> OK, so that is the long way to do it. > I just thought that, since multiple dispatch does not work on keyword > arguments, they should by definition be the same for all methods, no? > Otherwise you end up with keyword arguments throwing an error because the > type of a different argument changing, an error that is hard to debug > because the kwargs do not show up under a methods(foo) call. Seems to me > such a potentially ripe source of bugs that julia would have an inbuilt (or > at least recommended ideomatic) way of dealing with it.
No, I don't think that would help either as keywords are not necessarily the same for different methods. What you can do is: f(x,y; kws...) = (deal_with_kws(kws); ...) Or use metaprogramming to make sure all you keywords are the same. You should consider using an option structure. I think Parameters.jl can help with that: @with_kw immutable Opts t=5 u=9 end f(x,y, opts=Opts()) = ... f(x, opts=Opts()) = ... ... # call with default opts f(x,y) # call with non-default opts f(x,y, Opts(t=7)) > Den onsdag den 6. januar 2016 kl. 00.09.10 UTC+1 skrev Jeffrey Sarnoff: >> >> If you want all methods to use the same keyword arguments, define each >> method with the same keyword arguments. You can declare keyword arguments' >> types. >> >> function foo(a::Int; test::Bool = true) >> if test >> a >> else >> 0 >> end >> end >> >> function foo(a::AbstractFloat; test::Bool = true) >> if test >> a >> else >> 100.0 >> end >> end >> >> foo(1) >> 1 >> foo(1,false) >> 0 >> foo(1,"grue") >> ERROR >> >> foo(1.0) >> 1.0 >> foo(1.0,false) >> 100.0 >> foo(1.0,"grue") >> ERROR >> >> >> >> On Tuesday, January 5, 2016 at 4:30:14 PM UTC-5, Michael Borregaard wrote: >>> >>> Hi, sorry I have a simple question, I have tried to RTFM. >>> >>> If I have a function with multiple methods and keyword arguments, all >>> methods should share the same keyword args, right? How do I write this? >>> >>> function foo(a::Int; test = true) >>> 2+a >>> end >>> >>> function foo(a::AbstractFloat #how do I continue this line? >>> >>> In my real-world example I have multiple methods and a long list of >>> keyword arguments. >>> >>> Thanks! >>> >>
