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//! This module contains the representation holders, the underlay type of
//! [`Yaml`] type.
//!
//! [`Rc`] is the single thread reference counter,
//! and [`Arc`] is the multiple thread reference counter.
use crate::Yaml;
use alloc::{rc::Rc, sync::Arc};
use core::{fmt::Debug, hash::Hash, ops::Deref};
/// The representation symbol for [`Rc`].
pub struct RcRepr;
/// The representation symbol for [`Arc`].
pub struct ArcRepr;
/// The generic representation holder for [`Yaml`].
///
/// See the implementor list for the choose.
pub trait Repr: Sized {
/// Type of the representation, e.g., the reference counter type.
type Rc: Deref<Target = Yaml<Self>> + Hash + Eq + Clone + Debug;
/// The creation function of this type.
fn new_rc(yaml: Yaml<Self>) -> Self::Rc;
}
impl Repr for RcRepr {
type Rc = Rc<Yaml<Self>>;
fn new_rc(yaml: Yaml<Self>) -> Self::Rc {
Rc::new(yaml)
}
}
impl Repr for ArcRepr {
type Rc = Arc<Yaml<Self>>;
fn new_rc(yaml: Yaml<Self>) -> Self::Rc {
Arc::new(yaml)
}
}