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remove TreeMap, TreeSet, TrieMap, TrieSet, LruCache. deprecate EnumSet's std re-export

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This commit is contained in:
Alexis Beingessner 2014-12-16 22:33:13 -05:00
parent f9a48492a8
commit 6c00f9c5ff
9 changed files with 13 additions and 6682 deletions
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22
src/libcollections/lib.rs
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@ -46,10 +46,6 @@ pub use dlist::DList;
pub use enum_set::EnumSet;
pub use ring_buf::RingBuf;
pub use string::String;
pub use tree_map::TreeMap;
pub use tree_set::TreeSet;
pub use trie_map::TrieMap;
pub use trie_set::TrieSet;
pub use vec::Vec;
pub use vec_map::VecMap;
@ -61,8 +57,6 @@ mod btree;
pub mod dlist;
pub mod enum_set;
pub mod ring_buf;
mod tree;
mod trie;
pub mod slice;
pub mod str;
pub mod string;
@ -77,22 +71,6 @@ pub mod bitv_set {
pub use bit::{BitvSet, BitPositions, TwoBitPositions};
}
pub mod tree_map {
pub use tree::map::*;
}
pub mod tree_set {
pub use tree::set::*;
}
pub mod trie_map {
pub use trie::map::*;
}
pub mod trie_set {
pub use trie::set::*;
}
pub mod btree_map {
pub use btree::map::*;
}

1961
src/libcollections/tree/map.rs
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35
src/libcollections/tree/mod.rs
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@ -1,35 +0,0 @@
// Copyright 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.
//! Maps are collections of unique keys with corresponding values, and sets are
//! just unique keys without a corresponding value.
//!
//! This crate defines the `TreeMap` and `TreeSet` types. Their keys must implement `Ord`.
//!
//! `TreeMap`s are ordered.
//!
//! # Examples
//!
//! ```{rust}
//! use std::collections::TreeSet;
//!
//! let mut tree_set = TreeSet::new();
//!
//! tree_set.insert(2i);
//! tree_set.insert(1i);
//! tree_set.insert(3i);
//!
//! for i in tree_set.iter() {
//! println!("{}", i) // prints 1, then 2, then 3
//! }
//! ```
pub mod map;
pub mod set;

1218
src/libcollections/tree/set.rs
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1958
src/libcollections/trie/map.rs
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19
src/libcollections/trie/mod.rs
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@ -1,19 +0,0 @@
// Copyright 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.
//! Maps are collections of unique keys with corresponding values, and sets are
//! just unique keys without a corresponding value.
//!
//! This crate defines `TrieMap` and `TrieSet`, which require `uint` keys.
//!
//! `TrieMap` is ordered.
pub mod map;
pub mod set;

972
src/libcollections/trie/set.rs
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@ -1,972 +0,0 @@
// Copyright 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.
// FIXME(conventions): implement bounded iterators
// FIXME(conventions): replace each_reverse by making iter DoubleEnded
// FIXME(conventions): implement iter_mut and into_iter
use core::prelude::*;
use core::default::Default;
use core::fmt;
use core::fmt::Show;
use core::iter::Peekable;
use std::hash::Hash;
use trie_map::{TrieMap, Entries};
/// A set implemented as a radix trie.
///
/// # Examples
///
/// ```
/// use std::collections::TrieSet;
///
/// let mut set = TrieSet::new();
/// set.insert(6);
/// set.insert(28);
/// set.insert(6);
///
/// assert_eq!(set.len(), 2);
///
/// if !set.contains(&3) {
/// println!("3 is not in the set");
/// }
///
/// // Print contents in order
/// for x in set.iter() {
/// println!("{}", x);
/// }
///
/// set.remove(&6);
/// assert_eq!(set.len(), 1);
///
/// set.clear();
/// assert!(set.is_empty());
/// ```
#[deriving(Clone, Hash, PartialEq, Eq, PartialOrd, Ord)]
pub struct TrieSet {
map: TrieMap<()>
}
impl Show for TrieSet {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
try!(write!(f, "{{"));
for (i, x) in self.iter().enumerate() {
if i != 0 { try!(write!(f, ", ")); }
try!(write!(f, "{}", x));
}
write!(f, "}}")
}
}
#[stable]
impl Default for TrieSet {
#[inline]
#[stable]
fn default() -> TrieSet { TrieSet::new() }
}
impl TrieSet {
/// Creates an empty TrieSet.
///
/// # Examples
///
/// ```
/// use std::collections::TrieSet;
/// let mut set = TrieSet::new();
/// ```
#[inline]
#[unstable = "matches collection reform specification, waiting for dust to settle"]
pub fn new() -> TrieSet {
TrieSet{map: TrieMap::new()}
}
/// Visits all values in reverse order. Aborts traversal when `f` returns `false`.
/// Returns `true` if `f` returns `true` for all elements.
///
/// # Examples
///
/// ```
/// use std::collections::TrieSet;
///
/// let set: TrieSet = [1, 2, 3, 4, 5].iter().map(|&x| x).collect();
///
/// let mut vec = Vec::new();
/// assert_eq!(true, set.each_reverse(|&x| { vec.push(x); true }));
/// assert_eq!(vec, vec![5, 4, 3, 2, 1]);
///
/// // Stop when we reach 3
/// let mut vec = Vec::new();
/// assert_eq!(false, set.each_reverse(|&x| { vec.push(x); x != 3 }));
/// assert_eq!(vec, vec![5, 4, 3]);
/// ```
#[inline]
pub fn each_reverse(&self, f: |&uint| -> bool) -> bool {
self.map.each_reverse(|k, _| f(k))
}
/// Gets an iterator over the values in the set, in sorted order.
///
/// # Examples
///
/// ```
/// use std::collections::TrieSet;
///
/// let mut set = TrieSet::new();
/// set.insert(3);
/// set.insert(2);
/// set.insert(1);
/// set.insert(2);
///
/// // Print 1, 2, 3
/// for x in set.iter() {
/// println!("{}", x);
/// }
/// ```
#[inline]
#[unstable = "matches collection reform specification, waiting for dust to settle"]
pub fn iter<'a>(&'a self) -> SetItems<'a> {
SetItems{iter: self.map.iter()}
}
/// Gets an iterator pointing to the first value that is not less than `val`.
/// If all values in the set are less than `val` an empty iterator is returned.
