Re: match arguments in "later" part of a C function argument list

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On Mon, 20 May 2024 at 07:43, Andy Tai <[email protected]> wrote:

> Hi, can typemaps be used to match "later" parts of the arguments of a
> C function?
> For example, if I have a C function
>
> void func(int a1, const char *str, size_t size) ;
>
> where the second and the third arguments are meant to pass in a C string.
>
> I find that if I try to apply the typical typemap
>
> %typemap(in) (const char *, size_t) {
>
Change above line to:

void func(int a1, const char *str, size_t size) ;

then you'll see the typemap contents in the generated code. You could also
use -debug-tmused to see if your typemap matches, see
http://swig.org/Doc4.2/Typemaps.html. Once you see your code in the wrapper
function, then maybe it will need further work, I'm not familar enough with
Guile to know if it will actually work.

William

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<div dir=3D"ltr"><div dir=3D"ltr"><br></div><br><div class=3D"gmail_quote">=
<div dir=3D"ltr" class=3D"gmail_attr">On Mon, 20 May 2024 at 07:43, Andy Ta=
i &lt;<a href=3D"mailto:[email protected]">[email protected]</a>&gt; wrote:<br></di=
v><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;borde=
r-left:1px solid rgb(204,204,204);padding-left:1ex">Hi, can typemaps be use=
d to match &quot;later&quot; parts of the arguments of a<br>
C function?<br>
For example, if I have a C function<br>
<br>
void func(int a1, const char *str, size_t size) ;<br>
<br>
where the second and the third arguments are meant to pass in a C string.<b=
r>
<br>
I find that if I try to apply the typical typemap<br>
<br>
%typemap(in) (const char *, size_t) {<br></blockquote><div>Change above lin=
e to:</div><div><br></div><div>void func(int a1, const char *str, size_t si=
ze) ;</div><div><br></div><div>then you&#39;ll see the typemap contents in =
the generated code. You could also use -debug-tmused to see if your typemap=
 matches, see <a href=3D"http://swig.org/Doc4.2/Typemaps.html">http://swig.=
org/Doc4.2/Typemaps.html</a>. Once you see your code in the wrapper functio=
n, then maybe it will need further work, I&#39;m not familar enough with Gu=
ile to know if it will actually work.</div><div><br></div><div>William<br><=
/div></div></div>

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