Default arguments

[jjl]

It would be nice to be able to define a function in a protocol that uses optional arguments with \\

[OvermindDL1]

I've thought of that but the issue is such way to consider things. First, should defaults just be allowed on the protocol? Or second, should I allow implementations to have their own default args, which may have some corner cases that I considered a while back but can't remember currently. Is the first sufficient?

[jjl]

I was considering only protocols having default args here. I imagine it would work like this:

defprotocolEx FooBar, %Foo{}, for: Bar do
  def bar(x, y \\ nil)
end

Would be the equivalent of this:

defprotocolEx FooBar, %Foo{}, for: Bar do
  def bar(x), do: bar(x,nil)
  def bar(x, y)
end

[OvermindDL1]

Added it in, and I allowed protocols to override the defaults as well if so wanted. :-)

I did not implement the second style (allowing implementations to have defaults without the protocol having it set up first, it breaks the interface I'd think).