Defining multiple interfaces for one type

[ReubenJ]

The docs for @implements mention the ability to define a type as inheriting from multiple interfaces by supplying a vector of interfaces, but it appear that the macro only handles the cases: Interface{:option} or plain, single Interface.

Am I missing something?

The docstring mentioning it:

Interfaces.jl/src/implements.jl

Lines 53 to 54 in b6191a0

	The macro can only be used once per module for any one type. To define
	multiple interfaces a type implements, combine them in square brackets.

The logic for handling the interface argument to the macro:

Interfaces.jl/src/implements.jl

Lines 70 to 80 in b6191a0

	if interface isa Expr && interface.head == :curly
	interfacetype = interface.args[1]
	optional_keys = interface.args[2]
	# Allow a single Symbol instead of a Tuple
	if optional_keys isa QuoteNode
	optional_keys = (optional_keys.value,)
	end
	else
	interfacetype = interface
	optional_keys = ()
	end

Thanks for your work on this package! Really appreciate the thought going into it.

[rafaqz]

I think the doc is just old and wrong. You can call @implements for multiple interfaces with the same object.

[ReubenJ]

Got it. Seems like an easy thing to support, right? I could make a quick PR for it if you like.

[rafaqz]

I may be cleaner just to do separate calls? I'm ok with needing one line per interface.