class RuboCop::Cop::Lint::ReturnInVoidContext

end
return
def foo=(bar)
end
baz
return if bar?
foo
def initialize
# good
@example
end
return 42
def foo=(bar)
end
baz
return :qux if bar?
foo
def initialize
# bad
@example
where the value will be ignored. (initialize and setter methods)
This cop checks for the use of a return with a value in a context

def method_name(context_node) 

def method_name(context_node)
  context_node.children.first
end

def non_void_context(return_node) 

def non_void_context(return_node)
  return_node.each_ancestor(:block, :def, :defs).first
end

def on_return(return_node) 

def on_return(return_node)
  return unless return_node.descendants.any?
  context_node = non_void_context(return_node)
  return unless context_node&.def_type?
  method_name = method_name(context_node)
  return unless method_name && void_context_method?(method_name)
  add_offense(return_node.loc.keyword, message: format(message, method: method_name))
end

def setter_method?(method_name) 

def setter_method?(method_name)
  method_name.to_s.end_with?('=') && !AST::Node::COMPARISON_OPERATORS.include?(method_name)
end

def void_context_method?(method_name) 

def void_context_method?(method_name)
  method_name == :initialize || setter_method?(method_name)
end