Re: [Boost-users] creating lambda expressions incrementally

From: Gottlob Frege (gottlobfrege_at_[hidden])
Date: 2006-10-20 14:42:49

On 10/20/06, Arnaldur Gylfason <arnaldur.gylfason_at_[hidden]> wrote:
>
>
> >I think you are trying to achieve an impossible thing.  Compiler is the
> one
> >to
> >create the types.  You can control the compiler, so that it creates the
> >types
> >based on a non-trivial algorithm, but all of this should be done at
> compile
> >time,
> >and based on compile-time input: types and constants hardcoded into your
> >program.
> >By the runtime it's over -- you can't create the types based on the
> runtime
> >string value.
> >The typeof solves the problem because it works at compile time.
>
> Yes I have come to the same conclusion. Thanks for your response.
> Some kind of eval would come in handy. Dynamic typing as in Python would
> also be a blessing here.
> Of course it would be possible to solve this by calling Python but it
> would be an expensive function call!

If C++ had dynamic typing and eval, etc, it would probably be an expensive
call as well.  It doesn't come for free.

cheers
>
> Arnaldur
>

Tony