c++ - Vim [compile and] run shortcut

Question

Basically what I want is a keyboard shortcut in vim that lets me [compile and] run the currently being edited C, C++ or Python program. In psuedocode:

when a shortcut key is pressed:
    if current_extension == 'c' then
        shell: gcc this_filename.c -o this_filename_without_extension
        if retcode == 0 then shell: ./this_filename_without_extension
    else if current_extension == 'cpp' then
        shell: g++ this_filename.cpp -o this_filename_without_extension
    if retcode == 0 then shell: ./this_filename_without_extension
    else if current_extension == 'py' then
        shell: python this_filename.py
    end if
end key

I realise I might be asking a bit much but would love it if this was possible!

Answer 1

Something like this would work. Just create filetype autocmd that map <F4> or whatever you want to save and compile and run the program. It uses exec to build the string and uses shellescape to escape the file name.

autocmd filetype python nnoremap <F4> :w <bar> exec '!python '.shellescape('%')<CR>
autocmd filetype c nnoremap <F4> :w <bar> exec '!gcc '.shellescape('%').' -o '.shellescape('%:r').' && ./'.shellescape('%:r')<CR>
autocmd filetype cpp nnoremap <F4> :w <bar> exec '!g++ '.shellescape('%').' -o '.shellescape('%:r').' && ./'.shellescape('%:r')<CR>

% is the current buffer filename. %:r is the buffer filename without extension