class RuboCop::Cop::Performance::FixedSize

def contains_double_splat?(node)
  return unless node.hash_type?
  node.children.any? do |child|
    child.respond_to?(:kwsplat_type?) && child.kwsplat_type?
  end
end

def contains_splat?(node)
  return unless node.array_type?
  node.children.any? do |child|
    child.respond_to?(:splat_type?) && child.splat_type?
  end
end

def on_send(node)
  counter(node) do |variable, arg|
    return if contains_splat?(variable)
    return if contains_double_splat?(variable)
    return if !arg.nil? && string_argument?(arg.first)
    if node.parent
      return if node.parent.casgn_type? || node.parent.block_type?
    end
    add_offense(node, :expression)
  end
end

def string_argument?(node)
  node && !node.str_type?
end