Struct ScanLines

pub struct ScanLines<R: Read> { /* private fields */ }

used to generate Scanner structs for each line

Implementations

impl<'a, R: Read> ScanLines<R>

pub fn new(f: R) -> ScanLines<R>

create a Scanner ‘iterator’ over all lines from a readable. This cannot be a proper Iterator because the lifetime constraint on Scanner cannot be satisfied. You need to use the explicit form:

let mut iter = ScanLines::new(File::open("lines.txt")?);
while let Some(s) = iter.next() {
    let mut s = s?;
    // first token of each line
    println!("{:?}",s.get());
}

pub fn next(&'a mut self) -> Option<Result<Scanner<'a>>>

call this to return a Scanner for the next line in the source.