///
/// # Examples
///
/// ```
/// use std::collections::TrieSet;
///
/// let set: TrieSet = [2, 4, 6, 8].iter().map(|&x| x).collect();
/// assert_eq!(set.lower_bound(4).next(), Some(4));
/// assert_eq!(set.lower_bound(5).next(), Some(6));
/// assert_eq!(set.lower_bound(10).next(), None);
/// ```
pub fn lower_bound<'a>(&'a self, val: uint) -> SetItems<'a> {
SetItems{iter: self.map.lower_bound(val)}
}
/// Gets an iterator pointing to the first value that key is greater than `val`.
/// If all values in the set are less than or equal to `val` an empty iterator is returned.
///
/// # Examples
///
/// ```
/// use std::collections::TrieSet;
///
/// let set: TrieSet = [2, 4, 6, 8].iter().map(|&x| x).collect();
/// assert_eq!(set.upper_bound(4).next(), Some(6));
/// assert_eq!(set.upper_bound(5).next(), Some(6));
/// assert_eq!(set.upper_bound(10).next(), None);
/// ```
pub fn upper_bound<'a>(&'a self, val: uint) -> SetItems<'a> {
SetItems{iter: self.map.upper_bound(val)}
}
/// Visits the values representing the difference, in ascending order.
///
/// # Examples
///
/// ```
/// use std::collections::TrieSet;
///
/// let a: TrieSet = [1, 2, 3].iter().map(|&x| x).collect();
/// let b: TrieSet = [3, 4, 5].iter().map(|&x| x).collect();
///
/// // Can be seen as `a - b`.
/// for x in a.difference(&b) {
/// println!("{}", x); // Print 1 then 2
/// }
///
/// let diff1: TrieSet = a.difference(&b).collect();
/// assert_eq!(diff1, [1, 2].iter().map(|&x| x).collect());
///
/// // Note that difference is not symmetric,
/// // and `b - a` means something else:
/// let diff2: TrieSet = b.difference(&a).collect();
/// assert_eq!(diff2, [4, 5].iter().map(|&x| x).collect());
/// ```
#[unstable = "matches collection reform specification, waiting for dust to settle"]
pub fn difference<'a>(&'a self, other: &'a TrieSet) -> DifferenceItems<'a> {
DifferenceItems{a: self.iter().peekable(), b: other.iter().peekable()}
}
/// Visits the values representing the symmetric difference, in ascending order.
///
/// # Examples
///
/// ```
/// use std::collections::TrieSet;
///
/// let a: TrieSet = [1, 2, 3].iter().map(|&x| x).collect();
/// let b: TrieSet = [3, 4, 5].iter().map(|&x| x).collect();
///
/// // Print 1, 2, 4, 5 in ascending order.
/// for x in a.symmetric_difference(&b) {
/// println!("{}", x);
/// }
///
/// let diff1: TrieSet = a.symmetric_difference(&b).collect();
/// let diff2: TrieSet = b.symmetric_difference(&a).collect();
///
/// assert_eq!(diff1, diff2);
/// assert_eq!(diff1, [1, 2, 4, 5].iter().map(|&x| x).collect());
/// ```
#[unstable = "matches collection reform specification, waiting for dust to settle."]
pub fn symmetric_difference<'a>(&'a self, other: &'a TrieSet) -> SymDifferenceItems<'a> {
SymDifferenceItems{a: self.iter().peekable(), b: other.iter().peekable()}
}
/// Visits the values representing the intersection, in ascending order.
///
/// # Examples
///
/// ```
/// use std::collections::TrieSet;
///
/// let a: TrieSet = [1, 2, 3].iter().map(|&x| x).collect();
/// let b: TrieSet = [2, 3, 4].iter().map(|&x| x).collect();
///
/// // Print 2, 3 in ascending order.
/// for x in a.intersection(&b) {
/// println!("{}", x);
/// }
///
/// let diff: TrieSet = a.intersection(&b).collect();
/// assert_eq!(diff, [2, 3].iter().map(|&x| x).collect());
/// ```
#[unstable = "matches collection reform specification, waiting for dust to settle"]
pub fn intersection<'a>(&'a self, other: &'a TrieSet) -> IntersectionItems<'a> {
IntersectionItems{a: self.iter().peekable(), b: other.iter().peekable()}
}
/// Visits the values representing the union, in ascending order.
///
/// # Examples
///
/// ```
/// use std::collections::TrieSet;
///
/// let a: TrieSet = [1, 2, 3].iter().map(|&x| x).collect();
/// let b: TrieSet = [3, 4, 5].iter().map(|&x| x).collect();
///
/// // Print 1, 2, 3, 4, 5 in ascending order.
/// for x in a.union(&b) {
/// println!("{}", x);
/// }
///
/// let diff: TrieSet = a.union(&b).collect();
/// assert_eq!(diff, [1, 2, 3, 4, 5].iter().map(|&x| x).collect());
/// ```
#[unstable = "matches collection reform specification, waiting for dust to settle"]
pub fn union<'a>(&'a self, other: &'a TrieSet) -> UnionItems<'a> {
UnionItems{a: self.iter().peekable(), b: other.iter().peekable()}
}
/// Return the number of elements in the set
///
/// # Examples
///
/// ```
/// use std::collections::TrieSet;
///
/// let mut v = TrieSet::new();
/// assert_eq!(v.len(), 0);
/// v.insert(1);
/// assert_eq!(v.len(), 1);
/// ```
#[inline]
#[unstable = "matches collection reform specification, waiting for dust to settle"]
pub fn len(&self) -> uint { self.map.len() }
/// Returns true if the set contains no elements
///
/// # Examples
///
/// ```
/// use std::collections::TrieSet;
///
/// let mut v = TrieSet::new();
/// assert!(v.is_empty());
/// v.insert(1);
/// assert!(!v.is_empty());
/// ```
#[unstable = "matches collection reform specification, waiting for dust to settle"]
pub fn is_empty(&self) -> bool { self.len() == 0 }
/// Clears the set, removing all values.
///
/// # Examples
///
/// ```
/// use std::collections::TrieSet;
///
/// let mut v = TrieSet::new();
/// v.insert(1);
/// v.clear();
/// assert!(v.is_empty());
/// ```
#[inline]
#[unstable = "matches collection reform specification, waiting for dust to settle"]
pub fn clear(&mut self) { self.map.clear() }
/// Returns `true` if the set contains a value.
