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The current syntax for functions in `app` and `pred` patterns allows a shorthand (F ARGS) where the object being matched is added as an extra last argument. This is nice for things like (pred (< 5)) but sometimes the object needs to be at another position. Until now you had to use (pred (lambda (x) (memq x my-list))) or (pred (pcase--flip memq my-list)) in those cases. So, introduce a new shorthand where `_` can be used to indicate where the object should be passed: (pred (memq _ my-list)) * lisp/emacs-lisp/pcase.el (pcase--split-pred): Document new syntax for pred/app functions. (pcase--funcall): Support new syntax. (pcase--flip): Declare obsolete. (pcase--u1, \`): Use `_` instead. (pcase--split-pred): Adjust accordingly. * doc/lispref/control.texi (pcase Macro): Document new syntax for pred/app functions. * lisp/progmodes/opascal.el (pcase-defmacro): * lisp/emacs-lisp/seq.el (seq--make-pcase-bindings): * lisp/emacs-lisp/eieio.el (eieio): * lisp/emacs-lisp/cl-macs.el (cl-struct, cl-type): Use _ instead of `pcase--flip`. (cl--pcase-mutually-exclusive-p): Adjust accordingly. * lisp/emacs-lisp/map.el (map--pcase-map-elt): Declare obsolete. (map--make-pcase-bindings): Use `_` instead. |
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This directory contains the architecture-independent files used by or with Emacs. This includes some text files of documentation for GNU Emacs or of interest to Emacs users, and the file of dumped docstrings for Emacs functions and variables. COPYRIGHT AND LICENSE INFORMATION FOR IMAGE FILES File: emacs.icon Author: Sun Microsystems, Inc Copyright (C) 1999, 2001-2024 Free Software Foundation, Inc. License: GNU General Public License version 3 or later (see COPYING)