Can't bind "\C-=" and "\C-+" keys

Can't bind "\C-=" and "\C-+" keys

[d2002xx]

Hi all.

When I bind the two keys by (global-set-key "\C-=" 'undo) and
(global-set-key "\C-+" 'redo), Emacs says "Invalid modifiers in
string".

But interactively using global-set-key works well, does somebody know
what's the problem?

Re: Can't bind "\C-=" and "\C-+" keys

[Stefan Monnier <foo@acm.com>]

>>>>> "d2002xx" == d2002xx  <d2002xx@myrealbox.com> writes:
> When I bind the two keys by (global-set-key "\C-=" 'undo) and
> (global-set-key "\C-+" 'redo), Emacs says "Invalid modifiers in
> string".

C-= and C-+ are not characters, so you can't put them into a string.
Thus you need to use something like

        (global-set-key [(control ?+)] 'redo)


-- Stefan

Re: Can't bind "\C-=" and "\C-+" keys

[Unknown]

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The nice guy "Stefan Monnier <foo@acm.com>"
<monnier+gnu.emacs.help/news/@flint.cs.yale.edu> wrote:

>>>>>> "d2002xx" == d2002xx  <d2002xx@myrealbox.com> writes:
>> When I bind the two keys by (global-set-key "\C-=" 'undo) and
>> (global-set-key "\C-+" 'redo), Emacs says "Invalid modifiers in
>> string".
>
> C-= and C-+ are not characters, so you can't put them into a string.
> Thus you need to use something like
>
>         (global-set-key [(control ?+)] 'redo)

It works!! Thank you!!!

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