///
/// # Examples
///
/// ```
/// use std::collections::TrieSet;
///
/// let set: TrieSet = [1, 2, 3].iter().map(|&x| x).collect();
/// assert_eq!(set.contains(&1), true);
/// assert_eq!(set.contains(&4), false);
/// ```
#[inline]
#[unstable = "matches collection reform specification, waiting for dust to settle"]
pub fn contains(&self, value: &uint) -> bool {
self.map.contains_key(value)
}
/// Returns `true` if the set has no elements in common with `other`.
/// This is equivalent to checking for an empty intersection.
///
/// # Examples
///
/// ```
/// use std::collections::TrieSet;
///
/// let a: TrieSet = [1, 2, 3].iter().map(|&x| x).collect();
/// let mut b: TrieSet = TrieSet::new();
///
/// assert_eq!(a.is_disjoint(&b), true);
/// b.insert(4);
/// assert_eq!(a.is_disjoint(&b), true);
/// b.insert(1);
/// assert_eq!(a.is_disjoint(&b), false);
/// ```
#[inline]
#[unstable = "matches collection reform specification, waiting for dust to settle"]
pub fn is_disjoint(&self, other: &TrieSet) -> bool {
self.iter().all(|v| !other.contains(&v))
}
/// Returns `true` if the set is a subset of another.
///
/// # Examples
///
/// ```
/// use std::collections::TrieSet;
///
/// let sup: TrieSet = [1, 2, 3].iter().map(|&x| x).collect();
/// let mut set: TrieSet = TrieSet::new();
///
/// assert_eq!(set.is_subset(&sup), true);
/// set.insert(2);
/// assert_eq!(set.is_subset(&sup), true);
/// set.insert(4);
/// assert_eq!(set.is_subset(&sup), false);
/// ```
#[inline]
#[unstable = "matches collection reform specification, waiting for dust to settle"]
pub fn is_subset(&self, other: &TrieSet) -> bool {
self.iter().all(|v| other.contains(&v))
}
/// Returns `true` if the set is a superset of another.
///
/// # Examples
///
/// ```
/// use std::collections::TrieSet;
///
/// let sub: TrieSet = [1, 2].iter().map(|&x| x).collect();
/// let mut set: TrieSet = TrieSet::new();
///
/// assert_eq!(set.is_superset(&sub), false);
///
/// set.insert(0);
/// set.insert(1);
/// assert_eq!(set.is_superset(&sub), false);
///
/// set.insert(2);
/// assert_eq!(set.is_superset(&sub), true);
/// ```
#[inline]
#[unstable = "matches collection reform specification, waiting for dust to settle"]
pub fn is_superset(&self, other: &TrieSet) -> bool {
other.is_subset(self)
}
/// Adds a value to the set. Returns `true` if the value was not already
/// present in the set.
///
/// # Examples
///
/// ```
/// use std::collections::TrieSet;
///
/// let mut set = TrieSet::new();
///
/// assert_eq!(set.insert(2), true);
/// assert_eq!(set.insert(2), false);
/// assert_eq!(set.len(), 1);
/// ```
#[inline]
#[unstable = "matches collection reform specification, waiting for dust to settle"]
pub fn insert(&mut self, value: uint) -> bool {
self.map.insert(value, ()).is_none()
}
/// Removes a value from the set. Returns `true` if the value was
/// present in the set.
///
/// # Examples
///
/// ```
/// use std::collections::TrieSet;
///
/// let mut set = TrieSet::new();
///
/// set.insert(2);
/// assert_eq!(set.remove(&2), true);
/// assert_eq!(set.remove(&2), false);
/// ```
#[inline]
#[unstable = "matches collection reform specification, waiting for dust to settle"]
pub fn remove(&mut self, value: &uint) -> bool {
self.map.remove(value).is_some()
}
}
impl FromIterator<uint> for TrieSet {
fn from_iter<Iter: Iterator<uint>>(iter: Iter) -> TrieSet {
let mut set = TrieSet::new();
set.extend(iter);
set
}
}
impl Extend<uint> for TrieSet {
fn extend<Iter: Iterator<uint>>(&mut self, mut iter: Iter) {
for elem in iter {
self.insert(elem);
}
}
}
// NOTE(stage0): Remove impl after a snapshot
#[cfg(stage0)]
#[unstable = "matches collection reform specification, waiting for dust to settle"]
impl BitOr<TrieSet, TrieSet> for TrieSet {
/// Returns the union of `self` and `rhs` as a new `TrieSet`.
///
/// # Examples
///
/// ```
/// use std::collections::TrieSet;
///
/// let a: TrieSet = vec![1, 2, 3].into_iter().collect();
/// let b: TrieSet = vec![3, 4, 5].into_iter().collect();
///
/// let set: TrieSet = a | b;
/// let v: Vec<uint> = set.iter().collect();
/// assert_eq!(v, vec![1u, 2, 3, 4, 5]);
/// ```
fn bitor(&self, rhs: &TrieSet) -> TrieSet {
self.union(rhs).collect()
}
}
#[cfg(not(stage0))] // NOTE(stage0): Remove cfg after a snapshot
#[unstable = "matches collection reform specification, waiting for dust to settle"]
impl<'a, 'b> BitOr<&'b TrieSet, TrieSet> for &'a TrieSet {
/// Returns the union of `self` and `rhs` as a new `TrieSet`.
///
/// # Example
///
/// ```
/// use std::collections::TrieSet;
///
/// let a: TrieSet = vec![1, 2, 3].into_iter().collect();
/// let b: TrieSet = vec![3, 4, 5].into_iter().collect();
///
/// let set: TrieSet = &a | &b;
/// let v: Vec<uint> = set.iter().collect();
/// assert_eq!(v, vec![1u, 2, 3, 4, 5]);
/// ```
fn bitor(self, rhs: &TrieSet) -> TrieSet {
self.union(rhs).collect()
}
}
// NOTE(stage0): Remove impl after a snapshot
#[cfg(stage0)]
#[unstable = "matches collection reform specification, waiting for dust to settle"]
impl BitAnd<TrieSet, TrieSet> for TrieSet {
/// Returns the intersection of `self` and `rhs` as a new `TrieSet`.
///
/// # Examples
///
/// ```
/// use std::collections::TrieSet;
///
/// let a: TrieSet = vec![1, 2, 3].into_iter().collect();
/// let b: TrieSet = vec![2, 3, 4].into_iter().collect();
///
/// let set: TrieSet = a & b;
/// let v: Vec<uint> = set.iter().collect();
/// assert_eq!(v, vec![2u, 3]);
/// ```
fn bitand(&self, rhs: &TrieSet) -> TrieSet {
self.intersection(rhs).collect()
}
}
#[cfg(not(stage0))] // NOTE(stage0): Remove cfg after a snapshot
#[unstable = "matches collection reform specification, waiting for dust to settle"]
impl<'a, 'b> BitAnd<&'b TrieSet, TrieSet> for &'a TrieSet {
/// Returns the intersection of `self` and `rhs` as a new `TrieSet`.
