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use crate::{
	Back, BackMut, Capacity, Clear, Collection, CollectionMut, CollectionRef, Front, FrontMut, Len,
	PopBack, PushBack, Reserve, SimpleCollectionMut, SimpleCollectionRef, WithCapacity,
};
use std::collections::VecDeque;

impl<T> Collection for VecDeque<T> {
	type Item = T;
}

impl<T> CollectionRef for VecDeque<T> {
	type ItemRef<'a> = &'a T where Self: 'a;

	crate::covariant_item_ref!();
}

impl<T> CollectionMut for VecDeque<T> {
	type ItemMut<'a> = &'a mut T where Self: 'a;

	crate::covariant_item_mut!();
}

impl<T> SimpleCollectionRef for VecDeque<T> {
	fn into_ref<'a>(r: &'a T) -> &'a T
	where
		Self: 'a,
	{
		r
	}
}

impl<T> SimpleCollectionMut for VecDeque<T> {
	fn into_mut<'a>(r: &'a mut T) -> &'a mut T
	where
		Self: 'a,
	{
		r
	}
}

impl<T> WithCapacity for VecDeque<T> {
	#[inline(always)]
	fn with_capacity(capacity: usize) -> Self {
		VecDeque::with_capacity(capacity)
	}
}

impl<T> Len for VecDeque<T> {
	#[inline(always)]
	fn len(&self) -> usize {
		self.len()
	}

	#[inline(always)]
	fn is_empty(&self) -> bool {
		self.is_empty()
	}
}

impl<T> Capacity for VecDeque<T> {
	#[inline(always)]
	fn capacity(&self) -> usize {
		self.capacity()
	}
}

impl<T> Reserve for VecDeque<T> {
	#[inline(always)]
	fn reserve(&mut self, additional: usize) {
		self.reserve(additional)
	}
}

impl<T> Front for VecDeque<T> {
	#[inline(always)]
	fn front(&self) -> Option<&T> {
		self.front()
	}
}

impl<T> FrontMut for VecDeque<T> {
	#[inline(always)]
	fn front_mut(&mut self) -> Option<&mut T> {
		self.front_mut()
	}
}

impl<T> Back for VecDeque<T> {
	#[inline(always)]
	fn back(&self) -> Option<&T> {
		self.back()
	}
}

impl<T> BackMut for VecDeque<T> {
	#[inline(always)]
	fn back_mut(&mut self) -> Option<&mut T> {
		self.back_mut()
	}
}

impl<T> PushBack for VecDeque<T> {
	type Output = ();

	#[inline(always)]
	fn push_back(&mut self, t: T) {
		self.push_back(t)
	}
}

impl<T> PopBack for VecDeque<T> {
	#[inline(always)]
	fn pop_back(&mut self) -> Option<T> {
		self.pop_back()
	}
}

impl<T> Clear for VecDeque<T> {
	#[inline(always)]
	fn clear(&mut self) {
		self.clear()
	}
}