export macro symbol with @ failed

export macro symbol with @ failed

[nalaginrut]

hi all, I got a problem with @.
It's OK when I export procedure with @:
==============
(define aaa (@ (rnrs) make-bytevector))
==============

but it'd failed if exported a macro.  
============================
scheme@(guile-user)> (define aaa (@ (rnrs) unless))
While compiling expression:
ERROR: Syntax error:
unknown location: source expression failed to match any pattern in form
unless
============================

is it a bug?

-- 
GNU Powered it
GPL Protected it
GOD Blessed it

HFG - NalaGinrut

--hacker key--
v4sw7CUSMhw6ln6pr8OSFck4ma9u8MLSOFw3WDXGm7g/l8Li6e7t4TNGSb8AGORTDLMen6g6RASZOGCHPa28s1MIr4p-x hackerkey.com
---end key---

Re: export macro symbol with @ failed

[Ian Price]

nalaginrut <nalaginrut@gmail.com> writes:

> hi all, I got a problem with @.
> It's OK when I export procedure with @:
> ==============
> (define aaa (@ (rnrs) make-bytevector))
> ==============
>
> but it'd failed if exported a macro.  
> ============================
> scheme@(guile-user)> (define aaa (@ (rnrs) unless))
> While compiling expression:
> ERROR: Syntax error:
> unknown location: source expression failed to match any pattern in form
> unless
> ============================
>
> is it a bug?

I don't think so. The second form would be equivalent to (define aaa
unless) if unless was imported by the module, and this is also an error
because unless is not an identifier syntax.

If I were you I'd (use-modules (rnrs control)) or (import (rnrs
control)) instead.

-- 
Ian Price

"There are only two hard problems in Computer Science: cache invalidation
and naming things." - Phil Karlton

Re: export macro symbol with @ failed

[nalaginrut]

> I don't think so. The second form would be equivalent to (define aaa
> unless) if unless was imported by the module, and this is also an error
> because unless is not an identifier syntax.
> 
> If I were you I'd (use-modules (rnrs control)) or (import (rnrs
> control)) instead.
> 

Well, thanks!
Finally I've wrote an unless macro for myself. But I'm happy to know the
reason why it failed. :)

-- 
GNU Powered it
GPL Protected it
GOD Blessed it

HFG - NalaGinrut

--hacker key--
v4sw7CUSMhw6ln6pr8OSFck4ma9u8MLSOFw3WDXGm7g/l8Li6e7t4TNGSb8AGORTDLMen6g6RASZOGCHPa28s1MIr4p-x hackerkey.com
---end key---

Re: export macro symbol with @ failed

[Andy Wingo]

Hi nalingarut,

On Mon 13 Jun 2011 05:54, nalaginrut <nalaginrut@gmail.com> writes:

> scheme@(guile-user)> (define aaa (@ (rnrs) unless))
> While compiling expression:
> ERROR: Syntax error:
> unknown location: source expression failed to match any pattern in form
> unless

As Ian said it's expected.  It would work like this:

  (define-syntax aaa (identifier-syntax (@ (rnrs) unless)))

Andy
-- 
http://wingolog.org/