Is there a way to make this backwards compatible with latest v0.3 ? I find
typealias constructors extremely handy to extend the behavior of existing
recursive constructors (LinkedList here).
Here is a minimal use case requiring DataStructures and Compat:
immutable Literal
symbol::Symbol
level::Int
end
typealias SymbolInt @compat(Tuple{Symbol,Int})
Literal(tup::SymbolInt) = Literal(tup[1], tup[2])
Literal(sym::Symbol) = Literal(sym, 1)
typealias MyList LinkedList{Literal}
MyList() = nil(Literal)
MyList(head::Literal, tail...) = cons(head, VariableKey(tail...))
MyList(head::Union(SymbolInt,Symbol), tail...) = cons(Literal(head),
VariableKey(tail...))
On v0.4, this code makes the MyList type a synonym of LinkedList{Literal},
without having to explicitly construct a Literal object for every element
in the list a priori.
What can I do ?
Vincent.
Le samedi 2 mai 2015 20:43:58 UTC+2, Mauro a écrit :
>
> You need to be on 0.4 to do this.
>
> On Sat, 2015-05-02 at 20:40, Krishna Subramanian <[email protected]
> <javascript:>> wrote:
> > I would like to know how to do something like this-
> > typealias Corpus Array{Int,1}
> >
> > and write a constructor for it. Currently, if I do -
> >
> > Corpus() = Array(Int,0)
> >
> > I get-
> >
> > ERROR: cannot define function Corpus; it already has a value
> >
> > I am sure others have encountered this problem before. I went through
> > https://github.com/JuliaLang/julia/issues/1470 but I am still not able
> to
> > figure out what is the issue involved.
> >
> > Thanks,
> > Krishna
>
>
