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    // Copyright 2013-2014 The Rust Project Developers. See the COPYRIGHT
    // file at the top-level directory of this distribution and at
    // http://rust-lang.org/COPYRIGHT.
    //
    // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
    // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
    // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
    // option. This file may not be copied, modified, or distributed
    // except according to those terms.

    //! Collection types.
    //!
    //! See [std::collections](../std/collections/index.html) for a detailed discussion of
    //! collections in Rust.

    #![crate_name = "collections"]
    #![crate_type = "rlib"]
    #![unstable(feature = "collections",
                reason = "library is unlikely to be stabilized with the current \
                          layout and name, use std::collections instead",
                issue = "27783")]
    #![doc(html_logo_url = "https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
           html_favicon_url = "https://doc.rust-lang.org/favicon.ico",
           html_root_url = "https://doc.rust-lang.org/nightly/",
           html_playground_url = "https://play.rust-lang.org/",
           issue_tracker_base_url = "https://github.com/rust-lang/rust/issues/",
           test(no_crate_inject, attr(allow(unused_variables), deny(warnings))))]

    #![cfg_attr(test, allow(deprecated))] // rand
    #![cfg_attr(not(test), feature(copy_from_slice))] // impl [T]
    #![cfg_attr(not(stage0), deny(warnings))]

    #![feature(alloc)]
    #![feature(allow_internal_unstable)]
    #![feature(box_patterns)]
    #![feature(box_syntax)]
    #![feature(core_intrinsics)]
    #![feature(decode_utf16)]
    #![feature(dropck_parametricity)]
    #![feature(fmt_internals)]
    #![feature(heap_api)]
    #![feature(inclusive_range)]
    #![feature(iter_arith)]
    #![feature(lang_items)]
    #![feature(nonzero)]
    #![feature(pattern)]
    #![feature(placement_in)]
    #![feature(placement_new_protocol)]
    #![feature(shared)]
    #![feature(slice_patterns)]
    #![feature(staged_api)]
    #![feature(step_by)]
    #![feature(str_char)]
    #![feature(unboxed_closures)]
    #![feature(unicode)]
    #![feature(unique)]
    #![feature(unsafe_no_drop_flag)]
    #![cfg_attr(test, feature(rand, test))]

    #![no_std]

    extern crate rustc_unicode;
    extern crate alloc;

    #[cfg(test)]
    #[macro_use]
    extern crate std;
    #[cfg(test)]
    extern crate test;

    #[doc(no_inline)]
    pub use binary_heap::BinaryHeap;
    #[doc(no_inline)]
    pub use btree_map::BTreeMap;
    #[doc(no_inline)]
    pub use btree_set::BTreeSet;
    #[doc(no_inline)]
    pub use linked_list::LinkedList;
    #[doc(no_inline)]
    pub use enum_set::EnumSet;
    #[doc(no_inline)]
    pub use vec_deque::VecDeque;
    #[doc(no_inline)]
    pub use string::String;
    #[doc(no_inline)]
    pub use vec::Vec;

    // Needed for the vec! macro
    pub use alloc::boxed;

    #[macro_use]
    mod macros;

    pub mod binary_heap;
    mod btree;
    pub mod borrow;
    pub mod enum_set;
    pub mod fmt;
    pub mod linked_list;
    pub mod range;
    pub mod slice;
    pub mod str;
    pub mod string;
    pub mod vec;
    pub mod vec_deque;

    #[stable(feature = "rust1", since = "1.0.0")]
    pub mod btree_map {
        #[stable(feature = "rust1", since = "1.0.0")]
        pub use btree::map::*;
    }

    #[stable(feature = "rust1", since = "1.0.0")]
    pub mod btree_set {
        #[stable(feature = "rust1", since = "1.0.0")]
        pub use btree::set::*;
    }

    #[cfg(not(test))]
    mod std {
        pub use core::ops;      // RangeFull
    }

    /// An endpoint of a range of keys.
    #[unstable(feature = "collections_bound", issue = "27787")]
    #[derive(Clone, Copy, Debug, Hash, PartialEq, Eq)]
    pub enum Bound<T> {
        /// An inclusive bound.
        Included(T),
        /// An exclusive bound.
        Excluded(T),
        /// An infinite endpoint. Indicates that there is no bound in this direction.
        Unbounded,
    }

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