25 Ranges library [ranges]

25.6 Range factories [range.factories]

25.6.5 Repeat view [range.repeat]

25.6.5.1 Overview [range.repeat.overview]

repeat_view generates a sequence of elements by repeatedly producing the same value.
The name views​::​repeat denotes a customization point object ([customization.point.object]).
Given subexpressions E and F, the expressions views​::​repeat(E) and views​::​repeat(E, F) are expression-equivalent to repeat_view<decay_t<decltype((E))>>(E) and repeat_view(E, F), respectively.
[Example 1: for (int i : views::repeat(17, 4)) cout << i << ' '; // prints 17 17 17 17 — end example]