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partial_order	http://en.cppreference.com/cpp/utility/compare/partial_order
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rel_ops::operator!=rel_ops::operator>	http://en.cppreference.com/cpp/utility/rel_ops/operator_cmp
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tuple_element	http://en.cppreference.com/cpp/utility/tuple_element
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[edit]	https://cppreference.com/index.php?title=Template:cpp/utility/navbar_content&action=edit
Member functions	http://en.cppreference.com/cpp/utility/optional#Member_functions
optional::optional	http://en.cppreference.com/cpp/utility/optional/optional
optional::~optional	http://en.cppreference.com/cpp/utility/optional/~optional
optional::operator=	http://en.cppreference.com/cpp/utility/optional/operator%3D
Observers	http://en.cppreference.com/cpp/utility/optional#Observers
optional::operator->optional::operator*	http://en.cppreference.com/cpp/utility/optional/operator*
optional::operator booloptional::has_value	http://en.cppreference.com/cpp/utility/optional/operator_bool
optional::value	http://en.cppreference.com/cpp/utility/optional/value
optional::value_or	http://en.cppreference.com/cpp/utility/optional/value_or
Iterators	http://en.cppreference.com/cpp/utility/optional#Iterators
optional::begin	http://en.cppreference.com/cpp/utility/optional/begin
optional::end	http://en.cppreference.com/cpp/utility/optional/end
Monadic operations	http://en.cppreference.com/cpp/utility/optional#Monadic_operations
optional::and_then	http://en.cppreference.com/cpp/utility/optional/and_then
optional::transform	http://en.cppreference.com/cpp/utility/optional/transform
optional::or_else	http://en.cppreference.com/cpp/utility/optional/or_else
Modifiers	http://en.cppreference.com/cpp/utility/optional#Modifiers
optional::emplace	http://en.cppreference.com/cpp/utility/optional/emplace
optional::swap	http://en.cppreference.com/cpp/utility/optional/swap
optional::reset	http://en.cppreference.com/cpp/utility/optional/reset
Non-member functions	http://en.cppreference.com/cpp/utility/optional#Non-member_functions
operator==operator!=operatoroperator>=operator<=>	http://en.cppreference.com/cpp/utility/optional/operator_cmp
make_optional	http://en.cppreference.com/cpp/utility/optional/make_optional
swap(std::optional)	http://en.cppreference.com/cpp/utility/optional/swap2
Deduction guides	http://en.cppreference.com/cpp/utility/optional/deduction_guides
Helper classes	http://en.cppreference.com/cpp/utility/optional#Helper_classes
hash	http://en.cppreference.com/cpp/utility/optional/hash
nullopt_t	http://en.cppreference.com/cpp/utility/optional/nullopt_t
in_place_t	http://en.cppreference.com/cpp/utility/in_place
bad_optional_access	http://en.cppreference.com/cpp/utility/optional/bad_optional_access
Helper objects	http://en.cppreference.com/cpp/utility/optional#Helpers
nullopt	http://en.cppreference.com/cpp/utility/optional/nullopt
in_place	http://en.cppreference.com/cpp/utility/in_place
[edit]	https://cppreference.com/index.php?title=Template:cpp/utility/optional/navbar_content&action=edit
	http://en.cppreference.com/cpp/header/optional
nested within	http://en.cppreference.com/cpp/language/object#Address
contextually converted to bool	http://en.cppreference.com/cpp/language/implicit_conversion#Contextual_conversions
view	http://en.cppreference.com/cpp/ranges/view
1 Template parameters	http://en.cppreference.com/cpp/utility/optional#Template_parameters
2 Nested types	http://en.cppreference.com/cpp/utility/optional#Nested_types
3 Data members	http://en.cppreference.com/cpp/utility/optional#Data_members
4 Member functions	http://en.cppreference.com/cpp/utility/optional#Member_functions
4.1 Iterators	http://en.cppreference.com/cpp/utility/optional#Iterators
4.2 Observers	http://en.cppreference.com/cpp/utility/optional#Observers
4.3 Monadic operations	http://en.cppreference.com/cpp/utility/optional#Monadic_operations
4.4 Modifiers	http://en.cppreference.com/cpp/utility/optional#Modifiers
5 Non-member functions	http://en.cppreference.com/cpp/utility/optional#Non-member_functions
