Type Alias FileRenameHook 

pub type FileRenameHook = fn(from: &[u8], to: &[u8]) -> Result<()>;

Function-pointer signature for renaming a file, installed on GlobalState::file_rename_hook by the embedder.

std::fs is banned outside lua-cli, so lua-stdlib’s os.rename reaches the filesystem via this hook. Returns Ok(()) on success.

The error type is std::io::Error, for the same reason as FileRemoveHook (#301).