Le mardi 19 avril 2016 à 06:58 -0700, Matt Bauman a écrit :
> That's https://github.com/JuliaLang/julia/pull/11242. Another common
> workaround is a generated function (but the wrapper function is
> better if you don't need other generated functionality):
>
> @generated function f(x...)
> N = length(x)
> :(Array{Int, $N})
> end
Perfect, thanks. I must say I never really understood what that giant
PR was about, except that it sounded interesting.
Regards
> > Hi!
> >
> > I'm looking for the recommended way of getting type inference to
> > determine the number of elements passed via varargs.
> >
> > I guess a code snippet is better than a thousand words: in the
> > following function, the type of a isn't inferred correctly.
> >
> > function f(x...)
> > N = length(x)
> > a = Array{Int, N}()
> > # ...
> > end
> >
> > Using a wrapper function fixes the type instability:
> >
> > g(x...) = g(x)
> > function g{N}(x::NTuple{N})
> > a = Array{Int, N}()
> > #
> > ...
> > end
> >
> > Is there a better solution than this workaround?
> >
> >
> > Regards
