GNU bug report logs - #23430
25.0.93; iter-defun does not support special form save-current-buffer

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Dmitry Gutov <dgutov <at> yandex.ru>
To: bug-gnu-emacs <at> gnu.org
Subject: 25.0.93; iter-defun does not support special form save-current-buffer
Date: Tue, 03 May 2016 04:31:24 +0300

Example:

;; -*- lexical-binding: t -*-

(iter-defun (str buf)
  (with-current-buffer buf
    (goto-char (point-min)))
  (let (done)
    (while (not done)
      (with-current-buffer buf
        (if (search-forward str)
            (iter-yield (match-beginning 0))
          (setq done 0))))))

...upon evaluation, says: "special form (save-current-buffer (set-buffer
buf) (if (search-forward str) (cps-internal-yield (match-beginning 0))
(setq cps-binding-done- 0))) incorrect or not supported".

The above example seemed to me to be the prime use case for generator.el
(e.g. lazily parsing output from an asynchronous process), so this
is disappointing.

In GNU Emacs 25.0.93.2 (x86_64-unknown-linux-gnu, GTK+ Version 3.18.9)
 of 2016-04-30 built on axl
Repository revision: ffe701cb07cfb3584c4e4894976f0c9487d02c59
Windowing system distributor 'The X.Org Foundation', version 11.0.11803000
System Description:	Ubuntu 16.04 LTS

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