Close buffer via <C-@> using CtrlP

ctrlp.vim

let g:ctrlp_buffer_func = { 'enter': 'CtrlPMappings' }

function! CtrlPMappings()
  nnoremap <buffer> <silent> <C-@> :call <sid>DeleteBuffer()<cr>
endfunction

function! s:DeleteBuffer()
  let path = fnamemodify(getline('.')[2:], ':p')
  let bufn = matchstr(path, '\v\d+\ze\*No Name')
  exec "bd" bufn ==# "" ? path : bufn
  exec "norm \<F5>"
endfunction