Playing around with file system navigation in Rust.

walky-talky.rs

// Tested on Rust 0.8 on OS X.

fn main() {
    
    use std::*;

    // This include is for the POSIX dirent style methods like "is_dir()".
    use std::rt::io::file::*;

    // Returns a "Path" struct (kind of like the var name, OMG!)
    let path  = os::getcwd();
    
    /* -----------------------------------------------------
     * The following two methods are functionally identical.
     * -----------------------------------------------------
     * 
     * let files = os::list_dir_path(&path);
     * 
     * for file in files.iter() {
     *     if file.is_dir() {
     *         // Returns a "PosixPath" struct.
     *         println!("{:?}", file.to_str());
     *     }
     * }
     * 
     * -----------------------------------------------------
     * 
     * let files = os::list_dir(&path);
     *
     * for file in files.iter() {
     *     if Path(*file).is_dir() {
     *         // Returns a borrowed "&" string pointer.
     *         println!("{:?}", *file);
     *     }
     * }
     *
     * -----------------------------------------------------
     */

    // -------------------------------------------------------------------
    // A pointer "*" dereferences memory which is:
    // -------------------------------------------------------------------
    // "~" | Owned    - Allocated on the heap memory.
    // "@" | Managed  - Memory is managed by the Rust garbage collector.
    // "&" | Borrowed - A reference pointer to memory allocated elsewhere.
    // -------------------------------------------------------------------
    
    let files = os::list_dir(&path);
    
    for file in files.iter() {
        if Path(*file).is_dir() {
            println!("{:?}", file);
        }
    }

}