Re: [Boost-users] [tuple] How to manipulate the types

Adrián Etchevarne ha escrito:

Problem: How can I get a tuple type from a tuples::cons<> list ? example: given the type: cons > >

obtain tuple

Real problem: I need to insert a type T at the beginning of a tuple, how I can do this?

example given the type T and tuple, obtain a tuple

Thanks in advance, Adrián

Hi Adrián, I think you've got to resort to brute force, although Boost.PP helps a lot with this kind of tasks. Please find attached a possible implementation of a tuple_from_cons helper metafunction, though I'm sure the PP experts out there could come out with simpler and nicer formulations. Joaquín M López Muñoz Telefónica, Investigación y Desarrollo ___________________________________________________________________________ Antes de imprimir este mensaje, asegúrese de que es necesario. La mejora del medio ambiente empieza en nuestro día a día. ___________________________________________________________________________