Parent dir path in Rust 1.55

To get the parent directory path in Rust 1.55, you can use the parent() method provided by the Path struct, which returns an Option<&Path> referencing the parent directory of the Path.

Here's an example to get the parent directory path of a file:

use std::path::Path;
fn get_parent_dir_path(file_path: &Path) -> Option<&Path> {

  file_path.parent()

}
fn main() {

  let file_path = Path::new("/home/user/documents/sample.txt");
if let Some(parent_dir) = get_parent_dir_path(&file_path) {

    println!("Parent directory path: {}", parent_dir.display());

  } else {

    println!("No parent directory found.");

  }

}

Output:

Parent directory path: /home/user/documents

You can also use the parent() method multiple times to get the parent directory at a higher level. For example, calling parent().parent() will return the grandparent directory path.