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Warn about duplicated :tag strings in defcustom choices

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It is bad user experience when two menu items have identical labels.

* lisp/emacs-lisp/bytecomp.el (bytecomp--check-cus-type): Add check.
* test/lisp/emacs-lisp/bytecomp-tests.el
(bytecomp-test-defcustom-type): Add test case.
This commit is contained in:
Mattias Engdegård 2023-09-19 15:18:11 +02:00
parent 321f2e1e4d
commit b03338c70d
2 changed files with 12 additions and 2 deletions
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5
test/lisp/emacs-lisp/bytecomp-tests.el
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@ -1875,7 +1875,7 @@ EXPECTED-POINT BINDINGS (MODES \\='\\='(ruby-mode js-mode python-mode)) \
(FIXTURE-FN \\='#\\='electric-pair-mode))" fill-column)))
(ert-deftest bytecomp-test-defcustom-type ()
(cl-flet ((dc (type) `(defcustom mytest nil "doc" :type ',type)))
(cl-flet ((dc (type) `(defcustom mytest nil "doc" :type ',type :group 'test)))
(bytecomp--with-warning-test
(rx "type should not be quoted") (dc ''integer))
(bytecomp--with-warning-test
@ -1890,6 +1890,9 @@ EXPECTED-POINT BINDINGS (MODES \\='\\='(ruby-mode js-mode python-mode)) \
(bytecomp--with-warning-test
(rx "duplicated value in `choice': `a'")
(dc '(choice (const a) (const b) (const a))))
(bytecomp--with-warning-test
(rx "duplicated :tag string in `choice': \"X\"")
(dc '(choice (const :tag "X" a) (const :tag "Y" b) (other :tag "X" c))))
(bytecomp--with-warning-test
(rx "`cons' requires 2 type specs, found 1")
(dc '(cons :tag "a" integer)))