Execute content of buffer as vimscript

Question

I have a nofile buffer that contains vimscript, and I want to execute it. However, :so % will not work because it requires a saved file, not a buffer. Is there a vim command to do this by default? If not, is it possible to create a function which does the same things?

Answer 1

Yes, you can yank the whole buffer with ggyG or :%y and execute it with :@".

In short:

:%y|@"<CR>

Used in a mapping:

nnoremap <key> :%y|@"<CR>

Used in a flexible command that works on the whole buffer by default or an optional range:

command! -bar -range=% Foo execute <line1> . ',' . <line2> . 'y|@"'