1//! io-lifetimes provides safe, convenient, and portable ways to temporarily
2//! view an I/O resource as a `File`, `Socket`, or other types.
3
4use io_lifetimes::AsFilelike;
5use std::fs::File;
6use std::io::{self, stdout};
7
8fn main() -> io::Result<()> {
9    let stdout = stdout();
10
11    // With `AsFilelike`, any type implementing `AsFd`/`AsHandle` can be viewed
12    // as any type supporting `FromFilelike`, so you can call `File` methods on
13    // `Stdout` or other things.
14    //
15    // Whether or not you can actually do this is up to the OS, of course. In
16    // this case, Unix can do this, but it appears Windows can't.
17    let metadata = stdout.as_filelike_view::<File>().metadata()?;
18
19    if metadata.is_file() {
20        println!("stdout is a file!");
21    } else {
22        println!("stdout is not a file!");
23    }
24
25    Ok(())
26}
27