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Optimize fontification by avoiding recalculating a constant regexp #11

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Optimize fontification by avoiding recalculating a constant regexp #11

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19 changes: 11 additions & 8 deletions lisp-extra-font-lock.el
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Original file line number Diff line number Diff line change
Expand Up @@ -577,6 +577,16 @@ the end of the quoted expression."
"List of `cl-loop' named variable binding parameters.")


(defvar lisp-extra-font-lock--loop-keywords-regexp
(concat
"\\_<"
"\\("
(regexp-opt (append
lisp-extra-font-lock-loop-keywords-with-var
lisp-extra-font-lock-loop-keywords))
"\\)"
"\\_>"))

;; Match named loop keywords, and (optionally) any bound variables.
;;
;; Note, does not support "destructuring", i.e. binding several
Expand All @@ -589,14 +599,7 @@ the end of the quoted expression."
(forward-comment (buffer-size))
(and (< (point) limit)
(not (looking-at
(concat
"\\_<"
"\\("
(regexp-opt (append
lisp-extra-font-lock-loop-keywords-with-var
lisp-extra-font-lock-loop-keywords))
"\\)"
"\\_>")))))
lisp-extra-font-lock--loop-keywords-regexp))))
(condition-case nil
(forward-sexp)
(error (goto-char limit))))
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