C++ 概念： SeedSequence

 

C++

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算法库

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C++ 的概念

基础
DefaultConstructible CopyAssignable CopyConstructible	MoveAssignable （C++11） MoveConstructible （C++11） Destructible
库
EqualityComparable LessThanComparable Swappable （C++11） ValueSwappable （C++11）	NullablePointer （C++11） Hash （C++11） Allocator
容器
Container SequenceContainer ReversibleContainer	AssociativeContainer AllocatorAwareContainer UnorderedAssociativeContainer （C++11）
容器元素
CopyInsertable （C++11） MoveInsertable （C++11）	EmplaceConstructible （C++11）
迭代器
Iterator OutputIterator InputIterator	ForwardIterator BidirectionalIterator RandomAccessIterator
随机数
SeedSequence （C++11） RandomNumberEngine （C++11）	RandomNumberDistribution （C++11） UniformRandomNumberGenerator （C++11） RandomNumberEngineAdaptor （C++11）
并发
BasicLockable （C++11） Lockable （C++11） TimedLockable （C++11）	Mutex （C++11） TimedMutex （C++11）
其它
CharTraits pos_type off_type Clock （C++11）	UnaryTypeTrait （C++11） BinaryTypeTrait （C++11） TransformationTrait （C++11） TrivialClock （C++11）

 

一个seed sequence是一个对象，它产生的无符号整数的值i的范围内0 ≤ i < 232
消耗的范围内的整数数据的基础上.

Original:

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

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要求

• S被SeedSequence.

  Original:

  S is a SeedSequence.

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• q一个目的是S和r是一个潜在的常量对象S.

  Original:

  q is an object of S and r is a potentially constant object of S.

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• T is the result_type.
• ib，ie是至少32位无符号整数的值与InputIteratorvalue_types.

  Original:

  ib,ie are InputIterators with a value_type of unsigned integer values of at least 32 bits.

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• il is an std::initializer_list<T>.
• rb， re是修改RandomAccessIterators，至少32位的无符号整数的值与value_type.

  Original:

  rb,re are modifiable RandomAccessIterators with a value_type of unsigned integer values of at least 32 bits.

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• ob is an OutputIterator.

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 default values as other objects of type S	constant
S(ib,ie)		Creates a seed sequence based on the 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 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())

另请参阅

• std::seed_seq