/*use source_stream_0::{CollectedSubstring, Pos, SourceStream};
use crate::iterators::StrSourceIterator;
use crate::pos::{IndexPosCounter, NewLinePosCounter, PosLineCol};
use crate::{_CollectScopeContext, SourceIterator};

#[test]
fn sandbox() {
    let mut z = StrSourceIterator::start("12\n34");
    println!("{}", z.pos());
    z.next();
    println!("{} ", z.pos());
    z.next();
    println!("{}", z.pos());
    z.next();
    println!("{} ", z.pos());
    z.next();
    println!("{} ", z.pos());
    z.next();
    println!("{} ", z.pos());
    z.next();
    println!("{} ", z.pos());
    z.next();
    println!("{} ", z.pos());
    z.next();
    println!("{} ", z.pos());
    z.next();
    println!("{} ", z.pos());
    z.next();


    return;
}
*/