std::seed_seq::seed_seq (3) - Linux Manuals

std::seed_seq::seed_seq: std::seed_seq::seed_seq

NAME

std::seed_seq::seed_seq - std::seed_seq::seed_seq

Synopsis

seed_seq(); (1) (since C++11)
seed_seq( const seed_seq& ) = delete; (2) (since C++11)
template< class InputIt > (3) (since C++11)
seed_seq( InputIt begin, InputIt end );
template< class T > (4) (since C++11)
seed_seq( std::initializer_list<T> il );

1) The default constructor creates a std::seed_seq object with an initial seed sequence of length zero.
2) The copy constructor is deleted: std::seed_seq is not copyable.
3) Constructs a std::seed_seq with the initial seed sequence obtained by iterating over the range [begin, end) and copying the values obtained by dereferencing the iterator, modulo 232
(that is, the lower 32 bits are copied)
4) Equivalent to seed_seq(il.begin(), il.end()). This constructor enables list-initialization.

Parameters

begin, end - the initial seed sequence represented as a pair of input iterators whose std::iterator_traits<>::value_type is an integer type
il - std::initializer_list of objects of integer type, providing the initial seed sequence

Type requirements

-
InputIt must meet the requirements of LegacyInputIterator.

Exceptions

1) Does not throw

Example

// Run this code

  #include <random>
  #include <sstream>
  #include <iterator>
  int main()
  {
      std::seed_seq s1; // default-constructible
      std::seed_seq s2{1, 2, 3}; // can use list-initialization
      std::seed_seq s3 = {-1, 0, 1}; // another form of list-initialization
      int a[10] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
      std::seed_seq s4(a, a + 10); // can use iterators
      std::istringstream buf("1 2 3 4 5");
      std::istream_iterator<int> beg(buf), end;
      std::seed_seq s5(beg, end); // even stream input iterators
  }