我想创建一个视图，它包含字符串的两个部分。我添加了一些代码示例来说明我想实现什么。我该怎么做呢？

#include <iostream>
#include <string>
#include <ranges>
#include <vector>
#include <cassert>

int main() {
    std::vector<std::string> data{
        "abcdef",
        "12345678910",
        "ab",
        "qwerty",
        "xyzxyz",
        "987654321"
    };

    // Ok:
    auto chunk3 = std::views::chunk(data, 3);
    assert(std::ranges::size(chunk3) == 2);
    for (auto chunk : chunk3) {
        assert(std::ranges::size(chunk) == 3);
    }

    // Problem:
    auto view = /*...*/
    assert(std::ranges::size(view) == 6);
    for (auto halves : view) {
        assert(std::ranges::size(halves) == 2);
    }
}

chunk3看起来像什么：

/*
chunk3 {
    {"abcdef", "12345678910", "ab"}
    {"qwerty", "xyzxyz", "987654321"}
}
*/

视图的外观：

/*
view {
    {{"abc"}, {"def"}}
    {{"123456"}, {"78910"}}
    // ...
}
*/