| <!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `/root/.cargo/registry/src/github.com-1ecc6299db9ec823/indexmap-1.9.3/src/map.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>map.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../normalize.css"><link rel="stylesheet" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../ayu.css" disabled><link rel="stylesheet" href="../../dark.css" disabled><link rel="stylesheet" href="../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../storage.js"></script><script defer src="../../source-script.js"></script><script defer src="../../source-files.js"></script><script defer src="../../main.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../indexmap/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../indexmap/index.html"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
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| <span id="1947">1947</span> |
| </pre><pre class="rust"><code><span class="doccomment">//! `IndexMap` is a hash table where the iteration order of the key-value |
| //! pairs is independent of the hash values of the keys. |
| |
| </span><span class="kw">mod </span>core; |
| |
| <span class="kw">pub use </span><span class="kw">crate</span>::mutable_keys::MutableKeys; |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"rayon"</span>)] |
| </span><span class="kw">pub use </span><span class="kw">crate</span>::rayon::map <span class="kw">as </span>rayon; |
| |
| <span class="kw">use </span><span class="kw">crate</span>::vec::{<span class="self">self</span>, Vec}; |
| <span class="kw">use </span>::core::cmp::Ordering; |
| <span class="kw">use </span>::core::fmt; |
| <span class="kw">use </span>::core::hash::{BuildHasher, Hash, Hasher}; |
| <span class="kw">use </span>::core::iter::FusedIterator; |
| <span class="kw">use </span>::core::ops::{Index, IndexMut, RangeBounds}; |
| <span class="kw">use </span>::core::slice::{Iter <span class="kw">as </span>SliceIter, IterMut <span class="kw">as </span>SliceIterMut}; |
| |
| <span class="attribute">#[cfg(has_std)] |
| </span><span class="kw">use </span>std::collections::hash_map::RandomState; |
| |
| <span class="kw">use </span><span class="self">self</span>::core::IndexMapCore; |
| <span class="kw">use </span><span class="kw">crate</span>::equivalent::Equivalent; |
| <span class="kw">use </span><span class="kw">crate</span>::util::third; |
| <span class="kw">use crate</span>::{Bucket, Entries, HashValue}; |
| |
| <span class="kw">pub use </span><span class="self">self</span>::core::{Entry, OccupiedEntry, VacantEntry}; |
| |
| <span class="doccomment">/// A hash table where the iteration order of the key-value pairs is independent |
| /// of the hash values of the keys. |
| /// |
| /// The interface is closely compatible with the standard `HashMap`, but also |
| /// has additional features. |
| /// |
| /// # Order |
| /// |
| /// The key-value pairs have a consistent order that is determined by |
| /// the sequence of insertion and removal calls on the map. The order does |
| /// not depend on the keys or the hash function at all. |
| /// |
| /// All iterators traverse the map in *the order*. |
| /// |
| /// The insertion order is preserved, with **notable exceptions** like the |
| /// `.remove()` or `.swap_remove()` methods. Methods such as `.sort_by()` of |
| /// course result in a new order, depending on the sorting order. |
| /// |
| /// # Indices |
| /// |
| /// The key-value pairs are indexed in a compact range without holes in the |
| /// range `0..self.len()`. For example, the method `.get_full` looks up the |
| /// index for a key, and the method `.get_index` looks up the key-value pair by |
| /// index. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use indexmap::IndexMap; |
| /// |
| /// // count the frequency of each letter in a sentence. |
| /// let mut letters = IndexMap::new(); |
| /// for ch in "a short treatise on fungi".chars() { |
| /// *letters.entry(ch).or_insert(0) += 1; |
| /// } |
| /// |
| /// assert_eq!(letters[&'s'], 2); |
| /// assert_eq!(letters[&'t'], 3); |
| /// assert_eq!(letters[&'u'], 1); |
| /// assert_eq!(letters.get(&'y'), None); |
| /// ``` |
| </span><span class="attribute">#[cfg(has_std)] |
| </span><span class="kw">pub struct </span>IndexMap<K, V, S = RandomState> { |
| <span class="kw">pub</span>(<span class="kw">crate</span>) core: IndexMapCore<K, V>, |
