1 files changed, 65 insertions, 0 deletions
diff --git a/lisp/emacs-lisp/bytecomp.el b/lisp/emacs-lisp/bytecomp.el
index 471a0b623ad..4078a7314f3 100644
--- a/lisp/emacs-lisp/bytecomp.el
+++ b/lisp/emacs-lisp/bytecomp.el
@@ -5043,6 +5043,71 @@ binding slots have been popped."
        nil))
 
     (_ (byte-compile-keep-pending form))))
+
+
+
+;; Key syntax warnings.
+
+(mapc
+ (lambda (elem)
+   (put (car elem) 'byte-hunk-handler
+        (lambda (form)
+          (dolist (idx (cdr elem))
+            (let ((key (elt form idx)))
+              (when (or (vectorp key)
+                        (and (stringp key)
+                             (not (key-valid-p key))))
+                (byte-compile-warn "Invalid `kbd' syntax: %S" key))))
+          form)))
+ ;; Functions and the place(s) for the key definition(s).
+ '((keymap-set 2)
+   (keymap-global-set 1)
+   (keymap-local-set 1)
+   (keymap-unset 2)
+   (keymap-global-unset 1)
+   (keymap-local-unset 1)
+   (keymap-substitute 1 2)
+   (keymap-set-after 2)
+   (key-translate 1 2)
+   (keymap-lookup 2)
+   (keymap-global-lookup 1)
+   (keymap-local-lookup 1)))
+
+(put 'define-keymap 'byte-hunk-handler #'byte-compile-define-keymap)
+(defun byte-compile-define-keymap (form)
+  (let ((result nil)
+        (orig-form form))
+    (push (pop form) result)
+    (while (and form
+                (keywordp (car form))
+                (not (eq (car form) :menu)))
+      (unless (memq (car form)
+                    '(:full :keymap :parent :suppress :name :prefix))
+        (byte-compile-warn "Invalid keyword: %s" (car form)))
+      (push (pop form) result)
+      (when (null form)
+        (byte-compile-warn "Uneven number of keywords in %S" form))
+      (push (pop form) result))
+    ;; Bindings.
+    (while form
+      (let ((key (pop form)))
+        (when (stringp key)
+          (unless (key-valid-p key)
+            (byte-compile-warn "Invalid `kbd' syntax: %S" key)))
+          ;; No improvement.
+        (push key result))
+      (when (null form)
+        (byte-compile-warn "Uneven number of key bindings in %S" form))
+      (push (pop form) result))
+    orig-form))
+
+(put 'define-keymap--define 'byte-hunk-handler
+     #'byte-compile-define-keymap--define)
+(defun byte-compile-define-keymap--define (form)
+  (when (consp (nth 1 form))
+    (byte-compile-define-keymap (nth 1 form)))
+  form)
+
 
 ;;; tags