class RuboCop::Cop::Lint::EmptyInterpolation

“result is #{some_result}”
# good
@example
“result is #{}”
# bad
@example
This cop checks for empty interpolation.

def autocorrect(node) 

def autocorrect(node)
  lambda do |collector|
    collector.remove(node.loc.expression)
  end
end

def on_dstr(node) 

def on_dstr(node)
  node.each_child_node(:begin) do |begin_node|
    add_offense(begin_node) if begin_node.children.empty?
  end
end