| hash_builder: S, |
| } |
| <span class="attribute">#[cfg(not(has_std))] |
| </span><span class="kw">pub struct </span>IndexMap<K, V, S> { |
| <span class="kw">pub</span>(<span class="kw">crate</span>) core: IndexMapCore<K, V>, |
| hash_builder: S, |
| } |
| |
| <span class="kw">impl</span><K, V, S> Clone <span class="kw">for </span>IndexMap<K, V, S> |
| <span class="kw">where |
| </span>K: Clone, |
| V: Clone, |
| S: Clone, |
| { |
| <span class="kw">fn </span>clone(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="self">Self </span>{ |
| IndexMap { |
| core: <span class="self">self</span>.core.clone(), |
| hash_builder: <span class="self">self</span>.hash_builder.clone(), |
| } |
| } |
| |
| <span class="kw">fn </span>clone_from(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span><span class="self">Self</span>) { |
| <span class="self">self</span>.core.clone_from(<span class="kw-2">&</span>other.core); |
| <span class="self">self</span>.hash_builder.clone_from(<span class="kw-2">&</span>other.hash_builder); |
| } |
| } |
| |
| <span class="kw">impl</span><K, V, S> Entries <span class="kw">for </span>IndexMap<K, V, S> { |
| <span class="kw">type </span>Entry = Bucket<K, V>; |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>into_entries(<span class="self">self</span>) -> Vec<<span class="self">Self</span>::Entry> { |
| <span class="self">self</span>.core.into_entries() |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>as_entries(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>[<span class="self">Self</span>::Entry] { |
| <span class="self">self</span>.core.as_entries() |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>as_entries_mut(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="kw-2">&mut </span>[<span class="self">Self</span>::Entry] { |
| <span class="self">self</span>.core.as_entries_mut() |
| } |
| |
| <span class="kw">fn </span>with_entries<F>(<span class="kw-2">&mut </span><span class="self">self</span>, f: F) |
| <span class="kw">where |
| </span>F: FnOnce(<span class="kw-2">&mut </span>[<span class="self">Self</span>::Entry]), |
| { |
| <span class="self">self</span>.core.with_entries(f); |
| } |
| } |
| |
| <span class="kw">impl</span><K, V, S> fmt::Debug <span class="kw">for </span>IndexMap<K, V, S> |
| <span class="kw">where |
| </span>K: fmt::Debug, |
| V: fmt::Debug, |
| { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter<<span class="lifetime">'_</span>>) -> fmt::Result { |
| <span class="kw">if </span><span class="macro">cfg!</span>(not(feature = <span class="string">"test_debug"</span>)) { |
| f.debug_map().entries(<span class="self">self</span>.iter()).finish() |
| } <span class="kw">else </span>{ |
| <span class="comment">// Let the inner `IndexMapCore` print all of its details |
| </span>f.debug_struct(<span class="string">"IndexMap"</span>) |
| .field(<span class="string">"core"</span>, <span class="kw-2">&</span><span class="self">self</span>.core) |
| .finish() |
| } |
| } |
| } |
| |
| <span class="attribute">#[cfg(has_std)] |
| </span><span class="kw">impl</span><K, V> IndexMap<K, V> { |
| <span class="doccomment">/// Create a new map. (Does not allocate.) |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>new() -> <span class="self">Self </span>{ |
| <span class="self">Self</span>::with_capacity(<span class="number">0</span>) |
| } |
| |
| <span class="doccomment">/// Create a new map with capacity for `n` key-value pairs. (Does not |
| /// allocate if `n` is zero.) |
| /// |
| /// Computes in **O(n)** time. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>with_capacity(n: usize) -> <span class="self">Self </span>{ |
| <span class="self">Self</span>::with_capacity_and_hasher(n, <<span class="kw">_</span>>::default()) |
| } |
| } |
| |
| <span class="kw">impl</span><K, V, S> IndexMap<K, V, S> { |
| <span class="doccomment">/// Create a new map with capacity for `n` key-value pairs. (Does not |
| /// allocate if `n` is zero.) |
| /// |
| /// Computes in **O(n)** time. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>with_capacity_and_hasher(n: usize, hash_builder: S) -> <span class="self">Self </span>{ |
| <span class="kw">if </span>n == <span class="number">0 </span>{ |
| <span class="self">Self</span>::with_hasher(hash_builder) |
| } <span class="kw">else </span>{ |
