std::seed_seq::seed_seq (3) Linux Manual Page

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
}