%:r in vimrc file?:gcc and :!gcc ?% in vimrc file?I'm studying vi/vim...but it's hard for me. I want information about vimrc operations. where can I get it??
I really appreciate all answers.
Let's answer your questions in order…
What is difference between :gcc and :!gcc?
:something is an ex command. You can find a complete list of available ex commands under :help ex-cmd-index and look for help on a specific command with :help :something.
:gcc is not an existing ex command.
:!something calls the external command something so :!gcc would call gcc.
What is % in vimrc file?
It's not anything specific to your vimrc. When used as argument to an external command, it represents the current file name. Assuming the current file name is foobar.c, :!gcc % is expanded to gcc foobar.c before being passed to the shell.
See :help c_%.
What is %:r in vimrc file?
Again, it's not anything specific to your vimrc. :r is a file name modifier applied to the current file name. Assuming the current file name is foobar.c, %:r would be expanded to foobar.
See :help filename-modifiers.
It looks like you are trying to make sense of a command similar to:
:!gcc % -o %:r
which, again assuming the current file name is foobar.c, should be expanded to:
gcc foobar.c -o foobar
before being sent to your shell… and result in a foobar executable right beside your foobar.c.