[C++-sig] Re: Some questions ...

[David Abrahams]

"Mike Thompson" <mike.thompson at day8.com.au> writes:

> Q2.  The following function works, but I'm left wondering if there's not a
>          better way.  It takes a list of ints and returns the equivalent
> vector<int>.
>
>          vector<int>  makeVectorFromList(list l)
>          {
>              boost::python::object olen = l.attr("__len__")();
>              int len = extract<int>(olen)();
>
>              vector<int> ret(len);
>
>              for (int i = 0; i < len; ++i) {
>                  extract<int>  get_int(l[i]);
>                  if (!get_int.check()) {
>                      PyErr_SetString(PyExc_TypeError, "makeVectorFromList()
> expects a list of ints");
>                      throw error_already_set();
>                  }
>                  ret[i] = get_int();
>              }
>             return ret;
>          }

What about that approach would you like to see improved?  In other
words, why are you left wondering if there's a "better way"?

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com