Case-sensitive keyboard shortcuts

I'd like some map/remap/nmap/etc. commands to be case sensitive, e.g. "<C-I>" vs. "<C-i>".

I ch开发者_如何转开发ecked Google and :help map, but was unable to find this.

It appears you currently can't combine control with case-sensitivity in vim or gvim (I'm using 7.2). I might expect this to be a limitation of terminals for the former, but not the latter.

I tested it by typing this in a buffer:

map <c-i> :echo "c-i"<cr>
map <c-s-i> :echo "c-s-i"<cr>

Yank those lines, then :@" (when executes register " as commands). Verifying the maps with :map <c-i> and <c-s-i> shows the problem: <c-i> is <tab>, and only the last one takes effect, with the shift being ignored.

For alt, <a-i> and <a-s-i> do work as expected in gvim

In terminal vim, those two get mapped to é and É (at least here, check with ":map <a-i>" as above), and typing é/É directly (I use dead keys) does invoke the mapping. Actually doing a-i or a-s-i just enters insert mode.

Of course, non-control and non-alt maps work case-sensitively.

Add S for Shift

<C-S-i>

If you use your Caps Lock, (1) what on earth for?, and (2) you'll have problems. See here if this is your situation.

My bad.

Cannot be done, by design, with printable characters. The approach above does work with F1 et al, such as <C-S-F8>. See this thread for more.

My workaround would be to map it to something entirely different and obscure, and use AutoHotkey or similar to substitute the combination only for the uppercase variant.

Docs say that "CTRL-A and CTRL-a are equivalent".

Relevant part from :help notation

CTRL-{char}   {char} typed as a control character; that is, typing {char}
              while holding the CTRL key down.  The case of {char} does not
              matter; thus CTRL-A and CTRL-a are equivalent.  But on some
              terminals, using the SHIFT key will produce another code,
              don't use it then.

(not intended as an answer, but as relevant info for anybody comming from search engine regarding case sensitivity)