Module async_std::path

Expand description

Cross-platform path manipulation.

This module is an async version of std::path.

This module provides two types, PathBuf and Path (akin to String and str), for working with paths abstractly. These types are thin wrappers around OsString and OsStr respectively, meaning that they work directly on strings according to the local platform’s path syntax.

Paths can be parsed into Components by iterating over the structure returned by the components method on Path. Components roughly correspond to the substrings between path separators (/ or \). You can reconstruct an equivalent path from components with the push method on PathBuf; note that the paths may differ syntactically by the normalization described in the documentation for the components method.

Simple usage

Path manipulation includes both parsing components from slices and building new owned paths.

To parse a path, you can create a Path slice from a str slice and start asking questions:

use async_std::path::Path;
use std::ffi::OsStr;

let path = Path::new("/tmp/foo/bar.txt");

let parent = path.parent();
assert_eq!(parent, Some(Path::new("/tmp/foo")));

let file_stem = path.file_stem();
assert_eq!(file_stem, Some(OsStr::new("bar")));

let extension = path.extension();
assert_eq!(extension, Some(OsStr::new("txt")));

To build or modify paths, use PathBuf:

use async_std::path::PathBuf;

// This way works...
let mut path = PathBuf::from("c:\\");

path.push("windows");
path.push("system32");

path.set_extension("dll");

// ... but push is best used if you don't know everything up
// front. If you do, this way is better:
let path: PathBuf = ["c:\\", "windows", "system32.dll"].iter().collect();