std::seed_seq::seed_seq
seed_seq();
| (1) | (since C++11) |
seed_seq( const seed_seq& ) = delete;
| (2) | (since C++11) |
template< class InputIt >
seed_seq( InputIt begin, InputIt end );
| (3) | (since C++11) |
template< class T >
seed_seq( std::initializer_list<T> il );
| (4) | (since C++11) |
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)
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 iniial seed sequence |
Type requirements |
-InputIt must meet the requirements of InputIterator . |
Exceptions
1) Does not throw
Example
#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
}