diff options
Diffstat (limited to 'lisp/emacs-lisp/cl-macs.el')
| -rw-r--r-- | lisp/emacs-lisp/cl-macs.el | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/lisp/emacs-lisp/cl-macs.el b/lisp/emacs-lisp/cl-macs.el index 80e95724f1f..093e4fbf258 100644 --- a/lisp/emacs-lisp/cl-macs.el +++ b/lisp/emacs-lisp/cl-macs.el @@ -602,7 +602,13 @@ called from BODY." (put 'cl-block-wrapper 'byte-compile 'cl-byte-compile-block) (defun cl-byte-compile-block (cl-form) - (if (fboundp 'byte-compile-form-do-effect) ; Check for optimizing compiler + ;; Here we try to determine if a catch tag is used or not, so as to get rid + ;; of the catch when it's not used. + (if (and (fboundp 'byte-compile-form-do-effect) ; Optimizing compiler? + ;; FIXME: byte-compile-top-level can only be used for code that is + ;; closed (as the name implies), so for lexical scoping we should + ;; implement this optimization differently. + (not lexical-binding)) (progn (let* ((cl-entry (cons (nth 1 (nth 1 (nth 1 cl-form))) nil)) (cl-active-block-names (cons cl-entry cl-active-block-names)) |