///
/// # Example
///
/// ```
/// use std::collections::TrieSet;
///
/// let a: TrieSet = vec![1, 2, 3].into_iter().collect();
/// let b: TrieSet = vec![2, 3, 4].into_iter().collect();
///
/// let set: TrieSet = &a & &b;
/// let v: Vec<uint> = set.iter().collect();
/// assert_eq!(v, vec![2u, 3]);
/// ```
fn bitand(self, rhs: &TrieSet) -> TrieSet {
self.intersection(rhs).collect()
}
}
// NOTE(stage0): Remove impl after a snapshot
#[cfg(stage0)]
#[unstable = "matches collection reform specification, waiting for dust to settle"]
impl BitXor<TrieSet, TrieSet> for TrieSet {
/// Returns the symmetric difference of `self` and `rhs` as a new `TrieSet`.
///
/// # Examples
///
/// ```
/// use std::collections::TrieSet;
///
/// let a: TrieSet = vec![1, 2, 3].into_iter().collect();
/// let b: TrieSet = vec![3, 4, 5].into_iter().collect();
///
/// let set: TrieSet = a ^ b;
/// let v: Vec<uint> = set.iter().collect();
/// assert_eq!(v, vec![1u, 2, 4, 5]);
/// ```
fn bitxor(&self, rhs: &TrieSet) -> TrieSet {
self.symmetric_difference(rhs).collect()
}
}
#[cfg(not(stage0))] // NOTE(stage0): Remove cfg after a snapshot
#[unstable = "matches collection reform specification, waiting for dust to settle"]
impl<'a, 'b> BitXor<&'b TrieSet, TrieSet> for &'a TrieSet {
/// Returns the symmetric difference of `self` and `rhs` as a new `TrieSet`.
///
/// # Example
///
/// ```
/// use std::collections::TrieSet;
///
/// let a: TrieSet = vec![1, 2, 3].into_iter().collect();
/// let b: TrieSet = vec![3, 4, 5].into_iter().collect();
///
/// let set: TrieSet = &a ^ &b;
/// let v: Vec<uint> = set.iter().collect();
/// assert_eq!(v, vec![1u, 2, 4, 5]);
/// ```
fn bitxor(self, rhs: &TrieSet) -> TrieSet {
self.symmetric_difference(rhs).collect()
}
}
// NOTE(stage0): Remove impl after a snapshot
#[cfg(stage0)]
#[unstable = "matches collection reform specification, waiting for dust to settle"]
impl Sub<TrieSet, TrieSet> for TrieSet {
/// Returns the difference of `self` and `rhs` as a new `TrieSet`.
///
/// # Examples
///
/// ```
/// use std::collections::TrieSet;
///
/// let a: TrieSet = vec![1, 2, 3].into_iter().collect();
/// let b: TrieSet = vec![3, 4, 5].into_iter().collect();
///
/// let set: TrieSet = a - b;
/// let v: Vec<uint> = set.iter().collect();
/// assert_eq!(v, vec![1u, 2]);
/// ```
fn sub(&self, rhs: &TrieSet) -> TrieSet {
self.difference(rhs).collect()
}
}
#[cfg(not(stage0))] // NOTE(stage0): Remove cfg after a snapshot
#[unstable = "matches collection reform specification, waiting for dust to settle"]
impl<'a, 'b> Sub<&'b TrieSet, TrieSet> for &'a TrieSet {
/// Returns the difference of `self` and `rhs` as a new `TrieSet`.
///
/// # Example
///
/// ```
/// use std::collections::TrieSet;
///
/// let a: TrieSet = vec![1, 2, 3].into_iter().collect();
/// let b: TrieSet = vec![3, 4, 5].into_iter().collect();
///
/// let set: TrieSet = &a - &b;
/// let v: Vec<uint> = set.iter().collect();
/// assert_eq!(v, vec![1u, 2]);
/// ```
fn sub(self, rhs: &TrieSet) -> TrieSet {
self.difference(rhs).collect()
}
}
/// A forward iterator over a set.
pub struct SetItems<'a> {
iter: Entries<'a, ()>
}
/// An iterator producing elements in the set difference (in-order).
pub struct DifferenceItems<'a> {
a: Peekable<uint, SetItems<'a>>,
b: Peekable<uint, SetItems<'a>>,
}
/// An iterator producing elements in the set symmetric difference (in-order).
pub struct SymDifferenceItems<'a> {
a: Peekable<uint, SetItems<'a>>,
b: Peekable<uint, SetItems<'a>>,
}
/// An iterator producing elements in the set intersection (in-order).
pub struct IntersectionItems<'a> {
a: Peekable<uint, SetItems<'a>>,
b: Peekable<uint, SetItems<'a>>,
}
/// An iterator producing elements in the set union (in-order).
