Refactor def-setting!/set! implementation

The `doom-settings` variable has been removed. Setting checks are done
with fboundp now, which is simpler.

core/autoload/help.el

@@ -68,13 +68,20 @@
 
 Defaults to the "
   (interactive
-   (let ((sym (symbol-at-point)))
+   (let ((settings (cl-loop with case-fold-search = nil
+                            for sym being the symbols of obarray
+                            for sym-name = (symbol-name sym)
+                            if (string-match "^doom--set\\(:.+\\)" sym-name)
+                            collect (match-string 1 sym-name)))
+         (sym (symbol-at-point)))
      (list (completing-read "Describe setting: "
-                            (sort (mapcar #'car doom-settings) #'string-lessp)
+                            (sort settings #'string-lessp)
                             nil t (if (keywordp sym) (symbol-name sym))))))
-  (let ((fn (cdr (assq (intern setting) doom-settings))))
-    (unless fn
-      (error "'%s' is not a valid DOOM setting" setting))
+  (or (stringp setting)
+      (signal 'wrong-type-argument (list 'stringp setting)))
+  (let ((fn (intern-soft (format "doom--set%s" setting))))
+    (or (fboundp fn)
+        (error "'%s' is not a valid DOOM setting" setting))
     (describe-function fn)))
 
 ;;;###autoload

core/core-packages.el

@@ -806,9 +806,6 @@ loads MODULE SUBMODULE's packages.el file."
 ;; `set!'. If a setting doesn't exist at runtime, the `set!' call is ignored and
 ;; its arguments are left unevaluated (and entirely omitted when byte-compiled).
 
-(defvar doom-settings nil
-  "An alist mapping setting keywords to functions.")
-
 (defmacro def-setting! (keyword arglist &optional docstring &rest forms)
   "Define a setting. Like `defmacro', this should return a form to be executed
 when called with `set!'. FORMS are not evaluated until `set!' calls it.
@@ -817,14 +814,10 @@ See `doom/describe-setting' for a list of available settings.
 
 Do not use this for configuring Doom core."
   (declare (indent defun) (doc-string 3))
-  (unless (keywordp keyword)
-    (error "Not a valid property name: %s" keyword))
-  (let ((fn (intern (format "doom--set%s" keyword))))
-    `(progn
-       (defun ,fn ,arglist
-         ,docstring
-         ,@forms)
-       (map-put doom-settings ,keyword #',fn))))
+  (or (keywordp keyword)
+      (signal 'wrong-type-argument (list 'keywordp keyword)))
+  `(fset ',(intern (format "doom--set%s" keyword))
+         (lambda ,arglist ,docstring ,@forms)))
 
 (defmacro set! (keyword &rest values)
   "Set an option defined by `def-setting!'. Skip if doesn't exist. See
@@ -832,13 +825,12 @@ Do not use this for configuring Doom core."
 
 VALUES doesn't get evaluated if the KEYWORD setting doesn't exist."
   (declare (indent defun))
-  (unless values
-    (error "Empty set! for %s" keyword))
-  (if-let* ((fn (cdr (assq keyword doom-settings))))
-      (apply fn values)
-    (when doom-debug-mode
-      (message "No setting found for %s" keyword)
-      nil)))
+  (let ((fn (intern-soft (format "doom--set%s" keyword))))
+    (if (and fn (fboundp fn))
+        (apply fn values)
+      (when doom-debug-mode
+        (message "No setting found for %s" keyword)
+        nil))))
 
 (provide 'core-packages)
 ;;; core-packages.el ends here

core/test/core-lib.el

@@ -107,11 +107,10 @@
 
 (def-test! set
   (eval-and-compile
-    (let (doom-settings)
-      (def-setting! :-test-setting (x) `(setq result ,x))
-      (should (assq :-test-setting doom-settings))
+    (def-setting! :-test-setting (x) `(setq result ,x))
+    (should (fboundp 'doom--set:-test-setting))
       (let ((inhibit-message t)
             result)
         (set! :-test-setting t)
         (should result)
-        (set! :non-existant-setting (error "This shouldn't trigger"))))))
+        (set! :non-existant-setting (error "This shouldn't trigger")))))