Re: SWIG-PERL-Vector of pointers

On 2003.11.18 22:37, "Nair, Sanjay S" wrote:
> Types generated by const and non const vectors are different
>
> int ABC(        std::vector<unsigned char>& pvReadArray,
>                 const std::vector<unsigned char>& pvWriteArray);
>
> Any idea why the type checking is different?

When a function takes a const vector&, it is possible to pass it either  
a wrapped std::vector or a Perl array. When it takes a vector&, it will  
probably want to modify it, therefore only a wrapped std::vector can be  
passed (conversion from Perl array to std::vector would pass a *copy*  
of the original array to the function.)

If you want to make them the same, just cheat and declare the function  
in your SWIG interface file as:

int ABC(std::vector<unsigned char>& pvReadArray,
      std::vector<unsigned char>& pvWriteArray);

The generated wrappers won't break const-correctness for the compiler.

(incidentally, I was about to suggest you a better method of specifying  
which code to generate, but I just found out it doesn't work. I'll have  
to check with someone working with SWIG internals. But in the meantime,  
the above should work well enough.)

Cheers,
        Luigi
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