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Subject: |
Problem with macros whose expansions define and use auxiliary macros |
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Date: |
Mon, 18 Mar 2013 19:11:17 -0400 |
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
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--- Begin Message ---
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Subject: |
Re: bug#13995: Problem with macros whose expansions define and use auxiliary macros |
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Date: |
Mon, 20 Jun 2016 22:22:00 +0200 |
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User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux) |
So, this example works on master, but for reasons you don't like. We
can't fix it on 2.0. If you feel that the solution for macro-introduced
identifiers in 2.2 is a release blocker, let's open a thread on -devel
again and talk about it, see if we can find some solutions :)
In the meantime, closing this one, as there's no 2.0 task and the code
"works" in 2.2.
Andy
On Tue 19 Mar 2013 00:11, Mark H Weaver <address@hidden> writes:
> Consider the following module:
>
> (define-module (foo)
> #:export (foo))
>
> (define-syntax-rule (foo bar)
> (begin
> (define-syntax-rule (blah x) x)
> (define (bar val) (blah val))))
>
> and the following session with v2.0.7-204-g1ea3762:
>
> 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]>
>
> Note that it works when the same 'foo' macro is entered directly
> at a fresh REPL:
>
> 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)>
>
> Mark
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