| IndexMap { |
| core: IndexMapCore::with_capacity(n), |
| hash_builder, |
| } |
| } |
| } |
| |
| <span class="doccomment">/// Create a new map with `hash_builder`. |
| /// |
| /// This function is `const`, so it |
| /// can be called in `static` contexts. |
| </span><span class="kw">pub const fn </span>with_hasher(hash_builder: S) -> <span class="self">Self </span>{ |
| IndexMap { |
| core: IndexMapCore::new(), |
| hash_builder, |
| } |
| } |
| |
| <span class="doccomment">/// Computes in **O(1)** time. |
| </span><span class="kw">pub fn </span>capacity(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="self">self</span>.core.capacity() |
| } |
| |
| <span class="doccomment">/// Return a reference to the map's `BuildHasher`. |
| </span><span class="kw">pub fn </span>hasher(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>S { |
| <span class="kw-2">&</span><span class="self">self</span>.hash_builder |
| } |
| |
| <span class="doccomment">/// Return the number of key-value pairs in the map. |
| /// |
| /// Computes in **O(1)** time. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>len(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="self">self</span>.core.len() |
| } |
| |
| <span class="doccomment">/// Returns true if the map contains no elements. |
| /// |
| /// Computes in **O(1)** time. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>is_empty(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="self">self</span>.len() == <span class="number">0 |
| </span>} |
| |
| <span class="doccomment">/// Return an iterator over the key-value pairs of the map, in their order |
| </span><span class="kw">pub fn </span>iter(<span class="kw-2">&</span><span class="self">self</span>) -> Iter<<span class="lifetime">'_</span>, K, V> { |
| Iter { |
| iter: <span class="self">self</span>.as_entries().iter(), |
| } |
| } |
| |
| <span class="doccomment">/// Return an iterator over the key-value pairs of the map, in their order |
| </span><span class="kw">pub fn </span>iter_mut(<span class="kw-2">&mut </span><span class="self">self</span>) -> IterMut<<span class="lifetime">'_</span>, K, V> { |
| IterMut { |
| iter: <span class="self">self</span>.as_entries_mut().iter_mut(), |
| } |
| } |
| |
| <span class="doccomment">/// Return an iterator over the keys of the map, in their order |
| </span><span class="kw">pub fn </span>keys(<span class="kw-2">&</span><span class="self">self</span>) -> Keys<<span class="lifetime">'_</span>, K, V> { |
| Keys { |
| iter: <span class="self">self</span>.as_entries().iter(), |
| } |
| } |
| |
| <span class="doccomment">/// Return an owning iterator over the keys of the map, in their order |
| </span><span class="kw">pub fn </span>into_keys(<span class="self">self</span>) -> IntoKeys<K, V> { |
| IntoKeys { |
| iter: <span class="self">self</span>.into_entries().into_iter(), |
| } |
| } |
| |
| <span class="doccomment">/// Return an iterator over the values of the map, in their order |
| </span><span class="kw">pub fn </span>values(<span class="kw-2">&</span><span class="self">self</span>) -> Values<<span class="lifetime">'_</span>, K, V> { |
| Values { |
| iter: <span class="self">self</span>.as_entries().iter(), |
| } |
| } |
| |
| <span class="doccomment">/// Return an iterator over mutable references to the values of the map, |
| /// in their order |
| </span><span class="kw">pub fn </span>values_mut(<span class="kw-2">&mut </span><span class="self">self</span>) -> ValuesMut<<span class="lifetime">'_</span>, K, V> { |
| ValuesMut { |
| iter: <span class="self">self</span>.as_entries_mut().iter_mut(), |
| } |
| } |
| |
| <span class="doccomment">/// Return an owning iterator over the values of the map, in their order |
| </span><span class="kw">pub fn </span>into_values(<span class="self">self</span>) -> IntoValues<K, V> { |
| IntoValues { |
| iter: <span class="self">self</span>.into_entries().into_iter(), |
| } |
| } |
| |
| <span class="doccomment">/// Remove all key-value pairs in the map, while preserving its capacity. |
| /// |
| /// Computes in **O(n)** time. |
| </span><span class="kw">pub fn </span>clear(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="self">self</span>.core.clear(); |
| } |
| |
| <span class="doccomment">/// Shortens the map, keeping the first `len` elements and dropping the rest. |
| /// |