pub struct UnionItems<'a> {
a: Peekable<uint, SetItems<'a>>,
b: Peekable<uint, SetItems<'a>>,
}
/// Compare `x` and `y`, but return `short` if x is None and `long` if y is None
fn cmp_opt(x: Option<&uint>, y: Option<&uint>, short: Ordering, long: Ordering) -> Ordering {
match (x, y) {
(None , _ ) => short,
(_ , None ) => long,
(Some(x1), Some(y1)) => x1.cmp(y1),
}
}
impl<'a> Iterator<uint> for SetItems<'a> {
fn next(&mut self) -> Option<uint> {
self.iter.next().map(|(key, _)| key)
}
fn size_hint(&self) -> (uint, Option<uint>) {
self.iter.size_hint()
}
}
impl<'a> Iterator<uint> for DifferenceItems<'a> {
fn next(&mut self) -> Option<uint> {
loop {
match cmp_opt(self.a.peek(), self.b.peek(), Less, Less) {
Less => return self.a.next(),
Equal => { self.a.next(); self.b.next(); }
Greater => { self.b.next(); }
}
}
}
}
impl<'a> Iterator<uint> for SymDifferenceItems<'a> {
fn next(&mut self) -> Option<uint> {
loop {
match cmp_opt(self.a.peek(), self.b.peek(), Greater, Less) {
Less => return self.a.next(),
Equal => { self.a.next(); self.b.next(); }
Greater => return self.b.next(),
}
}
}
}
impl<'a> Iterator<uint> for IntersectionItems<'a> {
fn next(&mut self) -> Option<uint> {
loop {
let o_cmp = match (self.a.peek(), self.b.peek()) {
(None , _ ) => None,
(_ , None ) => None,
(Some(a1), Some(b1)) => Some(a1.cmp(b1)),
};
match o_cmp {
None => return None,
Some(Less) => { self.a.next(); }
Some(Equal) => { self.b.next(); return self.a.next() }
Some(Greater) => { self.b.next(); }
}
}
}
}
impl<'a> Iterator<uint> for UnionItems<'a> {
fn next(&mut self) -> Option<uint> {
loop {
match cmp_opt(self.a.peek(), self.b.peek(), Greater, Less) {
Less => return self.a.next(),
Equal => { self.b.next(); return self.a.next() }
Greater => return self.b.next(),
}
}
}
}
#[cfg(test)]
mod test {
use std::prelude::*;
use std::uint;
use vec::Vec;
use super::TrieSet;
#[test]
fn test_sane_chunk() {
let x = 1;
let y = 1 << (uint::BITS - 1);
let mut trie = TrieSet::new();
assert!(trie.insert(x));
assert!(trie.insert(y));
assert_eq!(trie.len(), 2);
let expected = [x, y];
for (i, x) in trie.iter().enumerate() {
assert_eq!(expected[i], x);
}
}
#[test]
fn test_from_iter() {
let xs = vec![9u, 8, 7, 6, 5, 4, 3, 2, 1];
let set: TrieSet = xs.iter().map(|&x| x).collect();
for x in xs.iter() {
assert!(set.contains(x));
}
}
#[test]
fn test_show() {
let mut set = TrieSet::new();
let empty = TrieSet::new();
set.insert(1);
set.insert(2);
let set_str = format!("{}", set);
assert!(set_str == "{1, 2}");
assert_eq!(format!("{}", empty), "{}");
}
#[test]
fn test_clone() {
let mut a = TrieSet::new();
a.insert(1);
a.insert(2);
a.insert(3);
assert!(a.clone() == a);
}
#[test]
fn test_lt() {
let mut a = TrieSet::new();
let mut b = TrieSet::new();
assert!(!(a < b) && !(b < a));
assert!(b.insert(2u));
assert!(a < b);
assert!(a.insert(3u));
assert!(!(a < b) && b < a);
assert!(b.insert(1));
assert!(b < a);
assert!(a.insert(0));
assert!(a < b);
assert!(a.insert(6));
assert!(a < b && !(b < a));
}
#[test]
fn test_ord() {
let mut a = TrieSet::new();
let mut b = TrieSet::new();
assert!(a <= b && a >= b);
assert!(a.insert(1u));
assert!(a > b && a >= b);
assert!(b < a && b <= a);
assert!(b.insert(2u));
assert!(b > a && b >= a);
assert!(a < b && a <= b);
}
struct Counter<'a, 'b> {
i: &'a mut uint,
expected: &'b [uint],
}
impl<'a, 'b> FnMut(uint) -> bool for Counter<'a, 'b> {
extern "rust-call" fn call_mut(&mut self, (x,): (uint,)) -> bool {
assert_eq!(x, self.expected[*self.i]);
*self.i += 1;
true
}
}
fn check<F>(a: &[uint], b: &[uint], expected: &[uint], f: F) where
// FIXME Replace `Counter` with `Box<FnMut(&uint) -> bool>`
F: FnOnce(&TrieSet, &TrieSet, Counter) -> bool,
{
let mut set_a = TrieSet::new();
let mut set_b = TrieSet::new();
for x in a.iter() { assert!(set_a.insert(*x)) }
for y in b.iter() { assert!(set_b.insert(*y)) }
let mut i = 0;
f(&set_a, &set_b, Counter { i: &mut i, expected: expected });
assert_eq!(i, expected.len());
}
#[test]
fn test_intersection() {
fn check_intersection(a: &[uint], b: &[uint], expected: &[uint]) {
check(a, b, expected, |x, y, f| x.intersection(y).all(f))
}
check_intersection(&[], &[], &[]);
check_intersection(&[1, 2, 3], &[], &[]);
check_intersection(&[], &[1, 2, 3], &[]);
check_intersection(&[2], &[1, 2, 3], &[2]);
check_intersection(&[1, 2, 3], &[2], &[2]);
check_intersection(&[11, 1, 3, 77, 103, 5],
&[2, 11, 77, 5, 3],
&[3, 5, 11, 77]);
}
#[test]
fn test_difference() {
fn check_difference(a: &[uint], b: &[uint], expected: &[uint]) {
check(a, b, expected, |x, y, f| x.difference(y).all(f))
}
check_difference(&[], &[], &[]);
check_difference(&[1, 12], &[], &[1, 12]);
check_difference(&[], &[1, 2, 3, 9], &[]);
check_difference(&[1, 3, 5, 9, 11],
&[3, 9],
&[1, 5, 11]);
check_difference(&[11, 22, 33, 40, 42],
&[14, 23, 34, 38, 39, 50],
&[11, 22, 33, 40, 42]);
}
#[test]
fn test_symmetric_difference() {
fn check_symmetric_difference(a: &[uint], b: &[uint], expected: &[uint]) {
check(a, b, expected, |x, y, f| x.symmetric_difference(y).all(f))
}
check_symmetric_difference(&[], &[], &[]);
check_symmetric_difference(&[1, 2, 3], &[2], &[1, 3]);
check_symmetric_difference(&[2], &[1, 2, 3], &[1, 3]);
check_symmetric_difference(&[1, 3, 5, 9, 11],
&[3, 9, 14, 22],
&[1, 5, 11, 14, 22]);
}
#[test]
fn test_union() {
fn check_union(a: &[uint], b: &[uint], expected: &[uint]) {
check(a, b, expected, |x, y, f| x.union(y).all(f))
}
check_union(&[], &[], &[]);
check_union(&[1, 2, 3], &[2], &[1, 2, 3]);
check_union(&[2], &[1, 2, 3], &[1, 2, 3]);
check_union(&[1, 3, 5, 9, 11, 16, 19, 24],
&[1, 5, 9, 13, 19],
&[1, 3, 5, 9, 11, 13, 16, 19, 24]);
}
#[test]
fn test_bit_or() {
let a: TrieSet = vec![1, 2, 3].into_iter().collect();
let b: TrieSet = vec![3, 4, 5].into_iter().collect();
let set: TrieSet = &a | &b;
let v: Vec<uint> = set.iter().collect();
assert_eq!(v, vec![1u, 2, 3, 4, 5]);
}
#[test]
fn test_bit_and() {
let a: TrieSet = vec![1, 2, 3].into_iter().collect();
let b: TrieSet = vec![2, 3, 4].into_iter().collect();
let set: TrieSet = &a & &b;
let v: Vec<uint> = set.iter().collect();
assert_eq!(v, vec![2u, 3]);
}
#[test]
fn test_bit_xor() {
let a: TrieSet = vec![1, 2, 3].into_iter().collect();
let b: TrieSet = vec![3, 4, 5].into_iter().collect();
let set: TrieSet = &a ^ &b;
let v: Vec<uint> = set.iter().collect();
assert_eq!(v, vec![1u, 2, 4, 5]);
}
#[test]
fn test_sub() {
let a: TrieSet = vec![1, 2, 3].into_iter().collect();
let b: TrieSet = vec![3, 4, 5].into_iter().collect();
let set: TrieSet = &a - &b;
let v: Vec<uint> = set.iter().collect();
assert_eq!(v, vec![1u, 2]);
}
}

471
src/libstd/collections/lru_cache.rs
View file

@ -1,471 +0,0 @@
// Copyright 2013 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.
