Rust Essentials - Second Edition

Paths

File paths from the underlying file system are represented by the Path struct, which is created from a string slice containing the full path with Path::new. Suppose hello.txt is an existing file in the current directory; let's write some code to explore it:

// code from Chapter 11/code/paths.rs:use std::path::Path; 
 
fn main() { 
    let path = Path::new("hello.txt"); 
 let display = path.display(); 
     
    // test whether path exists: 
    if path.exists() { 
        println!("{} exists", display); 
    } 
    else { 
        panic!("This path or file does not exist!"); 
    } 
 
    let file = path.file_name().unwrap();    let extension = path.extension().unwrap();    let parent_dir = path.parent().unwrap(); println!("This is file {:?} with extension {:?} in folder {:?}", file, extension, parent_dir); ...