Initial support for C++

after/ftplugin/cpp.vim

@@ -1 +1,30 @@
-nnoremap <F9> :<C-U>w <CR> :!g++ -Wall -std=c++11 % -o %<&&./%<<CR>
+nnoremap <silent> <buffer> <F9> :call <SID>compile_run_cpp()<CR>
+
+function! s:compile_run_cpp() abort
+  let src_path = expand('%:p:~')
+  let src_noext = expand('%:p:~:r')
+  " The building flags
+  let _flag = '-Wall -Wextra -std=c++11 -O2'
+
+  if executable('clang++')
+    let prog = 'clang++'
+  elseif executable('g++')
+    let prog = 'g++'
+  else
+    echoerr 'No C++ compiler found on the system!'
+  endif
+  call s:create_term_buf('h', 20)
+  execute printf('term %s %s %s -o %s && %s', prog, _flag, src_path, src_noext, src_noext)
+  startinsert
+endfunction
+
+function s:create_term_buf(_type, size) abort
+  set splitbelow
+  set splitright
+  if a:_type ==# 'v'
+    vnew
+  else
+    new
+  endif
+  execute 'resize ' . a:size
+endfunction