| /// If `len` is greater than the map's current length, this has no effect. |
| </span><span class="kw">pub fn </span>truncate(<span class="kw-2">&mut </span><span class="self">self</span>, len: usize) { |
| <span class="self">self</span>.core.truncate(len); |
| } |
| |
| <span class="doccomment">/// Clears the `IndexMap` in the given index range, returning those |
| /// key-value pairs as a drain iterator. |
| /// |
| /// The range may be any type that implements `RangeBounds<usize>`, |
| /// including all of the `std::ops::Range*` types, or even a tuple pair of |
| /// `Bound` start and end values. To drain the map entirely, use `RangeFull` |
| /// like `map.drain(..)`. |
| /// |
| /// This shifts down all entries following the drained range to fill the |
| /// gap, and keeps the allocated memory for reuse. |
| /// |
| /// ***Panics*** if the starting point is greater than the end point or if |
| /// the end point is greater than the length of the map. |
| </span><span class="kw">pub fn </span>drain<R>(<span class="kw-2">&mut </span><span class="self">self</span>, range: R) -> Drain<<span class="lifetime">'_</span>, K, V> |
| <span class="kw">where |
| </span>R: RangeBounds<usize>, |
| { |
| Drain { |
| iter: <span class="self">self</span>.core.drain(range), |
| } |
| } |
| |
| <span class="doccomment">/// Splits the collection into two at the given index. |
| /// |
| /// Returns a newly allocated map containing the elements in the range |
| /// `[at, len)`. After the call, the original map will be left containing |
| /// the elements `[0, at)` with its previous capacity unchanged. |
| /// |
| /// ***Panics*** if `at > len`. |
| </span><span class="kw">pub fn </span>split_off(<span class="kw-2">&mut </span><span class="self">self</span>, at: usize) -> <span class="self">Self |
| </span><span class="kw">where |
| </span>S: Clone, |
| { |
| <span class="self">Self </span>{ |
| core: <span class="self">self</span>.core.split_off(at), |
| hash_builder: <span class="self">self</span>.hash_builder.clone(), |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><K, V, S> IndexMap<K, V, S> |
| <span class="kw">where |
| </span>K: Hash + Eq, |
| S: BuildHasher, |
| { |
| <span class="doccomment">/// Reserve capacity for `additional` more key-value pairs. |
| /// |
| /// Computes in **O(n)** time. |
| </span><span class="kw">pub fn </span>reserve(<span class="kw-2">&mut </span><span class="self">self</span>, additional: usize) { |
| <span class="self">self</span>.core.reserve(additional); |
| } |
| |
| <span class="doccomment">/// Shrink the capacity of the map as much as possible. |
| /// |
| /// Computes in **O(n)** time. |
| </span><span class="kw">pub fn </span>shrink_to_fit(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="self">self</span>.core.shrink_to(<span class="number">0</span>); |
| } |
| |
| <span class="doccomment">/// Shrink the capacity of the map with a lower limit. |
| /// |
| /// Computes in **O(n)** time. |
| </span><span class="kw">pub fn </span>shrink_to(<span class="kw-2">&mut </span><span class="self">self</span>, min_capacity: usize) { |
| <span class="self">self</span>.core.shrink_to(min_capacity); |
| } |
| |
| <span class="kw">fn </span>hash<Q: <span class="question-mark">?</span>Sized + Hash>(<span class="kw-2">&</span><span class="self">self</span>, key: <span class="kw-2">&</span>Q) -> HashValue { |
| <span class="kw">let </span><span class="kw-2">mut </span>h = <span class="self">self</span>.hash_builder.build_hasher(); |
| key.hash(<span class="kw-2">&mut </span>h); |
| HashValue(h.finish() <span class="kw">as </span>usize) |
| } |
| |
| <span class="doccomment">/// Insert a key-value pair in the map. |
| /// |
| /// If an equivalent key already exists in the map: the key remains and |
| /// retains in its place in the order, its corresponding value is updated |
| /// with `value` and the older value is returned inside `Some(_)`. |
| /// |
| /// If no equivalent key existed in the map: the new key-value pair is |
| /// inserted, last in order, and `None` is returned. |
| /// |
| /// Computes in **O(1)** time (amortized average). |
| /// |
| /// See also [`entry`](#method.entry) if you you want to insert *or* modify |
| /// or if you need to get the index of the corresponding key-value pair. |
| </span><span class="kw">pub fn </span>insert(<span class="kw-2">&mut </span><span class="self">self</span>, key: K, value: V) -> <span class="prelude-ty">Option</span><V> { |
