class Rubocop::Cop::Lint::ShadowingOuterLocalVariable

“shadowing outer local variable - foo” from ‘ruby -cw`.
This is a mimic of the warning
for block arguments or block local variables.
This cop looks for use of the same name as outer local variables

def before_declaring_variable(variable) 

def before_declaring_variable(variable)
  return if variable.name.to_s.start_with?('_')
  outer_local_variable = variable_table.find_variable(variable.name)
  return unless outer_local_variable
  message = sprintf(MSG, variable.name)
  warning(variable.declaration_node, :expression, message)
end

def investigate(processed_source) 

def investigate(processed_source)
  inspect_variables(processed_source.ast)
end