//! A cache that holds a limited number of key-value pairs. When the
//! capacity of the cache is exceeded, the least-recently-used
//! (where "used" means a look-up or putting the pair into the cache)
//! pair is automatically removed.
//!
//! # Example
//!
//! ```rust
//! use std::collections::LruCache;
//!
//! let mut cache: LruCache<int, int> = LruCache::new(2);
//! cache.insert(1, 10);
//! cache.insert(2, 20);
//! cache.insert(3, 30);
//! assert!(cache.get(&1).is_none());
//! assert_eq!(*cache.get(&2).unwrap(), 20);
//! assert_eq!(*cache.get(&3).unwrap(), 30);
//!
//! cache.insert(2, 22);
//! assert_eq!(*cache.get(&2).unwrap(), 22);
//!
//! cache.insert(6, 60);
//! assert!(cache.get(&3).is_none());
//!
//! cache.set_capacity(1);
//! assert!(cache.get(&2).is_none());
//! ```
use cmp::{PartialEq, Eq};
use collections::HashMap;
use fmt;
use hash::Hash;
use iter::{range, Iterator, Extend};
use mem;
use ops::Drop;
use option::Option;
use option::Option::{Some, None};
use boxed::Box;
use ptr;
use result::Result::{Ok, Err};
// FIXME(conventions): implement iterators?
// FIXME(conventions): implement indexing?
struct KeyRef<K> { k: *const K }
struct LruEntry<K, V> {
next: *mut LruEntry<K, V>,
prev: *mut LruEntry<K, V>,
key: K,
value: V,
}
/// An LRU Cache.
pub struct LruCache<K, V> {
map: HashMap<KeyRef<K>, Box<LruEntry<K, V>>>,
max_size: uint,
head: *mut LruEntry<K, V>,
}
impl<S, K: Hash<S>> Hash<S> for KeyRef<K> {
fn hash(&self, state: &mut S) {
unsafe { (*self.k).hash(state) }
}
}
impl<K: PartialEq> PartialEq for KeyRef<K> {
fn eq(&self, other: &KeyRef<K>) -> bool {
unsafe{ (*self.k).eq(&*other.k) }
}
}
impl<K: Eq> Eq for KeyRef<K> {}
impl<K, V> LruEntry<K, V> {
fn new(k: K, v: V) -> LruEntry<K, V> {
LruEntry {
key: k,
value: v,
next: ptr::null_mut(),
prev: ptr::null_mut(),
}
}
}
impl<K: Hash + Eq, V> LruCache<K, V> {
/// Create an LRU Cache that holds at most `capacity` items.
///
/// # Example
///
/// ```
/// use std::collections::LruCache;
/// let mut cache: LruCache<int, &str> = LruCache::new(10);
/// ```
#[unstable = "matches collection reform specification, waiting for dust to settle"]
pub fn new(capacity: uint) -> LruCache<K, V> {
let cache = LruCache {
map: HashMap::new(),
max_size: capacity,
head: unsafe{ mem::transmute(box mem::uninitialized::<LruEntry<K, V>>()) },
};
unsafe {
(*cache.head).next = cache.head;
(*cache.head).prev = cache.head;
}
return cache;
}
/// Deprecated: Replaced with `insert`.
#[deprecated = "Replaced with `insert`"]
pub fn put(&mut self, k: K, v: V) {
self.insert(k, v);
}
/// Inserts a key-value pair into the cache. If the key already existed, the old value is
/// returned.
///
/// # Example
///
/// ```
/// use std::collections::LruCache;
/// let mut cache = LruCache::new(2);
///
/// cache.insert(1i, "a");
/// cache.insert(2, "b");
/// assert_eq!(cache.get(&1), Some(&"a"));
/// assert_eq!(cache.get(&2), Some(&"b"));
/// ```
#[unstable = "matches collection reform specification, waiting for dust to settle"]
pub fn insert(&mut self, k: K, v: V) -> Option<V> {
let (node_ptr, node_opt, old_val) = match self.map.get_mut(&KeyRef{k: &k}) {
Some(node) => {
let old_val = mem::replace(&mut node.value, v);
let node_ptr: *mut LruEntry<K, V> = &mut **node;
(node_ptr, None, Some(old_val))
}
None => {
let mut node = box LruEntry::new(k, v);
let node_ptr: *mut LruEntry<K, V> = &mut *node;
(node_ptr, Some(node), None)
}
};
match node_opt {
None => {
// Existing node, just update LRU position
self.detach(node_ptr);
self.attach(node_ptr);
}
Some(node) => {
let keyref = unsafe { &(*node_ptr).key };
self.map.insert(KeyRef{k: keyref}, node);
self.attach(node_ptr);
if self.len() > self.capacity() {
self.remove_lru();
}
}
}
old_val
}
/// Return a value corresponding to the key in the cache.
