C++ named requirements: SeedSequence (since 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.

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())

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