6 Helper classes	http://en.cppreference.com/cpp/utility/optional#Helper_classes
7 Helpers	http://en.cppreference.com/cpp/utility/optional#Helpers
8 Helper specializations	http://en.cppreference.com/cpp/utility/optional#Helper_specializations
9 Deduction guides	http://en.cppreference.com/cpp/utility/optional#Deduction_guides
10 Notes	http://en.cppreference.com/cpp/utility/optional#Notes
11 Example	http://en.cppreference.com/cpp/utility/optional#Example
12 Defect reports	http://en.cppreference.com/cpp/utility/optional#Defect_reports
13 See also	http://en.cppreference.com/cpp/utility/optional#See_also
Destructible	http://en.cppreference.com/cpp/named_req/Destructible
LegacyRandomAccessIterator	http://en.cppreference.com/cpp/named_req/RandomAccessIterator
ConstexprIterator	http://en.cppreference.com/cpp/named_req/ConstexprIterator
contiguous_iterator	http://en.cppreference.com/cpp/iterator/contiguous_iterator
LegacyRandomAccessIterator	http://en.cppreference.com/cpp/named_req/RandomAccessIterator
ConstexprIterator	http://en.cppreference.com/cpp/named_req/ConstexprIterator
contiguous_iterator	http://en.cppreference.com/cpp/iterator/contiguous_iterator
Container	http://en.cppreference.com/cpp/named_req/Container
(constructor)	http://en.cppreference.com/cpp/utility/optional/optional
[edit]	https://cppreference.com/index.php?title=Template:cpp/utility/optional/dsc_constructor&action=edit
(destructor)	http://en.cppreference.com/cpp/utility/optional/~optional
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operator=	http://en.cppreference.com/cpp/utility/optional/operator%3D
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end	http://en.cppreference.com/cpp/utility/optional/end
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operator->operator*	http://en.cppreference.com/cpp/utility/optional/operator*
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operator boolhas_value	http://en.cppreference.com/cpp/utility/optional/operator_bool
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value	http://en.cppreference.com/cpp/utility/optional/value
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value_or	http://en.cppreference.com/cpp/utility/optional/value_or
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and_then	http://en.cppreference.com/cpp/utility/optional/and_then
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transform	http://en.cppreference.com/cpp/utility/optional/transform
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or_else	http://en.cppreference.com/cpp/utility/optional/or_else
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swap	http://en.cppreference.com/cpp/utility/optional/swap
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reset	http://en.cppreference.com/cpp/utility/optional/reset
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emplace	http://en.cppreference.com/cpp/utility/optional/emplace
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make_optional	http://en.cppreference.com/cpp/utility/optional/make_optional
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std::swap(std::optional)	http://en.cppreference.com/cpp/utility/optional/swap2
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range formatting support	http://en.cppreference.com/cpp/utility/format/ranges_formatter
Deduction guides	http://en.cppreference.com/cpp/utility/optional/deduction_guides
Feature-test	http://en.cppreference.com/cpp/utility/feature_test
__cpp_lib_optional	http://en.cppreference.com/cpp/feature_test#cpp_lib_optional
201606L	http://en.cppreference.com/cpp/compiler_support/17#cpp_lib_optional_201606L
202106L	http://en.cppreference.com/cpp/compiler_support/23#cpp_lib_optional_202106L
202110L	http://en.cppreference.com/cpp/compiler_support/23#cpp_lib_optional_202110L
Monadic operations	http://en.cppreference.com/cpp/utility/optional#Monadic_operations
__cpp_lib_optional_range_support	http://en.cppreference.com/cpp/feature_test#cpp_lib_optional_range_support
202406L	http://en.cppreference.com/cpp/compiler_support/26#cpp_lib_optional_range_support_202406L
LWG 4141	https://cplusplus.github.io/LWG/issue4141
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