| <span class="self">self</span>.insert_full(key, value).<span class="number">1 |
| </span>} |
| |
| <span class="doccomment">/// Insert a key-value pair in the map, and get their index. |
| /// |
| /// If an equivalent key already exists in the map: the key remains and |
| /// retains in its place in the order, its corresponding value is updated |
| /// with `value` and the older value is returned inside `(index, Some(_))`. |
| /// |
| /// If no equivalent key existed in the map: the new key-value pair is |
| /// inserted, last in order, and `(index, None)` is returned. |
| /// |
| /// Computes in **O(1)** time (amortized average). |
| /// |
| /// See also [`entry`](#method.entry) if you you want to insert *or* modify |
| /// or if you need to get the index of the corresponding key-value pair. |
| </span><span class="kw">pub fn </span>insert_full(<span class="kw-2">&mut </span><span class="self">self</span>, key: K, value: V) -> (usize, <span class="prelude-ty">Option</span><V>) { |
| <span class="kw">let </span>hash = <span class="self">self</span>.hash(<span class="kw-2">&</span>key); |
| <span class="self">self</span>.core.insert_full(hash, key, value) |
| } |
| |
| <span class="doccomment">/// Get the given key’s corresponding entry in the map for insertion and/or |
| /// in-place manipulation. |
| /// |
| /// Computes in **O(1)** time (amortized average). |
| </span><span class="kw">pub fn </span>entry(<span class="kw-2">&mut </span><span class="self">self</span>, key: K) -> Entry<<span class="lifetime">'_</span>, K, V> { |
| <span class="kw">let </span>hash = <span class="self">self</span>.hash(<span class="kw-2">&</span>key); |
| <span class="self">self</span>.core.entry(hash, key) |
| } |
| |
| <span class="doccomment">/// Return `true` if an equivalent to `key` exists in the map. |
| /// |
| /// Computes in **O(1)** time (average). |
| </span><span class="kw">pub fn </span>contains_key<Q: <span class="question-mark">?</span>Sized>(<span class="kw-2">&</span><span class="self">self</span>, key: <span class="kw-2">&</span>Q) -> bool |
| <span class="kw">where |
| </span>Q: Hash + Equivalent<K>, |
| { |
| <span class="self">self</span>.get_index_of(key).is_some() |
| } |
| |
| <span class="doccomment">/// Return a reference to the value stored for `key`, if it is present, |
| /// else `None`. |
| /// |
| /// Computes in **O(1)** time (average). |
| </span><span class="kw">pub fn </span>get<Q: <span class="question-mark">?</span>Sized>(<span class="kw-2">&</span><span class="self">self</span>, key: <span class="kw-2">&</span>Q) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span>V> |
| <span class="kw">where |
| </span>Q: Hash + Equivalent<K>, |
| { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(i) = <span class="self">self</span>.get_index_of(key) { |
| <span class="kw">let </span>entry = <span class="kw-2">&</span><span class="self">self</span>.as_entries()[i]; |
| <span class="prelude-val">Some</span>(<span class="kw-2">&</span>entry.value) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">None |
| </span>} |
| } |
| |
| <span class="doccomment">/// Return references to the key-value pair stored for `key`, |
| /// if it is present, else `None`. |
| /// |
| /// Computes in **O(1)** time (average). |
| </span><span class="kw">pub fn </span>get_key_value<Q: <span class="question-mark">?</span>Sized>(<span class="kw-2">&</span><span class="self">self</span>, key: <span class="kw-2">&</span>Q) -> <span class="prelude-ty">Option</span><(<span class="kw-2">&</span>K, <span class="kw-2">&</span>V)> |
| <span class="kw">where |
| </span>Q: Hash + Equivalent<K>, |
| { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(i) = <span class="self">self</span>.get_index_of(key) { |
| <span class="kw">let </span>entry = <span class="kw-2">&</span><span class="self">self</span>.as_entries()[i]; |
| <span class="prelude-val">Some</span>((<span class="kw-2">&</span>entry.key, <span class="kw-2">&</span>entry.value)) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">None |
| </span>} |
| } |
| |
| <span class="doccomment">/// Return item index, key and value |
