Yes, I guess this would work. I'm not keen on the function names proposed
there, as the same ones are used in Base to access fields of objects, but
an interface similar to `nfields`, `getfield`, `fieldtype` where `field`
has been replace by `param` would work.
-erik
On Fri, Sep 11, 2015 at 4:02 PM, Mauro <mauro...@runbox.com> wrote:
> The interface Matt is prototyping for Tuple{}'s
> https://github.com/mbauman/Tuples.jl
> could (should?) be expanded for any type-parameters. (Or does it already
> work?)
>
> On Fri, 2015-09-11 at 21:54, David Gold <david.gol...@gmail.com> wrote:
> > I'm not convinced it's more Julian to use such a helper function, since
> it
> > will needlessly compile a different method for each distinct set of
> > parameters. Directly accessing the `parameter` field of the type in
> > question avoids this.
> >
> > On Friday, September 11, 2015 at 12:30:16 PM UTC-7, Josh Langsfeld wrote:
> >>
> >> You can access the 'parameters' field of a type instance object. But the
> >> standard Julian way to get type parameters is to just define a helper
> >> function:
> >>
> >> typeparams{A,B}(::Type{T{A,B}}) = A,B
> >>
> >> On Friday, September 11, 2015 at 3:20:17 PM UTC-4, Erik Schnetter wrote:
> >>>
> >>> Is there a function in Julia that allows accessing the parameters of a
> >>> type?
> >>>
> >>> For example, if I have
> >>>
> >>> type T{A,B} end
> >>>
> >>> then I'd like a way to convert `T{Int, Char}` to `(Int, Char)`.
> >>>
> >>> In other words, is there a way to get at the contents of `DataType`
> >>> objects?
> >>>
> >>> Thanks,
> >>> -erik
> >>>
> >>> --
> >>> Erik Schnetter <schn...@gmail.com>
> >>> http://www.perimeterinstitute.ca/personal/eschnetter/
> >>>
> >>
>
>
--
Erik Schnetter <schnet...@gmail.com>
http://www.perimeterinstitute.ca/personal/eschnetter/