///
/// # Example
///
/// ```
/// use std::collections::LruCache;
/// let mut cache = LruCache::new(2);
///
/// cache.insert(1i, "a");
/// cache.insert(2, "b");
/// cache.insert(2, "c");
/// cache.insert(3, "d");
///
/// assert_eq!(cache.get(&1), None);
/// assert_eq!(cache.get(&2), Some(&"c"));
/// ```
#[unstable = "matches collection reform specification, waiting for dust to settle"]
pub fn get(&mut self, k: &K) -> Option<&V> {
let (value, node_ptr_opt) = match self.map.get_mut(&KeyRef{k: k}) {
None => (None, None),
Some(node) => {
let node_ptr: *mut LruEntry<K, V> = &mut **node;
(Some(unsafe { &(*node_ptr).value }), Some(node_ptr))
}
};
match node_ptr_opt {
None => (),
Some(node_ptr) => {
self.detach(node_ptr);
self.attach(node_ptr);
}
}
return value;
}
/// Deprecated: Renamed to `remove`.
#[deprecated = "Renamed to `remove`"]
pub fn pop(&mut self, k: &K) -> Option<V> {
self.remove(k)
}
/// Remove and return a value corresponding to the key from the cache.
///
/// # Example
///
/// ```
/// use std::collections::LruCache;
/// let mut cache = LruCache::new(2);
///
/// cache.insert(2i, "a");
///
/// assert_eq!(cache.remove(&1), None);
/// assert_eq!(cache.remove(&2), Some("a"));
/// assert_eq!(cache.remove(&2), None);
/// assert_eq!(cache.len(), 0);
/// ```
#[unstable = "matches collection reform specification, waiting for dust to settle"]
pub fn remove(&mut self, k: &K) -> Option<V> {
match self.map.remove(&KeyRef{k: k}) {
None => None,
Some(lru_entry) => Some(lru_entry.value)
}
}
/// Return the maximum number of key-value pairs the cache can hold.
///
/// # Example
///
/// ```
/// use std::collections::LruCache;
/// let mut cache: LruCache<int, &str> = LruCache::new(2);
/// assert_eq!(cache.capacity(), 2);
/// ```
#[unstable = "matches collection reform specification, waiting for dust to settle"]
pub fn capacity(&self) -> uint {
self.max_size
}
/// Deprecated: Renamed to `set_capacity`.
#[deprecated = "Renamed to `set_capacity`"]
pub fn change_capacity(&mut self, capacity: uint) {
self.set_capacity(capacity)
}
/// Change the number of key-value pairs the cache can hold. Remove
/// least-recently-used key-value pairs if necessary.
///
/// # Example
///
/// ```
/// use std::collections::LruCache;
/// let mut cache = LruCache::new(2);
///
/// cache.insert(1i, "a");
/// cache.insert(2, "b");
/// cache.insert(3, "c");
///
/// assert_eq!(cache.get(&1), None);
/// assert_eq!(cache.get(&2), Some(&"b"));
/// assert_eq!(cache.get(&3), Some(&"c"));
///
/// cache.set_capacity(3);
/// cache.insert(1i, "a");
/// cache.insert(2, "b");
///
/// assert_eq!(cache.get(&1), Some(&"a"));
/// assert_eq!(cache.get(&2), Some(&"b"));
/// assert_eq!(cache.get(&3), Some(&"c"));
///
/// cache.set_capacity(1);
///
/// assert_eq!(cache.get(&1), None);
/// assert_eq!(cache.get(&2), None);
/// assert_eq!(cache.get(&3), Some(&"c"));
/// ```
#[unstable = "matches collection reform specification, waiting for dust to settle"]
pub fn set_capacity(&mut self, capacity: uint) {
for _ in range(capacity, self.len()) {
self.remove_lru();
}
self.max_size = capacity;
}
#[inline]
fn remove_lru(&mut self) {
if self.len() > 0 {
let lru = unsafe { (*self.head).prev };
self.detach(lru);
self.map.remove(&KeyRef{k: unsafe { &(*lru).key }});
}
}
#[inline]
fn detach(&mut self, node: *mut LruEntry<K, V>) {
unsafe {
(*(*node).prev).next = (*node).next;
(*(*node).next).prev = (*node).prev;
}
}
#[inline]
fn attach(&mut self, node: *mut LruEntry<K, V>) {
unsafe {
(*node).next = (*self.head).next;
(*node).prev = self.head;
(*self.head).next = node;
(*(*node).next).prev = node;
}
}
/// Return the number of key-value pairs in the cache.
#[unstable = "matches collection reform specification, waiting for dust to settle"]
pub fn len(&self) -> uint { self.map.len() }
/// Returns whether the cache is currently empty.
#[unstable = "matches collection reform specification, waiting for dust to settle"]
pub fn is_empty(&self) -> bool { self.len() == 0 }
/// Clear the cache of all key-value pairs.
#[unstable = "matches collection reform specification, waiting for dust to settle"]
pub fn clear(&mut self) { self.map.clear(); }
}
impl<K: Hash + Eq, V> Extend<(K, V)> for LruCache<K, V> {
fn extend<T: Iterator<(K, V)>>(&mut self, mut iter: T) {
for (k, v) in iter{
self.insert(k, v);
}
}
}
impl<A: fmt::Show + Hash + Eq, B: fmt::Show> fmt::Show for LruCache<A, B> {
/// Return a string that lists the key-value pairs from most-recently
/// used to least-recently used.
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
try!(write!(f, "{{"));
let mut cur = self.head;
for i in range(0, self.len()) {
if i > 0 { try!(write!(f, ", ")) }
unsafe {
cur = (*cur).next;
try!(write!(f, "{}", (*cur).key));
}
try!(write!(f, ": "));
unsafe {
try!(write!(f, "{}", (*cur).value));
}
}
write!(f, r"}}")
}
}
#[unsafe_destructor]
impl<K, V> Drop for LruCache<K, V> {
fn drop(&mut self) {
unsafe {
let node: Box<LruEntry<K, V>> = mem::transmute(self.head);
// Prevent compiler from trying to drop the un-initialized field in the sigil node.
