How to map to toggle comments in vim?

Question

I use vim under iterm2. I\'m using the NERDCommenter plugin, and I\'d like to use Ctrl+/ to toggle comments (Trying to switch from Idea/Eclipse to vim). This is my mapping i

Answer 1

Just to sum up the information from other answers. For me (there might be a difference due to the fact that I'm using neovim) <C-/> works fine on Windows, but I need to use <C-_> on Linux:

if has('win32')
  nmap <C-/> <leader>c<Space>
  vmap <C-/> <leader>c<Space>
else
  nmap <C-_> <leader>c<Space>
  vmap <C-_> <leader>c<Space>
endif

Answer 2

For some reason, vim registers <C-/> as <C-_> (you can see it in insert mode using <C-v><C-/>). It can be the terminal or a historical design thing that terminal apps have to suffer.

And Gvim doesn't even try to recognize <C-/>. Sees it as single /.

Answer 3

If you're using iTerm2 + vim, maybe the following steps can help you:

1. Add following code to your .vimrc file.

   map ,cc <plug>NERDCommenterToggle

   or if you have defined your <leader> as ,

   map <leader>cc <plug>NERDCommenterToggle

2. Check if you can use ,cc to toggle comments in vim

3. Open iTerm2 -> Preferences -> Keys, click the + button

4. Select Send Text with "vim" Special Chars, enter ,cc, like this.

5. Now you can use C-/ to toggle comments in vim.

Answer 4

Here is how you can do it regaining the selection if you are in visual mode:

nmap <C-_>   <Plug>NERDCommenterToggle
vmap <C-_>   <Plug>NERDCommenterToggle<CR>gv