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author	Mattias Engdegård <mattiase@acm.org>
	Tue, 18 May 2021 10:03:11 +0000 (12:03 +0200)
committer	Mattias Engdegård <mattiase@acm.org>
	Tue, 18 May 2021 10:34:30 +0000 (12:34 +0200)
commit	be9db2b94d31a0afe3f93302558b3a78605244c7
tree	ed6b70146ad94da66d8390ad9c1179f1255580da	tree \| snapshot
parent	ed8c3303f945fbd2c16ece0e87d041c75ae05ff9	commit \| diff

Fix pcase 'rx' patterns with a single named submatch (bug#48477)

pcase 'rx' patterns with a single named submatch, like

(rx (let x "a"))

would always succeed because of an over-optimistic transformation.
Patterns with 0 or more than 1 named submatches were not affected.

Reported by Philipp Stephani.

* lisp/emacs-lisp/rx.el (rx--pcase-macroexpander):
Special case for a single named submatch.
* test/lisp/emacs-lisp/rx-tests.el (rx-pcase): Add tests.

lisp/emacs-lisp/rx.el		diff \| blob \| history
test/lisp/emacs-lisp/rx-tests.el		diff \| blob \| history

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