```
> type MyInt = int
>
> func alias() MyInt {
> return MyInt{}
> }
> ```
> Above the correct return statement is "return MyInt(0)". My assumption
> is that type aliases of primitive types are rare in Go codebases. In
> these rare cases, the user is expected to replace "MyInt{}" with
> "MyInt(0)", or not use C-c C-r at all.
>
> Inspired by: this emacs conf talk "08:21 Intelligent templates"
> https://emacsconf.org/2022/talks/treesitter/
>
> Feedback is more than welcome! In particular:
> - how to best expose the functionality - key binding, snippet (how
> exactly?), something else?
>
Personally I think this should be a contrib to gopls as a code action so
that others can benefit from it. Is upstreaming it to gopls too hard?
Theo
bug-gnu-emacs@HIDDEN:bug#61368; Package emacs.
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Date: Wed, 08 Feb 2023 18:30:41 +0200
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From: Eli Zaretskii <eliz@HIDDEN>
To: Evgeni Kolev <evgenysw@HIDDEN>
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(message from Evgeni Kolev on Wed, 8 Feb 2023 17:27:58 +0200)
Subject: Re: bug#61368: [PATCH] Extend go-ts-mode with support for pre-filling
return statements
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> Cc: Randy Taylor <dev@HIDDEN>, Theodor Thornhill <theo@HIDDEN>
> From: Evgeni Kolev <evgenysw@HIDDEN>
> Date: Wed, 8 Feb 2023 17:27:58 +0200
>
> This is a patch which adds support to go-ts-mode to insert
> context-aware return statements for the current function. The return
> statements are pre-filled with the Go zero values of the output
> parameters.
>
> For example, all these return statements are inserted by M-x
> go-ts-mode-insert-return:
>
> ```
> func f() (x, y, z int) {
> return 0, 0, 0
> }
>
> func exotic() (bool, int, myStruct, *int, chan bool, error) {
> return false, 0, myStruct{}, nil, nil, err
> }
>
> func closure(numbers []int) {
> sort.Slice(numbers, func(i, j int) bool {
> return false
> })
> }
> ```
>
> The command go-ts-mode-insert-return is experimentally bound to a key
> C-c C-r ("r" as return statement). It's a user error to run C-c C-r
> outside of a function body.
Instead of a command bound to a special key sequences, would it
perhaps make more sense to add some kind of "electric" behavior to
"normal" keys? Like perhaps typing RET after inserting "return" would
add the "context-aware return statement"? Then the user could turn on
the electric behavior with some minor mode, and get this behavior,
while avoiding the need to dedicate a key sequence.
WDYT?
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From: Evgeni Kolev <evgenysw@HIDDEN>
Date: Wed, 8 Feb 2023 17:27:58 +0200
Message-ID: <CAMCrgaUgMx9+0Q8f_cezZ0TW_-u=mdeHf=TL=qw9wbhiS-nJ9w@HIDDEN>
Subject: [PATCH] Extend go-ts-mode with support for pre-filling return
statements
To: bug-gnu-emacs@HIDDEN
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[CC Randy, author of go-ts-mode, Theo, who asked to keep the patches coming :)]
This is a patch which adds support to go-ts-mode to insert
context-aware return statements for the current function. The return
statements are pre-filled with the Go zero values of the output
parameters.
For example, all these return statements are inserted by M-x
go-ts-mode-insert-return:
```
func f() (x, y, z int) {
return 0, 0, 0
}
func exotic() (bool, int, myStruct, *int, chan bool, error) {
return false, 0, myStruct{}, nil, nil, err
}
func closure(numbers []int) {
sort.Slice(numbers, func(i, j int) bool {
return false
})
}
```
The command go-ts-mode-insert-return is experimentally bound to a key
C-c C-r ("r" as return statement). It's a user error to run C-c C-r
outside of a function body.
Customization: when the output params contain "error" the pre-filled
text is "err". A customization variable is added to allow the user to
pick a different value, for example they might pick `fmt.Errorf("...:
%w", err)` which will result in error wrapping:
```
func f() (int, error) {
return 0, fmt.Errorf("...: %w", err)
}
```
Personally, I'll use yasnippet instead of C-c C-r. Something like this:
```
# -*- mode: snippet -*-
# name: ret
# key: ret
# type: command
# --
(let ((go-ts-mode-error-zero-value "${1:fmt.Errorf(\"${2:format}:
%w\", err)}"))
(yas-expand-snippet (go-ts-mode-return)))
```
I'm open to suggestions about how to best expose this functionality to
the user. I think a snippet makes the most sense, but there's no
standard way for major modes to expose snippets as far as I'm aware.
It's possible to tweak C-c C-r to call (yas-expand-snippet) if
available, otherwise call (insert). In general, I don't feel strong
about the C-c C-r key binding, but I didn't have a better idea.
Known bug: this example does not work, fails with error "Unknown Go
type "[int]int"":
```
func notOk() (int, map[int]int) {
}
```
The root cause is an issue with the tree-sitter-go parser. The bug has
been reported here
https://github.com/tree-sitter/tree-sitter-go/issues/107
Known limitation: unfamiliar types are assumed to be structs. This
assumption does not work for aliased types. For example:
```
type MyInt = int
func alias() MyInt {
return MyInt{}
}
```
Above the correct return statement is "return MyInt(0)". My assumption
is that type aliases of primitive types are rare in Go codebases. In
these rare cases, the user is expected to replace "MyInt{}" with
"MyInt(0)", or not use C-c C-r at all.
Inspired by: this emacs conf talk "08:21 Intelligent templates"
https://emacsconf.org/2022/talks/treesitter/
Feedback is more than welcome! In particular:
- how to best expose the functionality - key binding, snippet (how
exactly?), something else?
Evgeni
--00000000000045bbbd05f431ead0
Content-Type: application/x-patch;
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--00000000000045bbbd05f431ead0--
Evgeni Kolev <evgenysw@HIDDEN>:bug-gnu-emacs@HIDDEN.
Full text available.bug-gnu-emacs@HIDDEN:bug#61368; Package emacs.
Full text available.
GNU bug tracking system
Copyright (C) 1999 Darren O. Benham,
1997 nCipher Corporation Ltd,
1994-97 Ian Jackson.