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| author | Stefan Monnier <monnier@iro.umontreal.ca> | 2024-09-24 14:01:26 -0400 |
|---|---|---|
| committer | Stefan Monnier <monnier@iro.umontreal.ca> | 2024-09-24 14:01:26 -0400 |
| commit | e8f5df5175170d36f526e46b63b3d428bb9a8950 (patch) | |
| tree | 14d3b8ebf4c282f5157ab84f11012dff8d8368d4 /lisp/emacs-lisp/pcase.el | |
| parent | ce601de1cafa65d6e6f5ba52e9c794873d164fbd (diff) | |
| download | emacs-e8f5df5175170d36f526e46b63b3d428bb9a8950.tar.gz emacs-e8f5df5175170d36f526e46b63b3d428bb9a8950.tar.bz2 emacs-e8f5df5175170d36f526e46b63b3d428bb9a8950.zip | |
Declare nested backquotes unsupported in Pcase patterns (bug#72328)
The current behavior is inconsistent with that of the normal backquote
macro, so to avoid surprises, warn about the use of nested backquotes.
* lisp/emacs-lisp/pcase.el (pcase--expand-\`): Warn about nested backquotes.
* lisp/emacs-lisp/testcover.el (testcover-analyze-coverage)
(testcover-analyze-coverage-wrapped-form): Avoid nested backquotes
Diffstat (limited to 'lisp/emacs-lisp/pcase.el')
| -rw-r--r-- | lisp/emacs-lisp/pcase.el | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/lisp/emacs-lisp/pcase.el b/lisp/emacs-lisp/pcase.el index fd6b0c8db5c..fe62820f0cb 100644 --- a/lisp/emacs-lisp/pcase.el +++ b/lisp/emacs-lisp/pcase.el @@ -1172,7 +1172,10 @@ The predicate is the logical-AND of: (upatd (pcase--expand-\` (cdr qpat)))) (if (and (eq (car-safe upata) 'quote) (eq (car-safe upatd) 'quote)) `'(,(cadr upata) . ,(cadr upatd)) - `(and (pred consp) + `(and ,@(when (eq (car qpat) '\`) + `((guard ,(macroexp-warn-and-return + "Nested ` are not supported" t nil nil qpat)))) + (pred consp) (app car-safe ,upata) (app cdr-safe ,upatd))))) ((or (stringp qpat) (numberp qpat) (symbolp qpat)) `',qpat) |