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https://github.com/rust-lang/rust.git
synced 2026-06-03 01:16:14 +03:00
Alex Crichton
da0703973a
This commit moves Mutable, Map, MutableMap, Set, and MutableSet from `core::collections` to the `collections` crate at the top-level. Additionally, this removes the `deque` module and moves the `Deque` trait to only being available at the top-level of the collections crate. All functionality continues to be reexported through `std::collections`. [breaking-change]
25 lines
887 B
Rust
25 lines
887 B
Rust
// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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//! Traits for generic collections
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/// A trait to represent the abstract idea of a container. The only concrete
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/// knowledge known is the number of elements contained within.
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pub trait Collection {
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/// Return the number of elements in the container
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fn len(&self) -> uint;
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/// Return true if the container contains no elements
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#[inline]
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fn is_empty(&self) -> bool {
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self.len() == 0
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}
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}
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