| </span><span class="kw">pub fn </span>get_full<Q: <span class="question-mark">?</span>Sized>(<span class="kw-2">&</span><span class="self">self</span>, key: <span class="kw-2">&</span>Q) -> <span class="prelude-ty">Option</span><(usize, <span class="kw-2">&</span>K, <span class="kw-2">&</span>V)> |
| <span class="kw">where |
| </span>Q: Hash + Equivalent<K>, |
| { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(i) = <span class="self">self</span>.get_index_of(key) { |
| <span class="kw">let </span>entry = <span class="kw-2">&</span><span class="self">self</span>.as_entries()[i]; |
| <span class="prelude-val">Some</span>((i, <span class="kw-2">&</span>entry.key, <span class="kw-2">&</span>entry.value)) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">None |
| </span>} |
| } |
| |
| <span class="doccomment">/// Return item index, if it exists in the map |
| /// |
| /// Computes in **O(1)** time (average). |
| </span><span class="kw">pub fn </span>get_index_of<Q: <span class="question-mark">?</span>Sized>(<span class="kw-2">&</span><span class="self">self</span>, key: <span class="kw-2">&</span>Q) -> <span class="prelude-ty">Option</span><usize> |
| <span class="kw">where |
| </span>Q: Hash + Equivalent<K>, |
| { |
| <span class="kw">if </span><span class="self">self</span>.is_empty() { |
| <span class="prelude-val">None |
| </span>} <span class="kw">else </span>{ |
| <span class="kw">let </span>hash = <span class="self">self</span>.hash(key); |
| <span class="self">self</span>.core.get_index_of(hash, key) |
| } |
| } |
| |
| <span class="kw">pub fn </span>get_mut<Q: <span class="question-mark">?</span>Sized>(<span class="kw-2">&mut </span><span class="self">self</span>, key: <span class="kw-2">&</span>Q) -> <span class="prelude-ty">Option</span><<span class="kw-2">&mut </span>V> |
| <span class="kw">where |
| </span>Q: Hash + Equivalent<K>, |
| { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(i) = <span class="self">self</span>.get_index_of(key) { |
| <span class="kw">let </span>entry = <span class="kw-2">&mut </span><span class="self">self</span>.as_entries_mut()[i]; |
| <span class="prelude-val">Some</span>(<span class="kw-2">&mut </span>entry.value) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">None |
| </span>} |
| } |
| |
| <span class="kw">pub fn </span>get_full_mut<Q: <span class="question-mark">?</span>Sized>(<span class="kw-2">&mut </span><span class="self">self</span>, key: <span class="kw-2">&</span>Q) -> <span class="prelude-ty">Option</span><(usize, <span class="kw-2">&</span>K, <span class="kw-2">&mut </span>V)> |
| <span class="kw">where |
| </span>Q: Hash + Equivalent<K>, |
| { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(i) = <span class="self">self</span>.get_index_of(key) { |
| <span class="kw">let </span>entry = <span class="kw-2">&mut </span><span class="self">self</span>.as_entries_mut()[i]; |
| <span class="prelude-val">Some</span>((i, <span class="kw-2">&</span>entry.key, <span class="kw-2">&mut </span>entry.value)) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">None |
| </span>} |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>get_full_mut2_impl<Q: <span class="question-mark">?</span>Sized>( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| key: <span class="kw-2">&</span>Q, |
| ) -> <span class="prelude-ty">Option</span><(usize, <span class="kw-2">&mut </span>K, <span class="kw-2">&mut </span>V)> |
| <span class="kw">where |
| </span>Q: Hash + Equivalent<K>, |
| { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(i) = <span class="self">self</span>.get_index_of(key) { |
| <span class="kw">let </span>entry = <span class="kw-2">&mut </span><span class="self">self</span>.as_entries_mut()[i]; |
| <span class="prelude-val">Some</span>((i, <span class="kw-2">&mut </span>entry.key, <span class="kw-2">&mut </span>entry.value)) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">None |
| </span>} |
| } |
| |
| <span class="doccomment">/// Remove the key-value pair equivalent to `key` and return |
| /// its value. |
| /// |
| /// **NOTE:** This is equivalent to `.swap_remove(key)`, if you need to |
| /// preserve the order of the keys in the map, use `.shift_remove(key)` |
| /// instead. |
| /// |
| /// Computes in **O(1)** time (average). |
| </span><span class="kw">pub fn </span>remove<Q: <span class="question-mark">?</span>Sized>(<span class="kw-2">&mut </span><span class="self">self</span>, key: <span class="kw-2">&</span>Q) -> <span class="prelude-ty">Option</span><V> |
