如何在路径规范中使用两个点

Question

在这个例子中

#include <iostream>
#include <experimental/filesystem>
namespace fs = std::experimental::filesystem;
int main()
{
    fs::path p = fs::path("..") / ".." / "AppData";//What is it?
    std::cout << "Current path is " << fs::current_path() << '\n'
              << "Canonical path for " << p << " is " << fs::canonical(p) << '\n';
}

什么是".."，它是如何运作的？

Answer 1

..是父目录，如果你在/ home / user / kat并转到..你将在/ home / user。

例如这样的代码：

fs::path parentPath = fs::current_path() / "..";
std::cout << parentPath << " → " << fs::canonical(parentPath) << std::endl;

将产生此输出（在我的电脑上）：

"/home/kamil/Pulpit/build/.." → "/home/kamil/Pulpit"