<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML xmlns="http://www.w3.org/TR/REC-html40" xmlns:v =
"urn:schemas-microsoft-com:vml" xmlns:o =
"urn:schemas-microsoft-com:office:office" xmlns:w =
"urn:schemas-microsoft-com:office:word"><HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii">
<TITLE>Message</TITLE>
<META content="MSHTML 6.00.2900.2873" name=GENERATOR>
<STYLE>@page Section1 {size: 8.5in 11.0in; margin: 1.0in 1.25in 1.0in 1.25in; }
P.MsoNormal {
FONT-SIZE: 12pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Times New Roman"
}
LI.MsoNormal {
FONT-SIZE: 12pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Times New Roman"
}
DIV.MsoNormal {
FONT-SIZE: 12pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Times New Roman"
}
A:link {
COLOR: blue; TEXT-DECORATION: underline
}
SPAN.MsoHyperlink {
COLOR: blue; TEXT-DECORATION: underline
}
A:visited {
COLOR: purple; TEXT-DECORATION: underline
}
SPAN.MsoHyperlinkFollowed {
COLOR: purple; TEXT-DECORATION: underline
}
SPAN.EmailStyle17 {
COLOR: windowtext; FONT-FAMILY: Arial; mso-style-type: personal-compose
}
DIV.Section1 {
page: Section1
}
</STYLE>
<!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></HEAD>
<BODY lang=EN-US vLink=purple link=blue>
<DIV><SPAN class=552403514-12052006><FONT face=Arial color=#0000ff size=2>Did
you try this:</FONT></SPAN></DIV>
<DIV><SPAN class=552403514-12052006><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=552403514-12052006><FONT face=Arial color=#0000ff size=2>void
g( BON::FCO& par)</FONT></SPAN></DIV>
<DIV><SPAN class=552403514-12052006><FONT face=Arial color=#0000ff
size=2>{</FONT></SPAN></DIV>
<DIV><SPAN class=552403514-12052006><FONT face=Arial color=#0000ff
size=2> // ...</FONT></SPAN></DIV>
<DIV><SPAN class=552403514-12052006><FONT face=Arial color=#0000ff
size=2>}</FONT></SPAN></DIV>
<DIV><SPAN class=552403514-12052006><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=552403514-12052006><FONT face=Arial color=#0000ff size=2>void
f( BON::FCOImpl* impl)</FONT></SPAN></DIV>
<DIV><SPAN class=552403514-12052006><FONT face=Arial color=#0000ff
size=2>{</FONT></SPAN></DIV>
<DIV><SPAN class=552403514-12052006> <FONT face=Arial
color=#0000ff size=2>g( BON::FCO( impl));</FONT></SPAN></DIV>
<DIV><SPAN class=552403514-12052006><FONT face=Arial color=#0000ff
size=2>}</FONT></SPAN></DIV>
<DIV><SPAN class=552403514-12052006><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=552403514-12052006><FONT face=Arial color=#0000ff size=2>I saw
that there is a constructor like: FCO( FCOImpl *).</FONT></SPAN></DIV>
<DIV><SPAN class=552403514-12052006><FONT face=Arial color=#0000ff
size=2>Zoli</FONT></SPAN></DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px">
<DIV></DIV>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left><FONT
face=Tahoma size=2>-----Original Message-----<BR><B>From:</B>
gme-users-bounces@list.isis.vanderbilt.edu
[mailto:gme-users-bounces@list.isis.vanderbilt.edu] <B>On Behalf Of
</B>Matthew J. Emerson<BR><B>Sent:</B> Thursday, May 11, 2006 5:55
PM<BR><B>To:</B> gme-users<BR><B>Subject:</B> [gme-users] getting a BON object
from an implementation object<BR><BR></FONT></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">In a BON 2 interpreter, I have
written a stand-along function that takes as a parameter a
BON::FCO:<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">
</SPAN></FONT><FONT face="Courier New" color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: 'Courier New'">void</SPAN></FONT><FONT
face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
writeNEDFCOPropertyAssn(<FONT color=blue><SPAN
style="COLOR: blue">const</SPAN></FONT> BON::FCO &fco, <FONT
color=blue><SPAN style="COLOR: blue">const</SPAN></FONT> std::string
&indent, std::ostringstream &out);<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">There are many places in the
interpreter when I can call it and pass it an actual
BON::FCO:<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">
</SPAN></FONT><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">std::set<Node>
nodes(<FONT color=blue><SPAN
style="COLOR: blue">this</SPAN></FONT>->getNode());<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
std::set<Node>::const_iterator
npos(nodes.begin());<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal style="TEXT-INDENT: 0.5in"><FONT face="Courier New"
color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: 'Courier New'">for</SPAN></FONT><FONT
face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">( ; npos != nodes.end();
++npos)<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal style="TEXT-INDENT: 0.5in"><FONT face="Courier New"
size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">{<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
std::ostringstream
nodeParams;<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal style="TEXT-INDENT: 0.5in"><FONT face="Courier New"
size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
writeNEDFCOPropertyAssn(node, "\t\t\t\t",
nodeParams)<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal style="TEXT-INDENT: 0.5in"><FONT face="Courier New"
size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">
...<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal style="TEXT-INDENT: 0.5in"><FONT face="Courier New"
size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">}</SPAN></FONT><FONT
face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">However, inside the definition of
a method of one of my –Impl classes, I need to call this stand-along function
and basically pass it the “this” pointer. Except “this” is an Impl object and
not a BON object:<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">
</SPAN></FONT><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'">writeNEDFCOPropertyAssn(<FONT
color=blue><SPAN style="COLOR: blue">this</SPAN></FONT>, "\t\t", nodeParams);
<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Courier New" size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Courier New'"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Except…</SPAN></FONT><FONT
face="Courier New" color=blue size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: blue; FONT-FAMILY: 'Courier New'">this</SPAN></FONT><FONT
face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"> is not a
BON::FCO. It’s a BON::FCOImpl. But the function will do the exact same thing
anyway, so I don’t want to have to write it twice just because in one case I’m
passing in a wrapper and in another case I’m passing in the implementation
object.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">How do I get a wrapped version of
an Impl object on demand without messing up the reference counting
mechanism?<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P></DIV></BLOCKQUOTE></BODY></HTML>