read_to_string in std::fs - Rust (original) (raw)

Expand description

Read the entire contents of a file into a string.

This is a convenience function for using File::open and read_to_stringwith fewer imports and without an intermediate variable.

This function will return an error if path does not already exist. Other errors may also be returned according to OpenOptions::open.

It will also return an error if it encounters while reading an error of a kind other than io::ErrorKind::Interrupted, or if the contents of the file are not valid UTF-8.

use std::fs;
use std:🥅:SocketAddr;
use std::error::Error;

fn main() -> Result<(), Box<dyn Error>> {
    let foo: SocketAddr = fs::read_to_string("address.txt")?.parse()?;
    Ok(())
}

Run