std::ranges::stride_view<V>::stride_view
来自cppreference.com
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constexpr explicit stride_view( V base, ranges::range_difference_t<V> stride ); |
(C++23 起) | |
构造 stride_view，初始化底层数据成员：
如果 stride < 1 则行为未定义。
参数
| base | - | 源视图 |
| stride | - | 步长值 |
示例
运行此代码
#include <algorithm>
#include <iostream>
#include <iterator>
#include <ranges>
#include <string_view>
void print(std::string_view rem, auto v, std::string_view term = "\n")
{
std::cout << rem << ": ";
std::ranges::copy(v, std::ostream_iterator<int>(std::cout, " "));
std::cout << term;
};
int main()
{
auto source = std::views::iota(1, 10);
print("source", source);
for (int stride_value : std::views::iota(1, 6))
{
auto strided_view = std::views::stride(source, stride_value);
print("stride", std::views::single(stride_value), "-> ");
print("result", strided_view);
}
}
输出：
source: 1 2 3 4 5 6 7 8 9
stride: 1 -> result: 1 2 3 4 5 6 7 8 9
stride: 2 -> result: 1 3 5 7 9
stride: 3 -> result: 1 4 7
stride: 4 -> result: 1 5 9
stride: 5 -> result: 1 6