Re: map ,... can't work except , why? Vista+gVim V7.2

Thanks, i seems to know what's happening. However, why vim(or
Windows?) doesn't make a mapping as follow?

ASCII-----------------Latin1
Ctrl+0x20 -------> 0x80
Ctrl+0x21 -------> 0x81
...........
Ctrl+0x3F -------> 0x9F

And if so, both Ctrl+digit and Alt+digit can work.
Is 0x80~0x9F occupied by Ctrl+Alt+'x'?

Regards,
-William

On Tue, Jun 15, 2010 at 5:06 PM, Tony Mechelynck
<antoine.mechelynck@gmail.com> wrote:
> On 15/06/10 06:49, William Fugy wrote:
>>
>> Hi list,
>>
>> Does anyone know why the following mapping can't work, and how to make
>> it enable?
>>
>> " Windows Vista + gVim V7.2
>> :map<C-->  <C-W>w-
>> :map<C-=>  <C-W>w+
>>
>> ':map<C-->/<C-=>' and ':verbose map<C-->/<C--=>', it's OK.  i.e.
>> it's in the map list and hasn't been modified by others map.
>>
>> ------------------------------------------
>> i tried any<C+Numeric key>, in main keyboard not in keypad, none
>> could work except<C-6>(interior map by gVim self).
>> While mapping<A-1>,<A-2>....<A-=>, all of them can work.
>>
>>
>> Regards,
>> -William
>>
>
> Because, in ASCII, they are not defined.
>
> What you get when you hit Ctrl and 6 together is probably not Ctrl-6 (which
> is not defined) but Ctrl-^ (which is defined as 0x1E).
>
> The only Ctrl+printable keys defined by ASCII (and therefore known by Vim)
> are the following:
>
> - Ctrl-? (control + Question-mark) is 0x7F (aka DEL)
> - If X is in the range 0x40 to 0x5F (including all uppercase letters and 6
> non-alphabetic characters) then Ctrl-X = X - 0x40 (eks minus hex-40)
> - If x is a lowercase letter, then Ctrl-x is the same as Ctrl+ upcase(x)
>
> That's all. The digits are 0x30 to 0x39 so they aren't included in any of
> the above cases, and Ctrl+digit is not defined.
>
> OTOH, if X is in the range 0x00 to 0x7F, Alt+x is x + 0x80. This means that
> every 7-bit ASCII character has an Alt counterpart in the upper half of the
> Latin1 character set. However, it also means that if you use accented
> letters, you should avoid using Alt+something as the {lhs} of an Insert-mode
> mapping. For example, to Vim, é (small-e-acute) is the same as Alt-i (Alt
> with small-i), so if you map Alt-i to do something, Vim will also do it when
> you hit é (similarly, see above paragraphs, for Tab and Ctrl-I, Esc and
> Ctrl-[, Enter and Ctrl-M).
>
> Note that the Alt modifier is case-sensitive while the Ctrl modifier isn't.
>
>
> Best regards,
> Tony.
> --
> For a man to truly understand rejection, he must first be ignored by a
> cat.
>

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