I'd like to search a buffer for headlines only. A headline is anything starting with the "`*`" character. Ideally, I'd invoke an interactive function which would take user input at the minibuffer. I'd only give it the string I'd like to search for (for example `foo`) and not worry about the regex (which would be the headline prefix `"^\*.* "` + `foo`). The function should behave the same as the classic `regexp-isearch` : reading input from the minibuffer, and search for next occurrence if you invoke it again.


Any ideas how I could do this?

**EDIT**

I found this code here. I edited it like this : 

    (defun search-headings ()
      "search for selected text"
      (interactive)
      (isearch-mode t t) ; forward + REGEXP
      (isearch-yank-string "^\*.* " ))

When I call search-headings the minibuffer shows a modified version of my regex, instead of `"^\*.* "`it shows `"\^\*\.\* "`