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Re: elisp question:keyboard-translate with hyper fail?


From: Deniz Dogan
Subject: Re: elisp question:keyboard-translate with hyper fail?
Date: Sat, 12 Mar 2011 12:59:44 +0100

2011/3/12 Xah Lee <address@hidden>:
> On Mar 11, 6:54 pm, Stefan Monnier <address@hidden> wrote:
>> > ;; Swap “Ctrl+x” and “Ctrl+t”, so it's easier to type on Dvorak layout
>> > (keyboard-translate ?\C-t ?\C-x)
>> > (keyboard-translate ?\C-x ?\C-t)
>>
>> There are 32 Ctrl+letter combinations which are characters, and the
>> above two are among them.  These are exceptional special cases due
>> to history.  My general recommendation is to not use keyboard-translate
>> but key-translation-map or function-key-map, which work on arbitrary
>> key sequences rather only on single-char events.
>>
>>         Stefan
>
> thanks to all.
>
> perhaps the doc can be improved.
>
> i just read up the elisp doc and it actually gives a C- example.
>
>  -- Function: keyboard-translate from to
>     This function modifies `keyboard-translate-table' to translate
>     character code FROM into character code TO.  It creates the
>     keyboard translate table if necessary.
>
>   Here's an example of using the `keyboard-translate-table' to make
> `C-x', `C-c' and `C-v' perform the cut, copy and paste operations:
>
>     (keyboard-translate ?\C-x 'control-x)
>     (keyboard-translate ?\C-c 'control-c)
>     (keyboard-translate ?\C-v 'control-v)
>     (global-set-key [control-x] 'kill-region)
>     (global-set-key [control-c] 'kill-ring-save)
>     (global-set-key [control-v] 'yank)
>
> also note it uses the syntax 「'control-x」. I don't quite understand
> it...
>
> should it be a bug report?
>

The examples with C-x, C-c and C-v are valid. The keys C-a up to C-z
and probably a few others (Stefan said there are 32 of them) are all
characters. C-3 however is not a character.

I don't think it's a bug in the documentation, but maybe it should
clarify this matter?

-- 
Deniz Dogan



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