| // ScanLines is a struct that is used to 'iterate' over a Scanner |
| // for each line in a readable source. It cannot (currently) be |
| // an actual iterator because of lifetime constraints, because |
| // it returns a Scanner that borrows a string from the struct. This |
| // however makes it more efficient. |
| // |
| // This example prints out the first token of each line in this file |
| extern crate scanlex; |
| use scanlex::ScanLines; |
| use std::fs::File; |
| |
| fn main() { |
| let f = File::open("scanline.rs").expect("cannot open scanline.rs"); |
| let mut iter = ScanLines::new(&f); |
| while let Some(s) = iter.next() { |
| let mut s = s.expect("cannot read line"); |
| println!("{:?}",s.get()); |
| } |
| } |
