From: Daniel Colascione <dancol@dancol.org>
To: Emacs development discussions <emacs-devel@gnu.org>
Subject: RFC: rough draft of Python-style generators for elisp
Date: Mon, 26 Nov 2012 22:16:44 -0500 [thread overview]
Message-ID: <50B4309C.5000109@dancol.org> (raw)
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Over at https://github.com/dcolascione/elisp-generators, I have a
pure-elisp implementation of Python-style generators for elisp.
Perhaps the feature is best illustrate by example:
(defgenerator mygen (i)
(yield 1)
(yield i)
(yield 3))
(let ((gen (mygen 100)))
(list (funcall gen)
(funcall gen)
(funcall gen)))
-> (1 100 3)
Yields can appear in arbitrary code:
(defgenerator mygen2 (lim)
(loop for x from 0 to lim do (yield x)))
The package works by rewriting elisp into continuation-passing form
and closing over the resulting continuations with a driver loop that
transitions from one continuation-state to the next. After the last
yield, the facility signals generator-ended.
Please take a look. It'd be nice if there were cl-loop extensions to
iterate over the things, and if generators were available with regular
defun the way yield is available with regular "def" in Python.
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next reply other threads:[~2012-11-27 3:16 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-27 3:16 Daniel Colascione [this message]
2012-11-27 15:31 ` RFC: rough draft of Python-style generators for elisp Burton Samograd
2012-11-27 21:24 ` Daniel Colascione
2012-11-27 21:26 ` Daniel Colascione
2012-11-29 8:41 ` Levin Du
2012-11-29 18:49 ` Daniel Colascione
2012-11-29 19:47 ` Stefan Monnier
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