Re: Wrapping long doubles in python

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Thanks John,

I tried 4.3.0 and had the exact same problem, I'm using python 3.9 on
windows with visual studio 2022 Community Edition.
Trying python 3.12 produced the same errors (and a few more that I didn't
get to investigate);

Thanks again for your help and hope that helps track down the issue,
-Ayman


On Mon, Feb 3, 2025 at 8:22=E2=80=AFAM John Wyatt <[email protected]> wrote=
:

> Hello Ayman,
>
> You did not include important info, such as your platform (Windows or
> Mac?), Python and Visual Studio version.
>
> Would you please try 4.3.0 or the git: https://github.com/swig/swig.git
> to see if the issue is on the latest version?
>
> On Thu, Jan 30, 2025 at 5:34=E2=80=AFPM Ayman Habib <[email protected]> =
wrote:
>
>> Hello,
>>
>> I'm upgrading the swig version we use from 4.1.1 to 4.2 and running into
>> a problem because of the macro below (it appears in a header file from a
>> third party library that I can't change), but I get the same behavior
>> inserting the line in my .i file:
>>
>> #define MY_PI 3.1415926535897L
>>
>> The resulting python code doesn't compile:
>>
>>   SWIG_Python_SetConstant(d,
>> "MY_PI",SWIG_NewPointerObj(SWIG_as_voidptr(&3.1415926535897),SWIGTYPE_p_=
long_double,
>> 0 ));
>>
>> The compilation error follows:
>>
>> '&' on constant (C2101 in visual studio).
>>
>> Any suggestions for working around this issue?
>>
>> Thanks,
>> -Ayman
>> _______________________________________________
>> Swig-user mailing list
>> [email protected]
>> https://lists.sourceforge.net/lists/listinfo/swig-user
>>
>

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<div dir=3D"ltr">Thanks John,=C2=A0<div><br></div><div>I tried 4.3.0 and ha=
d the exact same problem, I&#39;m using python 3.9 on windows with visual s=
tudio=C2=A02022 Community Edition.=C2=A0</div><div>Trying python 3.12 produ=
ced the same errors (and a few more that I didn&#39;t get to investigate);<=
/div><div><br></div><div>Thanks again for your help and hope that helps tra=
ck down the issue,</div><div>-Ayman</div><div><br></div></div><br><div clas=
s=3D"gmail_quote gmail_quote_container"><div dir=3D"ltr" class=3D"gmail_att=
r">On Mon, Feb 3, 2025 at 8:22=E2=80=AFAM John Wyatt &lt;<a href=3D"mailto:=
[email protected]">[email protected]</a>&gt; wrote:<br></div><blockquote cl=
ass=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid=
 rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr"><div>Hello Ayman,</div=
><div><br></div><div>You did not include important info, such as your platf=
orm (Windows or Mac?), Python and Visual Studio version.<br></div><div><br>=
</div><div>Would you please try 4.3.0 or the git: <a href=3D"https://github=
.com/swig/swig.git" target=3D"_blank">https://github.com/swig/swig.git</a> =
to see if the issue is on the latest version?<br></div></div><br><div class=
=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Thu, Jan 30, 2025=
 at 5:34=E2=80=AFPM Ayman Habib &lt;<a href=3D"mailto:[email protected]" t=
arget=3D"_blank">[email protected]</a>&gt; wrote:<br></div><blockquote cla=
ss=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid =
rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr">Hello,<br><br>I&#39;m u=
pgrading the swig version we use from 4.1.1 to 4.2 and running into a probl=
em because of the macro below (it appears in a header file from a third par=
ty library that I can&#39;t change), but I get the same behavior inserting =
the line in my .i file:<br><br>#define MY_PI 3.1415926535897L<br><br>The re=
sulting python code doesn&#39;t compile:<br><br>=C2=A0 SWIG_Python_SetConst=
ant(d, &quot;MY_PI&quot;,SWIG_NewPointerObj(SWIG_as_voidptr(&amp;3.14159265=
35897),SWIGTYPE_p_long_double, 0 ));<div><br></div><div>The compilation err=
or follows:=C2=A0<br><br>&#39;&amp;&#39; on constant (C2101 in visual studi=
o).<br><br>Any suggestions for working around this issue?</div><div><br></d=
iv><div>Thanks,</div><div>-Ayman</div></div>
_______________________________________________<br>
Swig-user mailing list<br>
<a href=3D"mailto:[email protected]" target=3D"_blank">Swig-u=
[email protected]</a><br>
<a href=3D"https://lists.sourceforge.net/lists/listinfo/swig-user" rel=3D"n=
oreferrer" target=3D"_blank">https://lists.sourceforge.net/lists/listinfo/s=
wig-user</a><br>
</blockquote></div>
</blockquote></div>

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_______________________________________________
Swig-user mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/swig-user

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