Re: Trouble trying to understand how low level macros interact with module system.
"Mike J. Bell" <[email protected]> Sat, 29 Nov 2008 21:53:48 -0500
| Newsgroups | gmane.comp.java.sisc.user |
|---|---|
| Message-ID | <[email protected]> |
--===============6231189836183616356== Content-Type: multipart/alternative; boundary="----=_Part_79008_7321726.1228013628617" ------=_Part_79008_7321726.1228013628617 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Content-Disposition: inline Try: (module ((thefunc) (amacro thefunc)) (define-macro amacro (lambda () (thefunc))) (define (thefunc) (display "\n\n---\n\n"))) This (I think) means make an anonymous module with two exported symbols, thefunc and amacro (which depends on thefunc). Somebody else can I'm sure give you a better theoretical reason why this works (and what it really means, and why yours does what it does, which isn't very intuitive to me off hand). Mike On Sat, Nov 29, 2008 at 8:02 PM, Igor Hjelmstrom Vinhas Ribeiro < [email protected]> wrote: > Hello! > > I am trying to understand how the module system used by SISC > interacts with the low-level macros that SISC supports. > > Specifically, I am trying to figure out why the follow snippet of > code, an anonymous module that exports amacro and thefunc, > doesn't work. > > (module (amacro thefunc) > (define-macro amacro (lambda () (thefunc))) > (define (thefunc) (display "\n\n===\n\n"))) > > After I pasted it in the REPL, when I call (amacro) I get: > > #;> (amacro) > Error: undefined variable 'thefunc'. > console:16:7: <indeterminate call> > > Curiously, if I just go ahead and type (thefunc) it works: > > #;> (thefunc) > > > === > > #;> > > Is anyone able to explain to me why this happens? > > Regards, > Igor. > > ------------------------------------------------------------------------- > This SF.Net email is sponsored by the Moblin Your Move Developer's > challenge > Build the coolest Linux based applications with Moblin SDK & win great > prizes > Grand prize is a trip for two to an Open Source event anywhere in the world > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > _______________________________________________ > Sisc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/sisc-users > > -- Mike J. Bell on gmail ------=_Part_79008_7321726.1228013628617 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 7bit Content-Disposition: inline Try:<br><br>(module ((thefunc) (amacro thefunc))<br> (define-macro amacro (lambda () (thefunc)))<br> (define (thefunc) (display "\n\n---\n\n")))<br><br>This (I think) means make an anonymous module with two exported symbols, thefunc and amacro (which depends on thefunc).<br> <br>Somebody else can I'm sure give you a better theoretical reason why this works (and what it really means, and why yours does what it does, which isn't very intuitive to me off hand).<br><br>Mike<br><br><br><div class="gmail_quote"> On Sat, Nov 29, 2008 at 8:02 PM, Igor Hjelmstrom Vinhas Ribeiro <span dir="ltr"><<a href="mailto:[email protected]">[email protected]</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Hello!<br><br> I am trying to understand how the module system used by SISC<br>interacts with the low-level macros that SISC supports.<br><br> Specifically, I am trying to figure out why the follow snippet of<br> code, an anonymous module that exports amacro and thefunc,<br> doesn't work.<br><br> (module (amacro thefunc)<br> (define-macro amacro (lambda () (thefunc)))<br> (define (thefunc) (display "\n\n===\n\n")))<br><br> After I pasted it in the REPL, when I call (amacro) I get:<br> <br> #;> (amacro)<br> Error: undefined variable 'thefunc'.<br> console:16:7: <indeterminate call><br><br> Curiously, if I just go ahead and type (thefunc) it works:<br><br> #;> (thefunc)<br><br> <br> ===<br><br> #;> <br><br> Is anyone able to explain to me why this happens?<br><br>Regards,<br><font color="#888888"> Igor.<br> </font><br>-------------------------------------------------------------------------<br> This SF.Net email is sponsored by the Moblin Your Move Developer's challenge<br> Build the coolest Linux based applications with Moblin SDK & win great prizes<br> Grand prize is a trip for two to an Open Source event anywhere in the world<br> <a href="http://moblin-contest.org/redirect.php?banner_id=100&url=/" target="_blank">http://moblin-contest.org/redirect.php?banner_id=100&url=/</a><br>_______________________________________________<br> Sisc-users mailing list<br> <a href="mailto:[email protected]">[email protected]</a><br> <a href="https://lists.sourceforge.net/lists/listinfo/sisc-users" target="_blank">https://lists.sourceforge.net/lists/listinfo/sisc-users</a><br> <br></blockquote></div><br><br clear="all"><br>-- <br>Mike J. Bell on gmail<br> ------=_Part_79008_7321726.1228013628617-- --===============6231189836183616356== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ --===============6231189836183616356== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Sisc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/sisc-users --===============6231189836183616356==--