class RuboCop::Cop::Lint::LiteralInInterpolation

def autocorrect(node)
  expr = node.parent.loc.expression
  value = autocorrected_value(node)
  ->(corrector) { corrector.replace(expr, value) }
end

def autocorrected_value(node)
  node.str_type? ? node.children.last : node.loc.expression.source
end

def on_dstr(node)
  node.children.select { |n| n.type == :begin }.each do |begin_node|
    final_node = begin_node.children.last
    next unless final_node
    next if special_keyword?(final_node)
    next unless LITERALS.include?(final_node.type)
    add_offense(final_node, :expression)
  end
end

def special_keyword?(node)
  # handle strings like __FILE__
  (node.type == :str && !node.loc.respond_to?(:begin)) ||
    node.loc.expression.is?('__LINE__')
end