class RuboCop::Cop::VariableForce::VariableTable

def reference_variable(name, node)
  variable = find_variable(name)
  # In this code:
  #
  #   foo = 1 unless foo
  #
  #   (if
  #     (lvar :foo) nil
  #     (lvasgn :foo
  #       (int 1)))
  #
  # Parser knows whether the foo is a variable or method invocation.
  # This means that if a :lvar node is shown in AST, the variable is
  # assumed to be already declared, even if we haven't seen any :lvasgn
  # or :arg node before the :lvar node.
  #
  # We don't invoke #declare_variable here otherwise
  # Variable#declaration_node will be :lvar node, that is actually not.
  # So just skip.
  return unless variable
  variable.reference!(node)
  mark_variable_as_captured_by_block_if_so(variable)
end