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[edit]	https://cppreference.com/index.php?title=Template:cpp/utility/navbar_content&action=edit
Member functions	https://en.cppreference.com/cpp/utility/optional#Member_functions
optional::optional	https://en.cppreference.com/cpp/utility/optional/optional
optional::~optional	https://en.cppreference.com/cpp/utility/optional/~optional
optional::operator=	https://en.cppreference.com/cpp/utility/optional/operator%3D
Observers	https://en.cppreference.com/cpp/utility/optional#Observers
optional::operator->optional::operator*	https://en.cppreference.com/cpp/utility/optional/operator*
optional::operator booloptional::has_value	https://en.cppreference.com/cpp/utility/optional/operator_bool
optional::value	https://en.cppreference.com/cpp/utility/optional/value
optional::value_or	https://en.cppreference.com/cpp/utility/optional/value_or
Iterators	https://en.cppreference.com/cpp/utility/optional#Iterators
optional::begin	https://en.cppreference.com/cpp/utility/optional/begin
optional::end	https://en.cppreference.com/cpp/utility/optional/end
Monadic operations	https://en.cppreference.com/cpp/utility/optional#Monadic_operations
optional::and_then	https://en.cppreference.com/cpp/utility/optional/and_then
optional::transform	https://en.cppreference.com/cpp/utility/optional/transform
optional::or_else	https://en.cppreference.com/cpp/utility/optional/or_else
Modifiers	https://en.cppreference.com/cpp/utility/optional#Modifiers
optional::emplace	https://en.cppreference.com/cpp/utility/optional/emplace
optional::swap	https://en.cppreference.com/cpp/utility/optional/swap
optional::reset	https://en.cppreference.com/cpp/utility/optional/reset
Non-member functions	https://en.cppreference.com/cpp/utility/optional#Non-member_functions
operator==operator!=operatoroperator>=operator<=>	https://en.cppreference.com/cpp/utility/optional/operator_cmp
make_optional	https://en.cppreference.com/cpp/utility/optional/make_optional
swap(std::optional)	https://en.cppreference.com/cpp/utility/optional/swap2
Deduction guides	https://en.cppreference.com/cpp/utility/optional/deduction_guides
Helper classes	https://en.cppreference.com/cpp/utility/optional#Helper_classes
hash	https://en.cppreference.com/cpp/utility/optional/hash
nullopt_t	https://en.cppreference.com/cpp/utility/optional/nullopt_t
in_place_t	https://en.cppreference.com/cpp/utility/in_place
bad_optional_access	https://en.cppreference.com/cpp/utility/optional/bad_optional_access
Helper objects	https://en.cppreference.com/cpp/utility/optional#Helpers
nullopt	https://en.cppreference.com/cpp/utility/optional/nullopt
in_place	https://en.cppreference.com/cpp/utility/in_place
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	https://en.cppreference.com/cpp/header/optional
nested within	https://en.cppreference.com/cpp/language/object#Address
contextually converted to bool	https://en.cppreference.com/cpp/language/implicit_conversion#Contextual_conversions
view	https://en.cppreference.com/cpp/ranges/view
1 Template parameters	https://en.cppreference.com/cpp/utility/optional#Template_parameters
2 Nested types	https://en.cppreference.com/cpp/utility/optional#Nested_types
3 Data members	https://en.cppreference.com/cpp/utility/optional#Data_members
4 Member functions	https://en.cppreference.com/cpp/utility/optional#Member_functions
4.1 Iterators	https://en.cppreference.com/cpp/utility/optional#Iterators
4.2 Observers	https://en.cppreference.com/cpp/utility/optional#Observers
4.3 Monadic operations	https://en.cppreference.com/cpp/utility/optional#Monadic_operations
4.4 Modifiers	https://en.cppreference.com/cpp/utility/optional#Modifiers
5 Non-member functions	https://en.cppreference.com/cpp/utility/optional#Non-member_functions
6 Helper classes	https://en.cppreference.com/cpp/utility/optional#Helper_classes
7 Helpers	https://en.cppreference.com/cpp/utility/optional#Helpers
8 Helper specializations	https://en.cppreference.com/cpp/utility/optional#Helper_specializations
9 Deduction guides	https://en.cppreference.com/cpp/utility/optional#Deduction_guides
10 Notes	https://en.cppreference.com/cpp/utility/optional#Notes
11 Example	https://en.cppreference.com/cpp/utility/optional#Example
12 Defect reports	https://en.cppreference.com/cpp/utility/optional#Defect_reports
13 See also	https://en.cppreference.com/cpp/utility/optional#See_also
Destructible	https://en.cppreference.com/cpp/named_req/Destructible
LegacyRandomAccessIterator	https://en.cppreference.com/cpp/named_req/RandomAccessIterator
ConstexprIterator	https://en.cppreference.com/cpp/named_req/ConstexprIterator
contiguous_iterator	https://en.cppreference.com/cpp/iterator/contiguous_iterator
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contiguous_iterator	https://en.cppreference.com/cpp/iterator/contiguous_iterator
Container	https://en.cppreference.com/cpp/named_req/Container
(constructor)	https://en.cppreference.com/cpp/utility/optional/optional
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operator boolhas_value	https://en.cppreference.com/cpp/utility/optional/operator_bool
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202110L	https://en.cppreference.com/cpp/compiler_support/23#cpp_lib_optional_202110L
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__cpp_lib_optional_range_support	https://en.cppreference.com/cpp/feature_test#cpp_lib_optional_range_support
202406L	https://en.cppreference.com/cpp/compiler_support/26#cpp_lib_optional_range_support_202406L
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