let box internal_node = node;
let LruEntry { next: _, prev: _, key: k, value: v } = internal_node;
mem::forget(k);
mem::forget(v);
}
}
}
#[cfg(test)]
mod tests {
use prelude::*;
use super::LruCache;
fn assert_opt_eq<V: PartialEq>(opt: Option<&V>, v: V) {
assert!(opt.is_some());
assert!(opt.unwrap() == &v);
}
#[test]
fn test_put_and_get() {
let mut cache: LruCache<int, int> = LruCache::new(2);
cache.insert(1, 10);
cache.insert(2, 20);
assert_opt_eq(cache.get(&1), 10);
assert_opt_eq(cache.get(&2), 20);
assert_eq!(cache.len(), 2);
}
#[test]
fn test_put_update() {
let mut cache: LruCache<String, Vec<u8>> = LruCache::new(1);
cache.insert("1".to_string(), vec![10, 10]);
cache.insert("1".to_string(), vec![10, 19]);
assert_opt_eq(cache.get(&"1".to_string()), vec![10, 19]);
assert_eq!(cache.len(), 1);
}
#[test]
fn test_expire_lru() {
let mut cache: LruCache<String, String> = LruCache::new(2);
cache.insert("foo1".to_string(), "bar1".to_string());
cache.insert("foo2".to_string(), "bar2".to_string());
cache.insert("foo3".to_string(), "bar3".to_string());
assert!(cache.get(&"foo1".to_string()).is_none());
cache.insert("foo2".to_string(), "bar2update".to_string());
cache.insert("foo4".to_string(), "bar4".to_string());
assert!(cache.get(&"foo3".to_string()).is_none());
}
#[test]
fn test_pop() {
let mut cache: LruCache<int, int> = LruCache::new(2);
cache.insert(1, 10);
cache.insert(2, 20);
assert_eq!(cache.len(), 2);
let opt1 = cache.remove(&1);
assert!(opt1.is_some());
assert_eq!(opt1.unwrap(), 10);
assert!(cache.get(&1).is_none());
assert_eq!(cache.len(), 1);
}
#[test]
fn test_change_capacity() {
let mut cache: LruCache<int, int> = LruCache::new(2);
assert_eq!(cache.capacity(), 2);
cache.insert(1, 10);
cache.insert(2, 20);
cache.set_capacity(1);
assert!(cache.get(&1).is_none());
assert_eq!(cache.capacity(), 1);
}
#[test]
fn test_to_string() {
let mut cache: LruCache<int, int> = LruCache::new(3);
cache.insert(1, 10);
cache.insert(2, 20);
cache.insert(3, 30);
assert_eq!(cache.to_string(), "{3: 30, 2: 20, 1: 10}");
cache.insert(2, 22);
assert_eq!(cache.to_string(), "{2: 22, 3: 30, 1: 10}");
cache.insert(6, 60);
assert_eq!(cache.to_string(), "{6: 60, 2: 22, 3: 30}");
cache.get(&3);
assert_eq!(cache.to_string(), "{3: 30, 6: 60, 2: 22}");
cache.set_capacity(2);
assert_eq!(cache.to_string(), "{3: 30, 6: 60}");
}
#[test]
fn test_clear() {
let mut cache: LruCache<int, int> = LruCache::new(2);
cache.insert(1, 10);
cache.insert(2, 20);
cache.clear();
assert!(cache.get(&1).is_none());
assert!(cache.get(&2).is_none());
assert_eq!(cache.to_string(), "{}");
}
}

39
src/libstd/collections/mod.rs
View file

@ -24,8 +24,8 @@
//! Rust's collections can be grouped into four major categories:
//!
//! * Sequences: `Vec`, `RingBuf`, `DList`, `BitV`
//! * Maps: `HashMap`, `BTreeMap`, `TreeMap`, `TrieMap`, `VecMap`, `LruCache`
//! * Sets: `HashSet`, `BTreeSet`, `TreeSet`, `TrieSet`, `BitVSet`, `EnumSet`
//! * Maps: `HashMap`, `BTreeMap`, `VecMap`
//! * Sets: `HashSet`, `BTreeSet`, `BitVSet`
//! * Misc: `BinaryHeap`
//!
//! # When Should You Use Which Collection?
@ -64,16 +64,6 @@
//! * You want to be able to get all of the entries in order on-demand.
//! * You want a sorted map.
//!
//! ### Use a `TreeMap` when:
//! * You want a `BTreeMap`, but can't tolerate inconsistent performance.
//! * You want a `BTreeMap`, but have *very large* keys or values.
//! * You want a `BTreeMap`, but have keys that are expensive to compare.
//! * You want a `BTreeMap`, but you accept arbitrary untrusted inputs.
//!
//! ### Use a `TrieMap` when:
//! * You want a `HashMap`, but with many potentially large `uint` keys.
//! * You want a `BTreeMap`, but with potentially large `uint` keys.
//!
//! ### Use a `VecMap` when:
//! * You want a `HashMap` but with known to be small `uint` keys.
//! * You want a `BTreeMap`, but with known to be small `uint` keys.
@ -90,18 +80,11 @@
//! ### Use a `BitVSet` when:
//! * You want a `VecSet`.
//!
//! ### Use an `EnumSet` when:
//! * You want a C-like enum, stored in a single `uint`.
//!
//! ### Use a `BinaryHeap` when:
//! * You want to store a bunch of elements, but only ever want to process the "biggest"
//! or "most important" one at any given time.
//! * You want a priority queue.
//!
//! ### Use an `LruCache` when:
//! * You want a cache that discards infrequently used items when it becomes full.
//! * You want a least-recently-used cache.
//!
//! # Correct and Efficient Usage of Collections
//!
//! Of course, knowing which collection is the right one for the job doesn't instantly
@ -329,15 +312,21 @@
#![experimental]
pub use core_collections::{BinaryHeap, Bitv, BitvSet, BTreeMap, BTreeSet};
pub use core_collections::{DList, EnumSet, RingBuf};
pub use core_collections::{TreeMap, TreeSet, TrieMap, TrieSet, VecMap};
pub use core_collections::{DList, RingBuf, VecMap};
pub use core_collections::{binary_heap, bitv, bitv_set, btree_map, btree_set, dlist, enum_set};
pub use core_collections::{ring_buf, tree_map, tree_set, trie_map, trie_set, vec_map};
/// Deprecated: Moved to collect-rs: https://github.com/Gankro/collect-rs/
#[deprecated = "Moved to collect-rs: https://github.com/Gankro/collect-rs/"]
pub use core_collections::EnumSet;
pub use core_collections::{binary_heap, bitv, bitv_set, btree_map, btree_set};
pub use core_collections::{dlist, ring_buf, vec_map};
/// Deprecated: Moved to collect-rs: https://github.com/Gankro/collect-rs/
#[deprecated = "Moved to collect-rs: https://github.com/Gankro/collect-rs/"]
pub use core_collections::enum_set;
pub use self::hash_map::HashMap;
pub use self::hash_set::HashSet;
pub use self::lru_cache::LruCache;
mod hash;
@ -350,5 +339,3 @@ pub mod hash_set {
//! A hashset
pub use super::hash::set::*;
}
pub mod lru_cache;