pub fn read_lines<P>(filename: P) -> io::Result<io::Lines<io::BufReader<File>>>
where P: AsRef<Path>, {
    let file = File::open(filename)?;
    Ok(io::BufReader::new(file).lines())
}
// The output is wrapped in a Result to allow matching on errors
// Returns an Iterator to the Reader of the lines of the file.
// https://doc.rust-lang.org/stable/rust-by-example/std_misc/file/read_lines.html
The output is wrapped in a Result to allow matching on errors
Returns an Iterator to the Reader of the lines of the file.
The output is wrapped in a Result to allow matching on errors Returns an Iterator to the Reader of the lines of the file .
pub fn read_lines<P>(filename: P) -> io::Result<io::Lines<io::BufReader<File>>>
where P: AsRef<Path>, {
    let file = File::open(filename)?;
    Ok(io::BufReader::new(file).lines())
}
pub fn read_lines < P > ( filename : P ) -> io :: Result < io :: Lines < io :: BufReader < File > > > where P : AsRef < Path > , { let file = File :: open ( filename ) ? ; Ok ( io :: BufReader :: new ( file ) . lines ( ) ) }
The output is wrapped in a Result to allow matching on errors
Returns an Iterator to the Reader of the lines of the file.
The output is wrapped in a Result to allow matching on errors Returns an Iterator to the Reader of the lines of the file .
filename
P
filename
P