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std::ranges::iota_view<W, Bound>:: begin

From cppreference.net
Ranges library
Range adaptors
constexpr /*iterator*/ begin ( ) const ;
(C++20 起)

获取指向起始值的 迭代器

返回值

iterator  { value_  }

示例

#include <iostream>
#include <ranges>
int main()
{
    auto iota{std::views::iota(2, 6)};
    auto iter{iota.begin()};
    while (iter != iota.end())
        std::cout << *iter++ << ' ';
    std::cout << '\n';
}

输出:

2 3 4 5