我诧，这个FS接口怎么这么不好用，居然还进了C++17。可以用auto lambda把不同类型的参数隔离出来复用其他相同代码吧。

#include <filesystem>
#include <fstream>
#include <iostream>
#include <random>
#include <variant>
namespace fs = std::filesystem;

int main() {
    std::mt19937 rng(std::random_device{}());
    bool recur = (std::uniform_int_distribution<>{}(rng)) & 1;

    fs::current_path(fs::temp_directory_path());
    fs::create_directories("sandbox/a/b");
    fs::create_symlink("a", "sandbox/syma");
    std::ofstream("sandbox/file1.txt");
    std::ofstream("sandbox/file2.txt");

    auto iter = [](auto dir) {
        for (auto &p : dir) std::cout << p.path() << std::endl;
    };
    
    // Calls lambda directly if it is simple.
    if (recur) iter(fs::recursive_directory_iterator("sandbox"));
    else iter(fs::directory_iterator("sandbox"));

    // Variants visitor to handle more types.
    std::variant<fs::recursive_directory_iterator, fs::directory_iterator> dir;
    if (recur) dir = fs::recursive_directory_iterator("sandbox");
    else dir = fs::directory_iterator("sandbox");
    std::visit(iter, dir);

    fs::remove_all("sandbox");
    return 0;
}

【 在 miui 的大作中提到: 】
: 比如我有一个函数,如果bRecursive为true,则
: namespace fs = std::filesystem;
: foo(const std::string& strPath, const bRecursive)
: ...................
--
修改:ble FROM 104.134.27.*
FROM 104.134.27.*