Function tracing::stdlib::fs::read_to_string
1.26.0 · source · pub fn read_to_string<P>(path: P) -> Result<String, Error>
Expand description
Reads 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.
§Errors
This function will return an error if path
does not already exist.
Other errors may also be returned according to OpenOptions::open
.
If the contents of the file are not valid UTF-8, then an error will also be returned.
While reading from the file, this function handles io::ErrorKind::Interrupted
with automatic retries. See io::Read documentation for details.
§Examples
use std::fs;
use std::error::Error;
fn main() -> Result<(), Box<dyn Error>> {
let message: String = fs::read_to_string("message.txt")?;
println!("{}", message);
Ok(())
}