use Result;
use std::convert::TryInto;
use heap::Heap;

#[derive(Debug, Clone, PartialEq)]
pub enum Value {
    Int(i32),
    HeapRef(Heap),
}

impl TryInto<i32> for Value {
    type Error = &'static str;

    fn try_into(self) -> Result<i32> {
        match self {
            Value::Int(a) => Ok(a),
            Value::HeapRef(_) => Err("Cannot use HeapRef as i32"),
        }
    }
}

impl TryInto<i32> for &Value {
    type Error = &'static str;

    fn try_into(self) -> Result<i32> {
        match *self {
            Value::Int(a) => Ok(a),
            Value::HeapRef(_) => Err("Cannot use HeapRef as i32"),
        }
    }
}