[C++-sig] std::string& parameter

[David Abrahams]

"Jochen Heckl" <jochen.heckl at novatrix.de> writes:

> I wan't to retrieve strings via out parameter.  Isn't there some
> predefined solution, so I do not have to export class_< std::string >
> on my own ?

What is your problem with that?

> The problem is:
>
> class A { bool DoSomethingWithString< std::string& o_String > }
                                      ^                       ^
You must mean something else, right?--^-----------------------^
These were supposed to be parens?

> class_<A>( "A" ) .def( "DoSomethingWithString",
> &A::DoSomethingWithString ) ;
>
>
> to be able to call A::DoSomethingWithString() I must also export
>
> class_< std::string >( "STLString" ) ;
>
> but I don't want to kind of "reinvent the wheel". Isn't there a
> standard solution for that ?

Considering that Python strings are immutable, no there is not.  If
you want to avoid wrapping std::string, you could add a thin wrapper
over your member function and wrap that:

     tuple DoSomethingWithString(A& self, std::string s)
     {
        bool x = self.DoSomethingWithString(s);
        return make_tuple(x, s);
     }

class_<A>( "A" )
	.def(	"DoSomethingWithString",
		DoSomethingWithString )
;

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