Use obarray functions from obarray.

* lisp/abbrev.el (copy-abbrev-table, abbrev-table-p, make-abbrev-table,
  abbrev-table-get, abbrev-table-put, abbrev-table-empty-p,
  clear-abbrev-table, define-abbrev, abbrev--symbol, abbrev-table-menu):
  delegate to obarray.el functions.
* lisp/loadup.el: load obarray before abbrev
* test/automated/abbrev-tests.el: new tests

lisp/abbrev.el

@@ -33,6 +33,7 @@
 ;;; Code:
 
 (eval-when-compile (require 'cl-lib))
+(require 'obarray)
 
 (defgroup abbrev-mode nil
   "Word abbreviations mode."
@@ -87,7 +88,7 @@ be replaced by its expansion."
   "Make a new abbrev-table with the same abbrevs as TABLE.
 Does not copy property lists."
   (let ((new-table (make-abbrev-table)))
-    (mapatoms
+    (obarray-map
      (lambda (symbol)
        (define-abbrev new-table
 	 (symbol-name symbol)
@@ -406,12 +407,12 @@ A prefix argument means don't query; expand all abbrevs."
 
 (defun abbrev-table-get (table prop)
   "Get the PROP property of abbrev table TABLE."
-  (let ((sym (intern-soft "" table)))
+  (let ((sym (obarray-get table "")))
     (if sym (get sym prop))))
 
 (defun abbrev-table-put (table prop val)
   "Set the PROP property of abbrev table TABLE to VAL."
-  (let ((sym (intern "" table)))
+  (let ((sym (obarray-put table "")))
     (set sym nil)	     ; Make sure it won't be confused for an abbrev.
     (put sym prop val)))
 
@@ -435,8 +436,7 @@ See `define-abbrev' for the effect of some special properties.
 (defun make-abbrev-table (&optional props)
   "Create a new, empty abbrev table object.
 PROPS is a list of properties."
-  ;; The value 59 is an arbitrary prime number.
+  (let ((table (obarray-make)))
-  (let ((table (make-vector 59 0)))
     ;; Each abbrev-table has a `modiff' counter which can be used to detect
     ;; when an abbreviation was added.  An example of use would be to
     ;; construct :regexp dynamically as the union of all abbrev names, so
@@ -451,7 +451,7 @@ PROPS is a list of properties."
 
 (defun abbrev-table-p (object)
   "Return non-nil if OBJECT is an abbrev table."
-  (and (vectorp object)
+  (and (obarrayp object)
        (numberp (abbrev-table-get object :abbrev-table-modiff))))
 
 (defun abbrev-table-empty-p (object &optional ignore-system)
@@ -460,12 +460,12 @@ If IGNORE-SYSTEM is non-nil, system definitions are ignored."
   (unless (abbrev-table-p object)
     (error "Non abbrev table object"))
   (not (catch 'some
-	 (mapatoms (lambda (abbrev)
+	 (obarray-map (lambda (abbrev)
-		     (unless (or (zerop (length (symbol-name abbrev)))
+                        (unless (or (zerop (length (symbol-name abbrev)))
-				 (and ignore-system
+                                    (and ignore-system
-				      (abbrev-get abbrev :system)))
+                                         (abbrev-get abbrev :system)))
-		       (throw 'some t)))
+                          (throw 'some t)))
-		   object))))
+                      object))))
 
