Re: Constructor missing in Swig4.0 new std_vector.i ?

This is covered in the CHANGES file...

2019-02-28: wsfulton
            [Java] std::vector improvements for types that do not have a
default constructor.

            The std::vector wrappers have been changed to work by default
for elements that are
            not default insertable, i.e. have no default constructor. This
has been achieved by
            not wrapping:

              vector(size_type n);

            Previously the above had to be ignored via %ignore.

            If the above constructor is still required it can be added back
in again via %extend:

              %extend std::vector {
                vector(size_type count) { return new std::vector< T
>(count); }
              }

            Alternatively, the following wrapped constructor could be used
as it provides near-enough
            equivalent functionality:

              vector(jint count, const value_type& value);

If you want to cover different versions of SWIG, use the SWIG_VERSION
macro...

#if SWIG_VERSION >= 0x040000
              %extend std::vector {
                vector(size_type count) { return new std::vector< T
>(count); }
              }
#endif

William

On Wed, 11 Mar 2020 at 14:07, Jean-Max Redonnet <[email protected]> wrote:

> Hi,
>
> I am using Swig to wrap a C++ library with Java.
>
> With Swig3.0, I used to write
> %template(MyClass) vector<namespace::EnumType>;
> and that's all. A fully functional MyClass was created.
>
> Using Swig4.0, compilation still works but I lack the simple constructor
> vector(size_type n);
>
> Indeed, comparing std_vector.i files make appear this constructor is no
> longer present in Swig4.0:
> Swig3.0 std_vector.i  (extract)
>       vector();
>       vector(size_type n);
>       size_type size() const;
>       size_type capacity() const;
>
> Swig4.0 std_vector.i  (extract)
>       vector();
>       vector(const vector &other);
>
>       size_type capacity() const;
>
> I probably miss something but reading the documentation doesn't really
> help me (I'm not very familiar with C++, nor Swig).
>
> Any hint to solve this problem would be really appreciated. And a solution
> that works for both Swig 4.0 and Swig 3.0 would be ideal (I work with
> people that still use Swig 3.0)
>
> In advance, Thanks for any help.
>
> jMax
> _______________________________________________
> Swig-user mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/swig-user
>

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