* emacs-lisp/byte-opt.el (byte-optimize-pure-func): Remove function

(originally checked in as byte-optimize-concat on 1997-11-02).

1 files changed, 0 insertions, 21 deletions

diff --git a/lisp/emacs-lisp/byte-opt.el b/lisp/emacs-lisp/byte-opt.el
index 61f7268adff..93d76c52076 100644
--- a/lisp/emacs-lisp/byte-opt.el
+++ b/lisp/emacs-lisp/byte-opt.el
@@ -1118,27 +1118,6 @@
 	(byte-optimize-predicate form))
     form))
 
-(put 'concat 'byte-optimizer 'byte-optimize-pure-func)
-(put 'symbol-name 'byte-optimizer 'byte-optimize-pure-func)
-(put 'regexp-opt 'byte-optimizer 'byte-optimize-pure-func)
-(put 'regexp-quote 'byte-optimizer 'byte-optimize-pure-func)
-(put 'string-to-syntax 'byte-optimizer 'byte-optimize-pure-func)
-(defun byte-optimize-pure-func (form)
-  "Do constant folding for pure functions.
-This assumes that the function will not have any side-effects and that
-its return value depends solely on its arguments.
-If the function can signal an error, this might change the semantics
-of FORM by signaling the error at compile-time."
-  (let ((args (cdr form))
-	(constant t))
-    (while (and args constant)
-      (or (byte-compile-constp (car args))
-	  (setq constant nil))
-      (setq args (cdr args)))
-    (if constant
-	(list 'quote (eval form))
-      form)))
-
 ;; Avoid having to write forward-... with a negative arg for speed.
 ;; Fixme: don't be limited to constant args.
 (put 'backward-char 'byte-optimizer 'byte-optimize-backward-char)