29 Numerics library [numerics]

29.5 Random number generation [rand]

29.5.3 Requirements [rand.req]

29.5.3.2 Seed sequence requirements [rand.req.seedseq]

Table 121 — Seed sequence requirements [tab:rand.req.seedseq]
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Expression
Return type
Pre/post-condition
Complexity
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S​::​result_type
T
T is an unsigned integer type of at least 32 bits.
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S()
Creates a seed sequence with the same initial state as all other default-constructed seed sequences of type S.
constant
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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).
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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.
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r.size()
size_t
The number of 32-bit units that would be copied by a call to r.param.
constant
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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.