The name of a function is often used for reference when writing this blog.

M-x a-function-name then M-o, we can see there is a selection panel:

o: default i: open the file according to the environment d: definition h: help

With the function wr/ivy-yank-function-name-action, you can copy the function name using the correct format.

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(defun wr/ivy-yank-function-name-action (x)
    "Send name of function to kill-ring.
  See `ivy-set-actions`"
    (with-temp-buffer
      (progn
        (insert "~")
        (insert x)
        (insert "~")
        (kill-ring-save (point-min) (point-max)))))

  (ivy-set-actions
   'counsel-M-x
   '(("c" wr/ivy-yank-function-name-action "copy function name")))

You can also set actions for non-interactive commands such as wr/ivy-yank-function-name-action using the following snippet:

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(ivy-set-actions
   'counsel-describe-function
   '(("c" wr/ivy-yank-function-name-action "copy function name"))