info-look elisp matching

info-look elisp matching

[Kevin Ryde]

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I'd like to propose some matching for the elisp mode support, so
lookups will go to an exact position.

	* info-look.el (emacs-lisp-mode): Add prefix/suffix matching regexps.


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*** info-look.el.~1.30.~	Tue Apr  1 08:55:07 2003
--- info-look.el	Tue Apr  1 09:56:52 2003
*************** (info-lookup-maybe-add-help
*** 756,764 ****
  (info-lookup-maybe-add-help
   :mode 'emacs-lisp-mode
   :regexp "[^][()'\" \t\n]+"
!  :doc-spec '(("(emacs)Command Index")
! 	     ("(emacs)Variable Index")
! 	     ("(elisp)Index")))
  
  (info-lookup-maybe-add-help
   :mode 'lisp-interaction-mode
--- 756,774 ----
  (info-lookup-maybe-add-help
   :mode 'emacs-lisp-mode
   :regexp "[^][()'\" \t\n]+"
!  :doc-spec '(;; Commands with key sequences appear in nodes as `foo' and
!              ;; those without as `M-x foo'.
!              ("(emacs)Command Index"  nil "`\\(M-x[ \t\n]+\\)?" "'")
!              ;; Variables normally appear in nodes as just `foo'.
!              ("(emacs)Variable Index" nil "`" "'")
!              ;; Almost all functions, variables, etc appear in nodes as
!              ;; " - Function: foo" etc.  A small number of aliases and
!              ;; symbols appear only as `foo', and will miss out on exact
!              ;; positions.  Allowing `foo' would hit too many false matches
!              ;; for things that should go to Function: etc, and those latter
!              ;; are much more important.  Perhaps this could change if some
!              ;; sort of fallback match scheme existed.
!              ("(elisp)Index"          nil "^ - .*: " "\\( \\|$\\)")))
  
  (info-lookup-maybe-add-help
   :mode 'lisp-interaction-mode

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Re: info-look elisp matching

[Richard Stallman]

    I'd like to propose some matching for the elisp mode support, so
    lookups will go to an exact position.

I don't understand.  Could you explain what change in behavior this
is supposed to result in?

Re: info-look elisp matching

[Kevin Ryde]

Richard Stallman <rms@gnu.org> writes:
>
> I don't understand.  Could you explain what change in behavior this
> is supposed to result in?

In an elisp mode buffer, "C-h C-i nth" opens a window with the "List
Elements" node from the elisp manual, but showing the top of that
node.  With the change instead the window position shows the
"Function: nth" part and highlights `nth'.  Similarly commands or
variables from the main emacs manual.

(This is the purpose of the prefix/suffix regexps scheme in info-look,
hence the terse changelog entry.)