method_missing and splat arguments

gistfile1.rb

class A
  def method_missing(_, value, *_)
    puts "A: #{value.inspect} #{_.inspect}"
  end
  def existing1(_, value, *_)
    puts "Ae1: #{value.inspect} #{_.inspect}"
  end
  def existing2(_, value, *)
    puts "Ae2: #{value.inspect} #{_.inspect}"
  end
end

class B
  def method_missing(m, value, *_)
    puts "B: #{value.inspect} (#{m})"
  end
end

class C
  def method_missing(_, value, *args)
    puts "C: #{value.inspect} #{args.inspect}"
  end
end

class D
  def method_missing(_, value, *)
    puts "D: #{value.inspect} #{_.inspect}"
  end
end

a = A.new
b = B.new
c = C.new
d = D.new

a.one(2)               # A: nil []
a.two(2, :s)           # A: nil [:s]
a.existing1(:x, 2, 42) # Ae1: nil [42]
a.existing2(:x, 2, 42) # Ae2: 2 :x

b.one(2)               # B: 2 (one)
b.two(2, :s)           # B: 2 (two)

c.one(2)               # C: 2 []
c.two(2, :s)           # C: 2 [:s]

d.one(2)               # D: 2 :one
d.two(2, :s)           # D: 2 :two