| //! io-lifetimes provides safe, portable, and convenient conversions from types |
| //! implementing `IntoFilelike` and `FromSocketlike` to types implementing |
| //! `FromFilelike` and `IntoSocketlike`, respectively. |
| |
| #![cfg_attr(io_lifetimes_use_std, feature(io_safety))] |
| |
| use io_lifetimes::FromFilelike; |
| use std::fs::File; |
| use std::io::{self, Read}; |
| use std::process::{Command, Stdio}; |
| |
| fn main() -> io::Result<()> { |
| let mut child = Command::new("cargo") |
| .arg("--help") |
| .stdout(Stdio::piped()) |
| .spawn() |
| .expect("failed to execute child"); |
| |
| // Convert from `ChildStderr` into `File` without any platform-specific |
| // code or `unsafe`! |
| let mut file = File::from_into_filelike(child.stdout.take().unwrap()); |
| |
| // Well, this example is not actually that cool, because `File` doesn't let |
| // you do anything that you couldn't already do with `ChildStderr` etc., but |
| // it's useful outside of standard library types. |
| let mut buffer = String::new(); |
| file.read_to_string(&mut buffer)?; |
| |
| Ok(()) |
| } |
