Re: why remap is not working

On Sat, April 2, 2011 6:14 am, Jean-Rene David wrote:
> * wei gao [2011.04.01 02:40]:
>> I want to add ";" to the end of line when coding. So, I add the
>> following
>> map in vimrc. however, it's not working for me (if I change to <C-e>,
>> it's
>> OK). Anybody know why? <C-;> is mapped to a special command already?
>>
>> :inoremap <C-;> <C-o>A;
>
> While you may see things like <C-e> or <C-]> as a sequence of keys, vim
> actually gets those as a single character. These characters are *typed*
> using a combination of the control key and another key on your keyboard
> but when they actually reach vim they are one character.
>
> The set of these so called "control characters" are the first 32 ASCII
> values (namely 0x00 to 0x1F in hex). You can map each control character
> (which are "unprintable" characters) to a printable character used to
> enter it on the keyboard. You do this by adding 0x40 to the value of the
> control character like this:
>
> 0x00 = <C-@> maps to 0x40 = @
> 0x01 = <C-A> maps to 0x41 = A
> 0x02 = <C-B> maps to 0x42 = B
> 0x03 = <C-C> maps to 0x43 = C
> ...
> 0x1A = <C-Z> maps to 0x5A = Z
> 0x1B = <C-[> maps to 0x5B = [
> 0x1C = <C-\> maps to 0x5C = \
> 0x1D = <C-]> maps to 0x5D = ]
> 0x1E = <C-^> maps to 0x5E = ^
> 0x1F = <C-_> maps to 0x5F = _
>
> And that's it. There are no others.
>
> So, long story short, the reason you can't map <C-;> is that there is no
> such character.

For the record, this is also covered briefly in the FAQ:
http://vimhelp.appspot.com/vim_faq.txt.html#faq-20.5

regards,
Christian

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