pathを便利に扱うためのmethodが生えている

use std::path::PathBuf;

fn main() {
    let mut path = PathBuf::from("/home/user");
    path.push("documents");
    path.push("file.txt");
    println!("{:?}", path); // "/home/user/documents/file.txt"
}

fn main() {
    let path = PathBuf::from("example.tar.gz");

    if let Some(ext) = path.extension() {
        println!("拡張子: {:?}", ext);
    }
}

fn main() {
    let path = PathBuf::from("/home/user/documents/file.txt");

    if let Some(parent) = path.parent() {
        println!("親ディレクトリ: {:?}", parent);
    }
}

fn main() {
    let path = PathBuf::from("file.txt");

    match path.canonicalize() {
        Ok(absolute_path) => println!("絶対パス: {:?}", absolute_path),
        Err(e) => eprintln!("エラー: {:?}", e),
    }
}