[rand.req.seedseq] (original) (raw)

A class Smeets the requirements of a seed sequence if the expressions shown in Table 126are valid and have the indicated semantics, and if S also meets all other requirements of [rand.req.seedseq].

In Table 126 and throughout this subclause:

T is the type named byS's associated result_type;
q is a value of type S andr is a value of type S or const S;
ib and ie are input iterators with an unsigned integer value_type of at least 32 bits;
rb and re are mutable random access iterators with an unsigned integer value_type of at least 32 bits;
ob is an output iterator; and
il is a value of type initializer_list<T>.

Table 126 — Seed sequence requirements [tab:rand.req.seedseq]

🔗Expression	Return type	Pre/post-condition	Complexity
🔗S::result_type	T	T is an unsigned integer type of at least 32 bits.
🔗S()	Creates a seed sequence with the same initial state as all other default-constructed seed sequences of type S.	constant
🔗S(ib,ie)	Creates a seed sequence having internal state that depends on some or all of the bits of the supplied sequence [ib,ie).
🔗S(il)	Same as S(il.begin(), il.end()).	same as S(il.begin(), il.end())
🔗q.generate(rb,re)	void	Does nothing if rb == re. Otherwise, fills the supplied sequence [rb,re) with 32-bit quantities that depend on the sequence supplied to the constructor and possibly also depend on the history of generate's previous invocations.
🔗r.size()	size_t	The number of 32-bit units that would be copied by a call to r.param.	constant
🔗r.param(ob)	void	Copies to the given destination a sequence of 32-bit units that can be provided to the constructor of a second object of type S, and that would reproduce in that second object a state indistinguishable from the state of the first object.