This may do what you want (snippet from JuMP):
if isdir(Pkg.dir("ArrayViews"))
eval(Expr(:import,:ArrayViews))
const subarr = ArrayViews.view
else
const subarr = Base.sub
end
On Tuesday, August 19, 2014 7:38:27 PM UTC-6, Júlio Hoffimann wrote:
>
> Hi Joey,
>
>> It’s a bit ugly, but this should work:
>>
>> try
>> eval(Expr(:import, :ImageView))
>> global view = ImageView.view
>> catch err
>> @show err
>> # fallback to nothing
>> global view = view(args...; kargs...) = (nothing, nothing)
>> end
>>
>> Unfortunately it doesn't work:
>
> err => UndefVarError(:ImageView)
> err => ErrorException("invalid redefinition of constant view")
>
> Júlio.
>
