C++ named requirements: SeedSequence (since C++11)

 

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C++ named requirements

Basic DefaultConstructible MoveConstructible (C++11) CopyConstructible CopyAssignable MoveAssignable (C++11) Destructible Type properties ScalarType PODType TriviallyCopyable (C++11) TrivialType (C++11) StandardLayoutType (C++11)   ImplicitLifetimeType Library-wide BooleanTestable EqualityComparable LessThanComparable Swappable ValueSwappable (C++11) NullablePointer (C++11) Hash (C++11) Allocator FunctionObject Callable Predicate BinaryPredicate Compare

Container Container ReversibleContainer AllocatorAwareContainer SequenceContainer ContiguousContainer (C++17) AssociativeContainer UnorderedAssociativeContainer (C++11)   Container element DefaultInsertable (C++11) CopyInsertable (C++11) MoveInsertable (C++11) EmplaceConstructible (C++11) Erasable (C++11) Iterator LegacyIterator LegacyInputIterator LegacyOutputIterator LegacyForwardIterator LegacyBidirectionalIterator LegacyRandomAccessIterator LegacyContiguousIterator (C++17) ConstexprIterator (C++20) Stream I/O FormattedInputFunction UnformattedInputFunction FormattedOutputFunction UnformattedOutputFunction Formatters BasicFormatter (C++20) Formatter (C++20)

Random Numbers SeedSequence (C++11) RandomNumberEngine (C++11) RandomNumberDistribution (C++11) UniformRandomBitGenerator (C++11) RandomNumberEngineAdaptor (C++11) Concurrency BasicLockable (C++11) Lockable (C++11) TimedLockable (C++11) SharedLockable (C++14) SharedTimedLockable (C++14) Mutex (C++11) TimedMutex (C++11) SharedMutex (C++17) SharedTimedMutex (C++14) Ranges RangeAdaptorObject (C++20) RangeAdaptorClosureObject (C++20) Multidimensional View LayoutMapping (C++23) LayoutMappingPolicy (C++23) AccessorPolicy (C++23) Other CharTraits RegexTraits (C++11)   BitmaskType LiteralType (C++11) NumericType UnaryTypeTrait (C++11) BinaryTypeTrait (C++11) TransformationTrait (C++11) Clock (C++11) TrivialClock (C++11)

 

A SeedSequence is an object that produces unsigned integer values i in the range 0 ≤ i < 232 based on a consumed range of integer data.

Requirements

• S is a SeedSequence type.
• q is an object of S and r is a potentially constant object of S.
• T is the result_type.
• ib, ie are LegacyInputIterators with a value_type of unsigned integer values of at least 32 bits.
• il is a std::initializer_list<T>.
• rb, re are mutable LegacyRandomAccessIterators with a value_type of unsigned integer values of at least 32 bits.
• ob is a LegacyOutputIterator.

Expression	Type	Notes	Complexity
S::result_type	T	Unsigned integer of at least 32 bits.	Compile-time
S()		Creates a seed sequence with the same initial state as other default-constructed seed sequences of type S.	Constant
S(ib, ie)		Creates a seed sequence with internal state depending on some or all supplied input bits by [ib, ie).	O(ie - ib)
S(il)		The same as S(il.begin(), il.end()).
q.generate(rb, re)	void	Fills [rb, re) with 32-bit quantities depending on the initial supplied values and potential previous calls to generate. If rb == re, it does nothing.	O(re - rb)
r.size()	size_t	The amount of 32-bit integers copied by param.	Constant
r.param(ob)	void	Copies 32-bit values to ob that would reproduce the current state of the object if passed to a constructor of S.	O(r.size())

See also

• std::seed_seq