-;; XXX: This should be a generic function in emacs somewhere, not
-;; here.
-(defun point-invisible-p ()
- "Return whether the character at point is invisible.
-
-Here visibility is determined by `buffer-invisibility-spec' and
-the invisible property of any overlays for point. It doesn't have
-anything to do with whether point is currently being displayed
-within the current window."
- (let ((prop (get-char-property (point) 'invisible)))
- (if (eq buffer-invisibility-spec t)
- prop
- (or (memq prop buffer-invisibility-spec)
- (assq prop buffer-invisibility-spec)))))
+(defun notmuch-remove-if-not (predicate list)
+ "Return a copy of LIST with all items not satisfying PREDICATE removed."
+ (let (out)
+ (while list
+ (when (funcall predicate (car list))
+ (push (car list) out))
+ (setq list (cdr list)))
+ (nreverse out)))
+
+; This lets us avoid compiling these replacement functions when emacs
+; is sufficiently new enough to supply them alone. We do the macro
+; treatment rather than just wrapping our defun calls in a when form
+; specifically so that the compiler never sees the code on new emacs,
+; (since the code is triggering warnings that we don't know how to get
+; rid of.
+;
+; A more clever macro here would accept a condition and a list of forms.
+(defmacro compile-on-emacs-prior-to-23 (form)
+ "Conditionally evaluate form only on emacs < emacs-23."
+ (list 'when (< emacs-major-version 23)
+ form))