Hi!

I just tried the patch. It solved the problem I reported. However, when I
did some more testing I realized that there is still a difference between
ESC and the real meta key. ESC c toggles case-sensitivity. However, Meta-c
doesn't (it exits the search).

    -- Anders


On Mon, Dec 16, 2013 at 9:32 PM, Juri Linkov <juri@jurta.org> wrote:

> > I just found another (minor) detail problem regarding the new isearch
> > system.
> >
> > I sometimes use ESCAPE as the meta key. However, to exit an isearch
> search,
> > pressing the real meta key (Cmd, on my mac) and < work as intended.
> > However, the sequence ESCAPE < does not. Emacs simply responds that
> > "<escape> < is undefined".
>
> Hopefully, the following patch fixes this in a correct way.
> At least, it works in all tests that I tried:
>
> C-s ESC <       - exits isearch and goes to the top
> C-s ESC c       - doesn't exit isearch and toggles case-sensitivity
> C-s ESC ESC ESC - cancels isearch
>
> === modified file 'lisp/isearch.el'
> --- lisp/isearch.el     2013-12-06 00:55:20 +0000
> +++ lisp/isearch.el     2013-12-16 20:28:12 +0000
> @@ -435,8 +435,7 @@ (defvar isearch-mode-map
>      ;; would be simpler to disable the global keymap, and/or have a
>      ;; default local key binding for any key not otherwise bound.
>      (let ((meta-map (make-sparse-keymap)))
> -      (define-key map (char-to-string meta-prefix-char) meta-map)
> -      (define-key map [escape] meta-map))
> +      (define-key map (char-to-string meta-prefix-char) meta-map))
>
>      ;; Several non-printing chars change the searching behavior.
>      (define-key map "\C-s" 'isearch-repeat-forward)
> @@ -453,7 +452,6 @@ (defvar isearch-mode-map
>      (or (= ?\e meta-prefix-char)
>         (error "Inconsistency in isearch.el"))
>      (define-key map "\e\e\e" 'isearch-cancel)
> -    (define-key map  [escape escape escape] 'isearch-cancel)
>
>      (define-key map "\C-q" 'isearch-quote-char)
>
>