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Diffstat (limited to 'lisp/emacs-lisp/pcase.el')
| -rw-r--r-- | lisp/emacs-lisp/pcase.el | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/lisp/emacs-lisp/pcase.el b/lisp/emacs-lisp/pcase.el index 5a7f3995311..fd6b0c8db5c 100644 --- a/lisp/emacs-lisp/pcase.el +++ b/lisp/emacs-lisp/pcase.el @@ -241,9 +241,14 @@ not signal an error." ;;;###autoload (defmacro pcase-lambda (lambda-list &rest body) "Like `lambda' but allow each argument to be a pattern. -I.e. accepts the usual &optional and &rest keywords, but every -formal argument can be any pattern accepted by `pcase' (a mere -variable name being but a special case of it)." +I.e. accepts the usual &optional and &rest keywords, but every formal +argument can be any pattern destructed by `pcase-let' (a mere variable +name being but a special case of it). + +Each argument should match its respective pattern in the parameter +list (i.e. be of a compatible structure); a mismatch may signal an error +or may go undetected, binding arguments to arbitrary values, such as +nil." (declare (doc-string 2) (indent defun) (debug (&define (&rest pcase-PAT) lambda-doc def-body))) (let* ((bindings ()) |