Module: Singleton
| Relationships & Source Files | |
| Extension / Inclusion / Inheritance Descendants | |
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Included In:
ActionDispatch::ServerTiming::Subscriber,
ActiveJob::Serializers::BigDecimalSerializer,
ActiveJob::Serializers::DateSerializer,
ActiveJob::Serializers::DateTimeSerializer,
ActiveJob::Serializers::DurationSerializer,
ActiveJob::Serializers::ModuleSerializer,
::ActiveJob::Serializers::ObjectSerializer,
::ActiveJob::Serializers::RangeSerializer,
ActiveJob::Serializers::SymbolSerializer,
ActiveJob::Serializers::TimeObjectSerializer,
ActiveJob::Serializers::TimeSerializer,
ActiveJob::Serializers::TimeWithZoneSerializer,
ActiveModel::NullMutationTracker,
::Mime::AllType,
::Mime::NullType
| |
| Defined in: | activesupport/lib/active_support/core_ext/object/duplicable.rb |
Instance Attribute Summary
-
#duplicable? ⇒ Boolean
readonly
Singletoninstances are not duplicable:
Instance Attribute Details
#duplicable? ⇒ Boolean (readonly)
Singleton instances are not duplicable:
Class.new.include(Singleton).instance.dup # TypeError (can't dup instance of singleton# File 'activesupport/lib/active_support/core_ext/object/duplicable.rb', line 57
def duplicable? false end