OK thanks Tim!
Is there some way/plan to fix this in the future, to make it more
convenient?
Andy
On Wednesday, February 10, 2016 at 10:27:38 PM UTC+10, Tim Holy wrote:
>
> Slightly modifying an example from the docs:
>
> julia> function mysub2ind_gen(N)
> ex = :(I[$N] - 1)
> for i = N-1:-1:1
> ex = :(I[$i] - 1 + dims[$i]*$ex)
> end
> return :($ex + 1)
> end
> mysub2ind_gen (generic function with 1 method)
>
> julia> @generated function mysub2ind{N}(dims::NTuple{N}, I::Integer...)
> length(I) == N || error("wrong number of indexes")
> mysub2ind_gen(N)
> end
> mysub2ind (generic function with 1 method)
>
> julia> mysub2ind_gen(3)
> :(((I[1] - 1) + dims[1] * ((I[2] - 1) + dims[2] * (I[3] - 1))) + 1)
>
> julia> mysub2ind((5,5,5), 1, 2, 3)
> 56
>
> julia> sub2ind((5,5,5), 1, 2, 3)
> 56
>
>
> On Wednesday, February 10, 2016 03:31:15 AM Jeffrey Sarnoff wrote:
> > Tim -- would you repeat that with some simple content illustrative of a
> > useful use for generation --- thx
> >
> > On Wednesday, February 10, 2016 at 5:27:12 AM UTC-5, Tim Holy wrote:
> > > On Tuesday, February 09, 2016 08:52:22 PM Andy Ferris wrote:
> > > > What's the best way to find the code generated by a @generated
> function?
> > >
> > > This isn't easy unless you (or the author) provides a function to do
> so:
> > > @generated function foo(x, y)
> > >
> > > foo_generator(x, y)
> > >
> > > end
> > >
> > > function foo_generator{Tx,Ty}(::Type{Tx}, ::Type{Ty})
> > >
> > > # generate and return the expression for the function body
> > >
> > > end
> > >
> > > Then you can call `foo_generator(typeof(x), typeof(y))` to see the
> > > returned
> > > code.
> > >
> > > Best,
> > > --Tim
>
>
