# Function ethcore_util::standard::fs::rename 1.0.0 [−] [src]

    pub fn rename<P, Q>(from: P, to: Q) -> Result<(), Error> where P: AsRef<Path>, Q: AsRef<Path>

Rename a file or directory to a new name, replacing the original file if `to` already exists.

This will not work if the new name is on a different mount point.

# Platform-specific behavior

This function currently corresponds to the `rename` function on Unix and the `MoveFileEx` function with the `MOVEFILE_REPLACE_EXISTING` flag on Windows.

Because of this, the behavior when both `from` and `to` exist differs. On Unix, if `from` is a directory, `to` must also be an (empty) directory. If `from` is not a directory, `to` must also be not a directory. In contrast, on Windows, `from` can be anything, but `to` must not be a directory.

Note that, this may change in the future.

# Errors

This function will return an error in the following situations, but is not limited to just these cases:

- `from` does not exist.
- The user lacks permissions to view contents.
- `from` and `to` are on separate filesystems.

# Examples

    use std::fs;

    try!(fs::rename("a.txt", "b.txt")); // Rename a.txt to b.txt

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