C++ concepts: SeedSequence

< cpp‎ | concept
Revision as of 14:52, 2 November 2012 by P12bot (Talk | contribs)


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.


  • S is a SeedSequence.
  • q is an object of S and r is a potentially constant object of S.
  • T is the result_type.
  • ib,ie are InputIterators with a value_type of unsigned integer values of at least 32 bits.
  • il is an std::initializer_list<T>.
  • rb,re are modifiable RandomAccessIterators with a value_type of unsigned integer values of at least 32 bits.
  • 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())

See also