vimrc: add augroup clang_format

.vim/vimrc

@@ -292,6 +292,25 @@ let g:deoplete#enable_at_startup = 0
 exec 'source ' . escape(expand('~/.vim'),' ') . '/' . 'deoplete.vimrc.vim'
 
 
+" clang-format
+let g:clang_format#auto_format=0
+let g:clang_format#detect_style_file=1
+augroup clang_format
+    autocmd!
+    autocmd FileType c,cpp,proto nnoremap <buffer><Leader>cf :<C-u>ClangFormat<cr>
+    autocmd FileType c,cpp,proto vnoremap <buffer><Leader>cf :ClangFormat<cr>
+
+    function! Formatonsave()
+        " alternative function to clang-format#auto_format param
+        if exists(':ClangFormat')
+            let l:formatdiff = 1
+            " pyf /usr/share/clang/clang-format.py
+            ClangFormat
+        endif
+    endfunction
+    " autocmd BufWritePre *.h,*.cc,*.cpp call Formatonsave()
+augroup END
+
 
 let g:livepreview_cursorhold_recompile = 0
 let g:livepreview_previewer = 'evince'