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optional::optionalhttps://www.cppreference.com/cpp/utility/optional/optional
optional::~optionalhttps://www.cppreference.com/cpp/utility/optional/~optional
optional::operator=https://www.cppreference.com/cpp/utility/optional/operator%3D
Observershttps://www.cppreference.com/cpp/utility/optional#Observers
optional::operator->optional::operator*https://www.cppreference.com/cpp/utility/optional/operator*
optional::operator booloptional::has_valuehttps://www.cppreference.com/cpp/utility/optional/operator_bool
optional::valuehttps://www.cppreference.com/cpp/utility/optional/value
optional::value_orhttps://www.cppreference.com/cpp/utility/optional/value_or
Iteratorshttps://www.cppreference.com/cpp/utility/optional#Iterators
optional::beginhttps://www.cppreference.com/cpp/utility/optional/begin
optional::endhttps://www.cppreference.com/cpp/utility/optional/end
Monadic operationshttps://www.cppreference.com/cpp/utility/optional#Monadic_operations
optional::and_thenhttps://www.cppreference.com/cpp/utility/optional/and_then
optional::transformhttps://www.cppreference.com/cpp/utility/optional/transform
optional::or_elsehttps://www.cppreference.com/cpp/utility/optional/or_else
Modifiershttps://www.cppreference.com/cpp/utility/optional#Modifiers
optional::emplacehttps://www.cppreference.com/cpp/utility/optional/emplace
optional::swaphttps://www.cppreference.com/cpp/utility/optional/swap
optional::resethttps://www.cppreference.com/cpp/utility/optional/reset
Non-member functionshttps://www.cppreference.com/cpp/utility/optional#Non-member_functions
operator==operator!=operatoroperator>=operator<=>https://www.cppreference.com/cpp/utility/optional/operator_cmp
make_optionalhttps://www.cppreference.com/cpp/utility/optional/make_optional
swap(std::optional)https://www.cppreference.com/cpp/utility/optional/swap2
Deduction guideshttps://www.cppreference.com/cpp/utility/optional/deduction_guides
Helper classeshttps://www.cppreference.com/cpp/utility/optional#Helper_classes
hashhttps://www.cppreference.com/cpp/utility/optional/hash
nullopt_thttps://www.cppreference.com/cpp/utility/optional/nullopt_t
in_place_thttps://www.cppreference.com/cpp/utility/in_place
bad_optional_accesshttps://www.cppreference.com/cpp/utility/optional/bad_optional_access
Helper objectshttps://www.cppreference.com/cpp/utility/optional#Helpers
nullopthttps://www.cppreference.com/cpp/utility/optional/nullopt
in_placehttps://www.cppreference.com/cpp/utility/in_place
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nested withinhttps://www.cppreference.com/cpp/language/object#Address
contextually converted to boolhttps://www.cppreference.com/cpp/language/implicit_conversion#Contextual_conversions
viewhttps://www.cppreference.com/cpp/ranges/view
1 Template parametershttps://www.cppreference.com/cpp/utility/optional#Template_parameters
2 Nested typeshttps://www.cppreference.com/cpp/utility/optional#Nested_types
3 Data membershttps://www.cppreference.com/cpp/utility/optional#Data_members
4 Member functionshttps://www.cppreference.com/cpp/utility/optional#Member_functions
4.1 Iteratorshttps://www.cppreference.com/cpp/utility/optional#Iterators
4.2 Observershttps://www.cppreference.com/cpp/utility/optional#Observers
4.3 Monadic operationshttps://www.cppreference.com/cpp/utility/optional#Monadic_operations
4.4 Modifiershttps://www.cppreference.com/cpp/utility/optional#Modifiers
5 Non-member functionshttps://www.cppreference.com/cpp/utility/optional#Non-member_functions
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7 Helpershttps://www.cppreference.com/cpp/utility/optional#Helpers
8 Helper specializationshttps://www.cppreference.com/cpp/utility/optional#Helper_specializations
9 Deduction guideshttps://www.cppreference.com/cpp/utility/optional#Deduction_guides
10 Noteshttps://www.cppreference.com/cpp/utility/optional#Notes
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12 Defect reportshttps://www.cppreference.com/cpp/utility/optional#Defect_reports
13 See alsohttps://www.cppreference.com/cpp/utility/optional#See_also
Destructiblehttps://www.cppreference.com/cpp/named_req/Destructible
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