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(cl-defstruct): Improve handling of unknown options

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Until now `cl-defstruct` signaled an error when encountering an
unknown option.  It's easy to code and it does the job, but it
doesn't give good location info in the compiler's output,
and it makes it more painful to use not-yet-supported options.
So just signal a warning instead.

* lisp/emacs-lisp/cl-macs.el (cl-defstruct): Warn about unknown
options, instead of signaling an error.
This commit is contained in:
Stefan Monnier 2024-04-16 21:17:47 -04:00
parent 2141caca30
commit 484b097909
1 changed files with 6 additions and 1 deletions
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7
lisp/emacs-lisp/cl-macs.el
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@ -3010,6 +3010,7 @@ To see the documentation for a defined struct type, use
;; All the above is for the following def-form.
&rest &or symbolp (symbolp &optional def-form &rest sexp))))
(let* ((name (if (consp struct) (car struct) struct))
(warning nil)
(opts (cdr-safe struct))
(slots nil)
(defaults nil)
@ -3094,7 +3095,10 @@ To see the documentation for a defined struct type, use
(setq descs (nconc (make-list (car args) '(cl-skip-slot))
descs)))
(t
(error "Structure option %s unrecognized" opt)))))
(setq warning
(macroexp-warn-and-return
(format "Structure option %S unrecognized" opt)
warning nil nil (list opt struct)))))))
(unless (or include-name type
;; Don't create a bogus parent to `cl-structure-object'
;; while compiling the (cl-defstruct cl-structure-object ..)
@ -3333,6 +3337,7 @@ To see the documentation for a defined struct type, use
(cl-struct-define ',name ,docstring ',include-name
',(or type 'record) ,(eq named t) ',descs
',tag-symbol ',tag ',print-auto))
,warning
',name)))
;;; Add cl-struct support to pcase