125 lines
3.7 KiB
Rust
125 lines
3.7 KiB
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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//! Container traits for collections
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use std::container::Mutable;
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/// A double-ended sequence that allows querying, insertion and deletion at both ends.
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pub trait Deque<T> : Mutable {
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/// Provide a reference to the front element, or None if the sequence is empty
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fn front<'a>(&'a self) -> Option<&'a T>;
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/// Provide a mutable reference to the front element, or None if the sequence is empty
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fn front_mut<'a>(&'a mut self) -> Option<&'a mut T>;
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/// Provide a reference to the back element, or None if the sequence is empty
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fn back<'a>(&'a self) -> Option<&'a T>;
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/// Provide a mutable reference to the back element, or None if the sequence is empty
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fn back_mut<'a>(&'a mut self) -> Option<&'a mut T>;
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/// Insert an element first in the sequence
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fn push_front(&mut self, elt: T);
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/// Insert an element last in the sequence
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fn push_back(&mut self, elt: T);
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/// Remove the last element and return it, or None if the sequence is empty
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fn pop_back(&mut self) -> Option<T>;
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/// Remove the first element and return it, or None if the sequence is empty
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fn pop_front(&mut self) -> Option<T>;
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}
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#[cfg(test)]
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pub mod bench {
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extern crate test;
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use self::test::BenchHarness;
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use std::container::MutableMap;
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use rand;
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use rand::Rng;
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pub fn insert_rand_n<M:MutableMap<uint,uint>>(n: uint,
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map: &mut M,
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bh: &mut BenchHarness) {
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// setup
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let mut rng = rand::weak_rng();
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map.clear();
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for _ in range(0, n) {
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map.insert(rng.gen::<uint>() % n, 1);
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}
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// measure
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bh.iter(|| {
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let k = rng.gen::<uint>() % n;
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map.insert(k, 1);
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map.remove(&k);
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})
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}
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pub fn insert_seq_n<M:MutableMap<uint,uint>>(n: uint,
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map: &mut M,
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bh: &mut BenchHarness) {
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// setup
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map.clear();
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for i in range(0u, n) {
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map.insert(i*2, 1);
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}
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// measure
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let mut i = 1;
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bh.iter(|| {
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map.insert(i, 1);
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map.remove(&i);
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i = (i + 2) % n;
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})
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}
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pub fn find_rand_n<M:MutableMap<uint,uint>>(n: uint,
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map: &mut M,
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bh: &mut BenchHarness) {
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// setup
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let mut rng = rand::weak_rng();
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let mut keys = Vec::from_fn(n, |_| rng.gen::<uint>() % n);
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for k in keys.iter() {
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map.insert(*k, 1);
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}
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rng.shuffle(keys.as_mut_slice());
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// measure
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let mut i = 0;
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bh.iter(|| {
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map.find(keys.get(i));
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i = (i + 1) % n;
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})
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}
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pub fn find_seq_n<M:MutableMap<uint,uint>>(n: uint,
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map: &mut M,
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bh: &mut BenchHarness) {
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// setup
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for i in range(0u, n) {
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map.insert(i, 1);
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}
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// measure
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let mut i = 0;
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bh.iter(|| {
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let x = map.find(&i);
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i = (i + 1) % n;
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x
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})
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}
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}
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