How to use C++ in perl WITH OUT INLINE

llancet has asked for the wisdom of the Perl Monks concerning the following question:

I guess someone will tell me Inline::CPP, but for some reason I'm not going to use it. I've also read the code of Inline::CPP, but failed to understand it.

I know perl has XS to work with C functions. However, how to use XS with the OO features in C++? Can I wrap a method indirectly like this?

The C++ class:

class Foo {
    void some_method(int arg) {
        do_something;
    }
};
[download]

And a C wrapper:

void some_method(SV* self, int arg) {
    // can I store the pointer as IV?
    SV* inner = SvRV(self);
    Foo* obj = (Foo*) SvIV(inner);
    obj->some_method(arg);
}
[download]

and then simply write XS for that C wrapper?

Comment on How to use C++ in perl WITH OUT INLINE Select or Download Code

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Re: How to use C++ in perl WITH OUT INLINE by biohisham (Priest) on Jun 25, 2011 at 04:55 UTC
Take a look at perlxstut and perlxs. Basically, the h2xs utility allows you to create a .xs file - that can connect your Perl code with C functions because it holds the routines required - so using it in conjunction with the XSUBPP program gets you to transit from .xs to C code in Perl ... David R. Gergen said "We know that second terms have historically been marred by hubris and by scandal." and I am a two y.o. monk today :D, June,12th, 2011...	[reply] [d/l]
Re: How to use C++ in perl WITH OUT INLINE by Anonymous Monk on Jun 25, 2011 at 06:27 UTC
I guess someone will tell me Inline::CPP, but for some reason I'm not going to use it. Go ahead and use it, so you can see the XS it generates, because that is all Inline does, it saves you from writing some basic XS. Oh look, InlineX::CPP2XS - Convert from Inline C++ code to XS. See ExtEmbPerlSrc/chap6/6.8.1/Coordinate.xs from Manning: Extending and Embedding Perl	[reply]
Re: How to use C++ in perl WITH OUT INLINE by zentara (Archbishop) on Jun 25, 2011 at 14:18 UTC
In case you havn't already looked at it: SWIG for C++ and Perl I'm not really a human, but I play one on earth. Old Perl Programmer Haiku ................... flash japh	[reply]
Re^2: How to use C++ in perl WITH OUT INLINE by tod222 (Pilgrim) on Jun 26, 2011 at 05:37 UTC
Another recommendation for SWIG. I chose to use SWIG since it seemed much easier than learning the guts of XS. In addition to the paper linked by zentara, which is a bit old, you'll also want to consult the SWIG and Perl5 chapter in the manual from the documentation on the SWIG website.	[reply]
Re: How to use C++ in perl WITH OUT INLINE by thirdm (Sexton) on Jun 25, 2011 at 11:42 UTC
I noticed yesterday on best nodes of the year a good post by dextius you'll want to read: Interfacing Perl with C++, using XS, with external files, and using the STL as parameters and return values. Read the comments too. There's something called XS++ associated with the Perl Wxwindows bindings project that sounds quite promising.	[reply]


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