You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: cwd.rs
    path of file: ./repos/rustix/src/fs
    
    the code of the file until where you have to start completion: //! The `cwd` function, representing the current working directory.
//!
//! # Safety
/
    
pub const fn cwd() -> BorrowedFd<'static> {
    let at_fdcwd = c::AT_FDCWD as RawFd;

    // SAFETY: `AT_FDCWD` is a reserved value that is never dynamically
    // allocated, so it'll remain valid for the duration of `'static`.
    unsafe { BorrowedFd::<'static>::borrow_raw(at_fdcwd) }
}