Re: [julia-users] How to get template value of abstract type?

[Keno Fischer]

Base.eltype{T<:Foo}(::Type{T})=T.parameters[1]

should work

On Tue, Mar 3, 2015 at 9:58 PM, Sheehan Olver <dlfivefi...@gmail.com> wrote:

> Suppose I have
>
> abstract Foo{T}
> immutable Foo1{T} <:Foo{T} end
> immutable Foo2{T} <:Foo{T} end
>
>
>
> How can I write a function that returns T given the type?  E.g.: I want to
> do
>
> Base.eltype(::Type{Foo{T}})=T
>
>
> But this won't work for eltype(Foo1{T})
>
>
>
>