C++ 实验性/文件系统 remove_all

Question

我想在 C++17 中删除包含子文件夹和文件的文件夹。我正在使用 experimental/filesystem

namespace filesys = std::experimental::filesystem;
...

uintmax_t n = filesys::remove_all("tmp");
cout << "Deleted " << n << " files or directories\n";

但是当我运行这段代码时，程序抛出异常

terminate called after throwing an instance of 'std::experimental::filesystem::v1::__cxx11::filesystem_error'

what(): filesystem error: cannot remove all: Directory not empty [tmp]

Aborted

使用编译器 g++ 5.4.0

文档说:

Deletes the contents of p (if it is a directory) and the contents of all its subdirectories, recursively, then deletes p itself as if by repeatedly applying the POSIX remove. Symlinks are not followed (symlink is removed, not its target)

我的代码有问题吗？

Answer 1

抛出此错误的情况可能是 gcc 5.4 实现中的一个问题: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71313

使用较新版本的 gcc 不会抛出此类错误。例如，对于 gcc 7.4.0 上的空 remove_all 调用不会抛出此错误。