From: Mark H Weaver <mhw@netris.org>
To: 13995@debbugs.gnu.org
Subject: bug#13995: Problem with macros whose expansions define and use auxiliary macros
Date: Mon, 18 Mar 2013 19:11:17 -0400 [thread overview]
Message-ID: <87mwu0fgmi.fsf@tines.lan> (raw)
Consider the following module:
--8<---------------cut here---------------start------------->8---
(define-module (foo)
#:export (foo))
(define-syntax-rule (foo bar)
(begin
(define-syntax-rule (blah x) x)
(define (bar val) (blah val))))
--8<---------------cut here---------------end--------------->8---
and the following session with v2.0.7-204-g1ea3762:
--8<---------------cut here---------------start------------->8---
scheme@(guile-user)> ,use (foo)
scheme@(guile-user)> (foo bar)
scheme@(guile-user)> (bar 5)
ERROR: In procedure #<syntax-transformer blah>:
ERROR: Wrong type to apply: #<syntax-transformer blah>
Entering a new prompt. Type `,bt' for a backtrace or `,q' to continue.
scheme@(guile-user) [1]>
--8<---------------cut here---------------end--------------->8---
Note that it works when the same 'foo' macro is entered directly
at a fresh REPL:
--8<---------------cut here---------------start------------->8---
scheme@(guile-user)>
(define-syntax-rule (foo bar)
(begin
(define-syntax-rule (blah x) x)
(define (bar val) (blah val))))
scheme@(guile-user)> (foo bar)
scheme@(guile-user)> (bar 5)
$1 = 5
scheme@(guile-user)>
--8<---------------cut here---------------end--------------->8---
Mark
next reply other threads:[~2013-03-18 23:11 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-18 23:11 Mark H Weaver [this message]
2013-03-20 12:33 ` bug#13995: Problem with macros whose expansions define and use auxiliary macros Andy Wingo
2013-03-20 17:30 ` Mark H Weaver
2016-06-20 20:22 ` Andy Wingo
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