extern crate serde_derive;

extern crate serde;
extern crate serde_json;

use serde::{Serialize, Deserialize};

#[derive(Serialize, Deserialize)]
pub struct A<'a> {
    pub v: &'a str
}

impl<'a> std::fmt::Display for A<'a> {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        write!(f, "A{{v: {}}}", self.v)
    }
}

fn main() {
    // ex 1 works fine
    let a1 = A{v: "hello"};
    let v1 = serde_json::to_string(&a1).unwrap();
    let deser_value1 = serde_json::from_str::<A>(&v1).unwrap();
    println!("deser1: {}", deser_value1);

    // ex 2
    let v2 = r#"{"v":"hel\"lo"}"#;
    let deser_value2 = serde_json::from_str::<A>(&v2).unwrap();
    println!("deser2: {}", deser_value2);

    // ex 3 runtime error
    let a3 = A{v: "hel\"lo"};
    let v3 = serde_json::to_string(&a3).unwrap();
    let deser_value3 = serde_json::from_str::<A>(&v3).unwrap();
    println!("deser3: {}", deser_value3);
}