Re: [pygccxml-development] [FT]input_t class - new vision.

[Roman Y. <rom...@gm...>]

On 9/14/06, Matthias Baas <ba...@ir...> wrote:
> Roman Yakovenko wrote:
> > So how it is related to "input_t" ? "input_t" transformer removes
> > reference or pointer
> > from the argument type. In my case I want to modify the argument type
> > too, but I also
> > want to specify the new type. Same logic is applied on return type.
> >
> > May be we can change\extend input_t class ( and rename it ) so it will
> > provide this functionality?
>
> What name and new construction arguments do you suggest?
>
> This might also be an example where it could actually be useful to apply
> several transformers to one argument (I haven't had such a case yet).
> For example, if there would be a policy remove_const_t you could apply
> both, input_t and remove_const_t, to the same argument. I think this
> should even work already with the current version.

from pygccxml import declarations
type_transformation_t ?

def __init__( self, arg_id, transformation=None ):
    self.arg_id = arg_id
    if None is self.transformation:
        #by default just remove reference
        #because I expect this will be applied to immutable passed by ref
        self.transformation = lambda type_:
declarations.remove_reference( type_ )
    elif is_callable( transformation ):
        #let user define the transformation
        self.transformation = transformation
    else:
        #user already knows what he wants, so we will just use it
        assert isinstance( transformation, declarations.type_t )
        self.transformation = lambda type_: transformation

transf = type_transformation_t( 1
                  , lambda type_: declarations.remove_reference(

declarations.remove_const( type_ ) ) )

Something like this.

-- 
Roman Yakovenko
C++ Python language binding
http://www.language-binding.net/