//! Collection types.

#![stable(feature = "rust1", since = "1.0.0")]

pub mod binary_heap;
mod btree;
pub mod linked_list;
pub mod vec_deque;

#[stable(feature = "rust1", since = "1.0.0")]
pub mod btree_map {
    //! A map based on a B-Tree.
    #[stable(feature = "rust1", since = "1.0.0")]
    pub use super::btree::map::*;
}

#[stable(feature = "rust1", since = "1.0.0")]
pub mod btree_set {
    //! A set based on a B-Tree.
    #[stable(feature = "rust1", since = "1.0.0")]
    pub use super::btree::set::*;
}

#[stable(feature = "rust1", since = "1.0.0")]
#[doc(no_inline)]
pub use binary_heap::BinaryHeap;

#[stable(feature = "rust1", since = "1.0.0")]
#[doc(no_inline)]
pub use btree_map::BTreeMap;

#[stable(feature = "rust1", since = "1.0.0")]
#[doc(no_inline)]
pub use btree_set::BTreeSet;

#[stable(feature = "rust1", since = "1.0.0")]
#[doc(no_inline)]
pub use linked_list::LinkedList;

#[stable(feature = "rust1", since = "1.0.0")]
#[doc(no_inline)]
pub use vec_deque::VecDeque;

use crate::alloc::{AllocErr, LayoutErr};

/// Augments `AllocErr` with a CapacityOverflow variant.
#[derive(Clone, PartialEq, Eq, Debug)]
#[unstable(feature = "try_reserve", reason = "new API", issue="48043")]
pub enum CollectionAllocErr {
    /// Error due to the computed capacity exceeding the collection's maximum
    /// (usually `isize::MAX` bytes).
    CapacityOverflow,
    /// Error due to the allocator (see the `AllocErr` type's docs).
    AllocErr,
}

#[unstable(feature = "try_reserve", reason = "new API", issue="48043")]
impl From<AllocErr> for CollectionAllocErr {
    #[inline]
    fn from(AllocErr: AllocErr) -> Self {
        CollectionAllocErr::AllocErr
    }
}

#[unstable(feature = "try_reserve", reason = "new API", issue="48043")]
impl From<LayoutErr> for CollectionAllocErr {
    #[inline]
    fn from(_: LayoutErr) -> Self {
        CollectionAllocErr::CapacityOverflow
    }
}

/// An intermediate trait for specialization of `Extend`.
#[doc(hidden)]
trait SpecExtend<I: IntoIterator> {
    /// Extends `self` with the contents of the given iterator.
    fn spec_extend(&mut self, iter: I);
}