class Phlex::SGML

def render(renderable = nil, &)
	case renderable
	when Phlex::SGML
		renderable.call(@_buffer, context: @_context, view_context: @_view_context, parent: self, &)
	when Class
		if renderable < Phlex::SGML
			renderable.new.call(@_buffer, context: @_context, view_context: @_view_context, parent: self, &)
		end
	when Enumerable
		renderable.each { |r| render(r, &) }
	when Proc, Method
		if renderable.arity == 0
			yield_content_with_no_args(&renderable)
		else
			yield_content(&renderable)
		end
	when String
		plain(renderable)
	when nil
		yield_content(&) if block_given?
	else
		raise Phlex::ArgumentError.new("You can't render a #{renderable.inspect}.")
	end
	nil
end