[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
bug#13678: 24.2.93; pcase: mention list-like QPatterns in the doc
|
From: |
Stefan Monnier |
|
Subject: |
bug#13678: 24.2.93; pcase: mention list-like QPatterns in the doc |
|
Date: |
Sun, 10 Feb 2013 20:43:57 -0500 |
|
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux) |
> Sure, `(QPAT1 . QPAT2)' also matches lists - but `(QPAT1 . QPAT2)' and
> `(QPat1 ...QPatn)' are different forms (expressions)
Actually, no, they are identical:
(QPAT1 QPAT2 QPAT3) is indistinguishable from
(QPAT1 . (QPAT2 . (QPAT3 . nil)))
the equivalence between the two is imposed by the reader, long before we
know that these things will be "patterns in a pcase" rather than
expressions, or data in a quoted thingy, ...
Stefan