Avoiding redefining constant Struct::ClassName warnings

singleton_struct.rb

fields = [:switch, :sha_ind, :dtdm, :utdm, :ttdm, :actual]

def create_struct name, fields
  Struct.new(name, *fields)
end

def create_singleton_struct name, fields
  if Struct::const_defined? name
    Struct.const_get name
  else
    Struct.new name, *fields
  end
end

dto = create_struct 'HomingArrangement', fields
# warning: redefining constant Struct::HomingArrangement
dto = create_struct 'HomingArrangement', fields

dto = create_singleton_struct 'SwitchHomingArrangement', fields
# no warning
dto = create_singleton_struct 'SwitchHomingArrangement', fields

Thanks!