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use std::ops::Deref;
use std::rc::Rc;
use std::sync::Arc;
use measure::Measured;
use node::NodeInner;
use tree::FingerTreeInner;
pub trait Ref: Clone + Deref
where
Self::Target: Sized,
{
fn new(value: Self::Target) -> Self;
}
impl<T> Ref for Rc<T> {
fn new(value: Self::Target) -> Self {
Rc::new(value)
}
}
impl<T> Ref for Arc<T> {
fn new(value: Self::Target) -> Self {
Arc::new(value)
}
}
pub trait Refs<V>: Sized
where
V: Measured,
{
type Node: Ref<Target = NodeInner<Self, V>>;
type Tree: Ref<Target = FingerTreeInner<Self, V>>;
}
#[macro_export]
macro_rules! fingertree_define_refs {
(pub $refs:ident, $ref:ident) => {
pub enum $refs {}
fingertree_define_refs!(@refs_impl $refs, $ref);
};
($refs:ident, $ref:ident) => {
enum $refs {}
fingertree_define_refs!(@refs_impl $refs, $ref);
};
(@refs_impl $refs:ident, $ref:ident) => {
impl<V> $crate::Refs<V> for $refs
where
V: $crate::measure::Measured,
{
type Node = $ref<$crate::NodeInner<Self, V>>;
type Tree = $ref<$crate::FingerTreeInner<Self, V>>;
}
};
}
fingertree_define_refs!(pub RcRefs, Rc);
fingertree_define_refs!(pub ArcRefs, Arc);