extern crate serde; // 1.0.85
extern crate serde_json; // 1.0.37
extern crate serde_derive; // 1.0.85

use serde_derive::{Deserialize, Serialize};

macro_rules! show {
    ($e : expr) => {
        println!("{}: {:?}", stringify!($e), $e);
    }
}

#[derive(Debug, Deserialize, Serialize)]
pub struct Mystruct {
    pub foo : f64,
    pub bar : Vec<String>
}

fn skip6(x : &mut &[u8]) {
    *x = &(*x)[6..];
}


fn main() {
    let m = Mystruct {
        foo: -1.0,
        bar: vec!["hello".into(), "world".into()]
    };
    show!(m);
    show!(serde_json::to_string(&m).unwrap());
    let r = r#"{"foo":2.5,"bar":["abc","123"]}abcdef123456"#;
    show!(r.len());
    let mut deserializer = serde_json::Deserializer::from_str(r)
        .into_iter::<serde_json::Value>();
    show!(deserializer.byte_offset());
    show!(serde_json::from_value::<Mystruct>(deserializer.next().unwrap().unwrap()).unwrap());
    show!(deserializer.byte_offset());
    show!(&r[deserializer.byte_offset()..]);
    let mut x = &r.as_bytes()[deserializer.byte_offset()..];
    show!(x.len());
    skip6(&mut x);
    show!(x.len());
}