Yank file name / path of current buffer in Vim

Question

Assuming the current buffer is a file open for edit, so :e does not display E32: No file name.

I would like to yank one or all of:

Answer 1

Answer tested on Neovim/Ubunutu.

From what I can tell, the % register already contains the relative filepath, so it's as simple as moving the contents of the % register to whatever register represents your favourite clipboard.

This SO answer deals with copying from one register to another

:let @+=@%

Seems pretty straightforward to me. No need for any hard-to-remember expand() stuff.