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Re: eldoc-mode can't enabled in sql-mode


From: stardiviner
Subject: Re: eldoc-mode can't enabled in sql-mode
Date: Sun, 08 Mar 2020 10:35:28 +0800
User-agent: mu4e 1.3.8; emacs 28.0.50

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Štěpán Němec <address@hidden> writes:

> On Sat, 07 Mar 2020 21:41:21 +0800
> stardiviner wrote:
>
>> I found I can't enable "eldoc-mode" in "sql-mode". No matter how I enable it
>> with [M-x eldoc-mode] or [M-: (eldoc-mode)] or (turn-on-eldoc-mode).
>>
>> I only got this message output:
>>
>> There is no ElDoc support in this buffer
>>
>> What's the problem?
>
> As the message says: ElDoc needs some support to function, and sql-mode
> does not provide it. The support involves modifying the value of
> 'eldoc-documentation-function', or, since Emacs 28,
> 'eldoc-documentation-functions'.

I guess this problem is related to my two days ago, I re-compiled Emacs from
master branch which version should be 28.

So I did this:

(add-to-list 'eldoc-documentation-functions 'ejc-eldoc-function)

Then eldoc-mode can be enabled. Even though the problem is solved. But this
still has issue, why setting ~eldoc-documentation-function~ does not work?

>
> Adding such support is typically very easy if it makes sense for a mode.
> You might try your hand at it yourself, I'm sure a patch would be
> welcome.


- -- 
[ stardiviner ]
       I try to make every word tell the meaning what I want to express.

       Blog: https://stardiviner.github.io/
       IRC(freenode): stardiviner, Matrix: stardiviner
       GPG: F09F650D7D674819892591401B5DF1C95AE89AC3
      
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