Re: [Swig-user] duplicating strings when setting

[Mike C. <ca...@us...>]

> 
> %extend Struct {
>    Struct() {
>      Struct *s = 0;
>      StructCreator(&s);
>      return 0;
>    }
>    ~Struct() {
>      StructDestroyer(&$self);
>    }
> }
> 

Let me see if I understand this correctly. The %extend directive is a 
way to extend the Swig representation of the C struct Struct defined in
the C source file example.h. The fact that it resembles a C++ "inline" 
class definition is to leverage my understanding of C++ (I think). But 
this construct will eventually generate C code in example_wrap.c (say) for
perl (say, or python, depends on -perl or -python or whatever). It it
appears to allow for macro-like or textual substitution ($self), 
followed by "code translation" to generate the XS for perl. So it's 
really neither C not C++ but a C++-like syntax. So part of learning swig
is to learn this syntax.

If the last paragraph is a roughly correct account of what's happening, 
then I find the documentation challenging because I don't know if I'm
looking a C or C++ or the "interface language" when I'm looking at examples.

Thanks.