<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META content="text/html; charset=us-ascii" http-equiv=Content-Type> <META name=GENERATOR content="MSHTML 9.00.8112.16437"></HEAD> <BODY> <DIV dir=ltr align=left><SPAN class=449392022-14102011><FONT color=#0000ff size=2 face=Arial>As far as I know, begin is the only form being spliced. Not only at top level, but also within bodies of procedures and let-like forms. Racket specialists may tell you more about it. You may want to visit the following page: <A href="http://docs.racket-lang.org/reference/begin.html?q=begin#(form._((quote._~23~25kernel)._begin">http://docs.racket-lang.org/reference/begin.html?q=begin#(form._((quote._~23~25kernel)._begin</A>))</FONT></SPAN></DIV> <DIV dir=ltr align=left><SPAN class=449392022-14102011><FONT color=#0000ff size=2 face=Arial>Jos</FONT></SPAN></DIV><BR> <DIV dir=ltr lang=en-us class=OutlookMessageHeader align=left> <HR tabIndex=-1> <FONT size=2 face=Tahoma><B>From:</B> nicolas.oury@gmail.com [mailto:nicolas.oury@gmail.com] <BR><B>Sent:</B> viernes, 14 de octubre de 2011 23:17<BR><B>To:</B> Jos Koot<BR><B>Cc:</B> users@racket-lang.org<BR><B>Subject:</B> Re: [racket] begin and let/cc<BR></FONT><BR></DIV> <DIV></DIV>Thank you so much. That clarifies it. <DIV>Is there a list of forms that splice into their context?<BR><BR> <DIV class=gmail_quote>On Fri, Oct 14, 2011 at 9:27 PM, Jos Koot <SPAN dir=ltr><<A href="mailto:jos.koot@telefonica.net">jos.koot@telefonica.net</A>></SPAN> wrote:<BR> <BLOCKQUOTE style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class=gmail_quote><U></U> <DIV> <DIV dir=ltr align=left><SPAN><FONT color=#0000ff size=2 face=Arial>In addition to my previous mail:put the code in the definitions window of DrRacket and use the macro stepper to see how the code is expanded.</FONT></SPAN></DIV> <DIV class=im> <DIV dir=ltr align=left><SPAN><FONT color=#0000ff size=2 face=Arial>Jos</FONT></SPAN></DIV><BR> <DIV dir=ltr lang=en-us align=left> <HR> <FONT size=2 face=Tahoma><B>From:</B> <A href="mailto:users-bounces@racket-lang.org" target=_blank>users-bounces@racket-lang.org</A> [mailto:<A href="mailto:users-bounces@racket-lang.org" target=_blank>users-bounces@racket-lang.org</A>] <B>On Behalf Of </B><A href="mailto:nicolas.oury@gmail.com" target=_blank>nicolas.oury@gmail.com</A><BR><B>Sent:</B> viernes, 14 de octubre de 2011 21:40<BR><B>To:</B> <A href="mailto:users@racket-lang.org" target=_blank>users@racket-lang.org</A><BR><B>Subject:</B> [racket] begin and let/cc<BR></FONT><BR></DIV> <DIV></DIV></DIV> <DIV> <DIV></DIV> <DIV class=h5> <DIV>Dear all,</DIV> <DIV><BR></DIV> <DIV>I don't understand this behaviour:</DIV> <DIV><BR></DIV> <DIV>> (define k #f)</DIV> <DIV>> (begin (let/cc out (set! k out)) 5)</DIV> <DIV>5</DIV> <DIV>> (k #f)</DIV> <DIV>#f</DIV> <DIV>> (let () (let/cc out (set! k out)) 5)</DIV> <DIV>5</DIV> <DIV>> (k #f)</DIV> <DIV>5</DIV> <DIV><BR></DIV> <DIV><BR></DIV> <DIV>Does begin something special regarding continuation?</DIV> <DIV><BR></DIV> <DIV><BR></DIV> <DIV>Best regards,</DIV> <DIV><BR></DIV> <DIV>Nicolas.</DIV></DIV></DIV></DIV></BLOCKQUOTE></DIV><BR><BR clear=all> <DIV><BR></DIV>-- <BR>Sent from an IBM Model M, 15 August 1989.<BR></DIV></BODY></HTML>