tags-search

tags-search is an interactive autoloaded compiled Lisp function in `etags.el'.

It is bound to <menu-bar> <edit> <search> <tags-srch>.

(tags-search REGEXP &optional FILE-LIST-FORM)

Search through all files listed in tags table for match for REGEXP.
Stops when a match is found.
To continue searching for next match, use command M-x tags-loop-continue.

If FILE-LIST-FORM is non-nil, it should be a form that, when
evaluated, will return a list of file names. The search will be
restricted to these files.

Also see the documentation of the `tags-file-name' variable.