use serde_json::json;
use super::IExpression;
pub struct Undefined {}
impl IExpression for Undefined {
fn to_unambigious_string(&self) -> String {
String::from("Undefined")
}
fn id(&self) -> String {
String::from("Undefined")
}
fn to_json(&self) -> serde_json::Value {
json!("Undefined")
}
}
pub const UNDEFINED: Undefined = Undefined {};