Function std::fs::read_to_string 1.26.0[−][src]
pub fn read_to_string<P: AsRef<Path>>(path: P) -> Result<String>
Expand description
Read the entire contents of a file into a string.
This is a convenience function for using File::open
and read_to_string
with fewer imports and without an intermediate variable. It pre-allocates a
buffer based on the file size when available, so it is generally faster than
reading into a string created with String::new()
.
Errors
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.
Examples
use std::fs;
use std::net::SocketAddr;
use std::error::Error;
fn main() -> Result<(), Box<dyn Error>> {
let foo: SocketAddr = fs::read_to_string("address.txt")?.parse()?;
Ok(())
}
Run