 (defvar global-abbrev-table (make-abbrev-table)
   "The abbrev table whose abbrevs affect all buffers.
@@ -529,12 +529,12 @@ the current abbrev table before abbrev lookup happens."
 (defun clear-abbrev-table (table)
   "Undefine all abbrevs in abbrev table TABLE, leaving it empty."
   (setq abbrevs-changed t)
-  (let* ((sym (intern-soft "" table)))
+  (let* ((sym (obarray-get table "")))
     (dotimes (i (length table))
       (aset table i 0))
     ;; Preserve the table's properties.
     (cl-assert sym)
-    (let ((newsym (intern "" table)))
+    (let ((newsym (obarray-put table "")))
       (set newsym nil)	     ; Make sure it won't be confused for an abbrev.
       (setplist newsym (symbol-plist sym)))
     (abbrev-table-put table :abbrev-table-modiff
@@ -583,7 +583,7 @@ An obsolete but still supported calling form is:
   (setq props (plist-put props :abbrev-table-modiff
                          (abbrev-table-get table :abbrev-table-modiff)))
   (let ((system-flag (plist-get props :system))
-        (sym (intern name table)))
+        (sym (obarray-put table name)))
     ;; Don't override a prior user-defined abbrev with a system abbrev,
     ;; unless system-flag is `force'.
     (unless (and (not (memq system-flag '(nil force)))
@@ -673,10 +673,10 @@ The value is nil if that abbrev is not defined."
          ;; abbrevs do, we have to be careful.
          (sym
           ;; First try without case-folding.
-          (or (intern-soft abbrev table)
+          (or (obarray-get table abbrev)
               (when case-fold
                 ;; We didn't find any abbrev, try case-folding.
-                (let ((sym (intern-soft (downcase abbrev) table)))
+                (let ((sym (obarray-get table (downcase abbrev))))
                   ;; Only use it if it doesn't require :case-fixed.
                   (and sym (not (abbrev-get sym :case-fixed))
                        sym))))))
@@ -1005,17 +1005,17 @@ PROMPT is the prompt to use for the keymap.
 SORTFUN is passed to `sort' to change the default ordering."
   (unless sortfun (setq sortfun 'string-lessp))
   (let ((entries ()))
-    (mapatoms (lambda (abbrev)
+    (obarray-map (lambda (abbrev)
-                (when (symbol-value abbrev)
+                   (when (symbol-value abbrev)
-                  (let ((name (symbol-name abbrev)))
+                     (let ((name (symbol-name abbrev)))
-                    (push `(,(intern name) menu-item ,name
+                       (push `(,(intern name) menu-item ,name
-                            (lambda () (interactive)
+                               (lambda () (interactive)
-                              (abbrev-insert ',abbrev)))
+                                 (abbrev-insert ',abbrev)))
-                          entries))))
+                             entries))))
-              table)
+                 table)
     (nconc (make-sparse-keymap prompt)
            (sort entries (lambda (x y)
-                (funcall sortfun (nth 2 x) (nth 2 y)))))))
+                           (funcall sortfun (nth 2 x) (nth 2 y)))))))
 
 ;; Keep it after define-abbrev-table, since define-derived-mode uses
 ;; define-abbrev-table.

lisp/loadup.el

@@ -153,6 +153,7 @@
 (load "emacs-lisp/nadvice")
 (load "emacs-lisp/cl-preloaded")
 (load "minibuffer")            ;After loaddefs, for define-minor-mode.
+(load "obarray")        ;abbrev.el is implemented in terms of obarrays.
 (load "abbrev")         ;lisp-mode.el and simple.el use define-abbrev-table.
 (load "simple")
 

test/automated/abbrev-tests.el

@@ -1,4 +1,4 @@
-;;; abbrev-tests.el --- Test suite for abbrevs.
+;;; abbrev-tests.el --- Test suite for abbrevs  -*- lexical-binding: t; -*-
 
 ;; Copyright (C) 2015 Free Software Foundation, Inc.
 
@@ -20,11 +20,43 @@
 ;; You should have received a copy of the GNU General Public License
 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
 
+;;; Commentary:
+
 ;;; Code:
 
 (require 'ert)
 (require 'abbrev)
 
+(ert-deftest abbrev-table-p-test ()
+  (should-not (abbrev-table-p 42))
+  (should-not (abbrev-table-p "aoeu"))
+  (should-not (abbrev-table-p '()))
+  (should-not (abbrev-table-p []))
+  ;; Missing :abbrev-table-modiff counter:
+  (should-not (abbrev-table-p (obarray-make)))
+  (let* ((table (obarray-make)))
+    (abbrev-table-put table :abbrev-table-modiff 42)
+    (should (abbrev-table-p table))))
+
+(ert-deftest abbrev-make-abbrev-table-test ()
+  ;; Table without properties:
+  (let ((table (make-abbrev-table)))
+    (should (abbrev-table-p table))
+    (should (= (length table) obarray-default-size)))
+  ;; Table with one property 'foo with value 'bar:
+  (let ((table (make-abbrev-table '(foo bar))))
+    (should (abbrev-table-p table))
+    (should (= (length table) obarray-default-size))
+    (should (eq (abbrev-table-get table 'foo) 'bar))))
+
+(ert-deftest abbrev-table-get-put-test ()
+  (let ((table (make-abbrev-table)))
+    (should-not (abbrev-table-get table 'foo))
+    (should (= (abbrev-table-put table 'foo 42) 42))
+    (should (= (abbrev-table-get table 'foo) 42))
+    (should (eq (abbrev-table-put table 'foo 'bar) 'bar))
+    (should (eq (abbrev-table-get table 'foo) 'bar))))
+
 (ert-deftest copy-abbrev-table-test ()
   (defvar foo-abbrev-table nil)         ; Avoid compiler warning
   (define-abbrev-table 'foo-abbrev-table
@@ -39,5 +71,4 @@
   (should-not (string-equal (buffer-name) "*Backtrace*")))
 
 (provide 'abbrev-tests)
-
 ;;; abbrev-tests.el ends here