| <span class="kw">where |
| </span>Q: Hash + Equivalent<K>, |
| { |
| <span class="self">self</span>.swap_remove(key) |
| } |
| |
| <span class="doccomment">/// Remove and return the key-value pair equivalent to `key`. |
| /// |
| /// **NOTE:** This is equivalent to `.swap_remove_entry(key)`, if you need to |
| /// preserve the order of the keys in the map, use `.shift_remove_entry(key)` |
| /// instead. |
| /// |
| /// Computes in **O(1)** time (average). |
| </span><span class="kw">pub fn </span>remove_entry<Q: <span class="question-mark">?</span>Sized>(<span class="kw-2">&mut </span><span class="self">self</span>, key: <span class="kw-2">&</span>Q) -> <span class="prelude-ty">Option</span><(K, V)> |
| <span class="kw">where |
| </span>Q: Hash + Equivalent<K>, |
| { |
| <span class="self">self</span>.swap_remove_entry(key) |
| } |
| |
| <span class="doccomment">/// Remove the key-value pair equivalent to `key` and return |
| /// its value. |
| /// |
| /// Like `Vec::swap_remove`, the pair is removed by swapping it with the |
| /// last element of the map and popping it off. **This perturbs |
| /// the position of what used to be the last element!** |
| /// |
| /// Return `None` if `key` is not in map. |
| /// |
| /// Computes in **O(1)** time (average). |
| </span><span class="kw">pub fn </span>swap_remove<Q: <span class="question-mark">?</span>Sized>(<span class="kw-2">&mut </span><span class="self">self</span>, key: <span class="kw-2">&</span>Q) -> <span class="prelude-ty">Option</span><V> |
| <span class="kw">where |
| </span>Q: Hash + Equivalent<K>, |
| { |
| <span class="self">self</span>.swap_remove_full(key).map(third) |
| } |
| |
| <span class="doccomment">/// Remove and return the key-value pair equivalent to `key`. |
| /// |
| /// Like `Vec::swap_remove`, the pair is removed by swapping it with the |
| /// last element of the map and popping it off. **This perturbs |
| /// the position of what used to be the last element!** |
| /// |
| /// Return `None` if `key` is not in map. |
| /// |
| /// Computes in **O(1)** time (average). |
| </span><span class="kw">pub fn </span>swap_remove_entry<Q: <span class="question-mark">?</span>Sized>(<span class="kw-2">&mut </span><span class="self">self</span>, key: <span class="kw-2">&</span>Q) -> <span class="prelude-ty">Option</span><(K, V)> |
| <span class="kw">where |
| </span>Q: Hash + Equivalent<K>, |
| { |
| <span class="kw">match </span><span class="self">self</span>.swap_remove_full(key) { |
| <span class="prelude-val">Some</span>((<span class="kw">_</span>, key, value)) => <span class="prelude-val">Some</span>((key, value)), |
| <span class="prelude-val">None </span>=> <span class="prelude-val">None</span>, |
| } |
| } |
| |
| <span class="doccomment">/// Remove the key-value pair equivalent to `key` and return it and |
| /// the index it had. |
| /// |
| /// Like `Vec::swap_remove`, the pair is removed by swapping it with the |
| /// last element of the map and popping it off. **This perturbs |
| /// the position of what used to be the last element!** |
| /// |
| /// Return `None` if `key` is not in map. |
| /// |
| /// Computes in **O(1)** time (average). |
| </span><span class="kw">pub fn </span>swap_remove_full<Q: <span class="question-mark">?</span>Sized>(<span class="kw-2">&mut </span><span class="self">self</span>, key: <span class="kw-2">&</span>Q) -> <span class="prelude-ty">Option</span><(usize, K, V)> |
| <span class="kw">where |
| </span>Q: Hash + Equivalent<K>, |
| { |
| <span class="kw">if </span><span class="self">self</span>.is_empty() { |
| <span class="kw">return </span><span class="prelude-val">None</span>; |
| } |
| <span class="kw">let </span>hash = <span class="self">self</span>.hash(key); |
| <span class="self">self</span>.core.swap_remove_full(hash, key) |
| } |
| |
| <span class="doccomment">/// Remove the key-value pair equivalent to `key` and return |
| /// its value. |
| /// |
| /// Like `Vec::remove`, the pair is removed by shifting all of the |
| /// elements that follow it, preserving their relative order. |
| /// **This perturbs the index of all of those elements!** |
| /// |
| /// Return `None` if `key` is not in map. |
| /// |
| /// Computes in **O(n)** time (average). |
| </span><span class="kw">pub fn </span>shift_remove<Q: <span class="question-mark">?</span>Sized>(<span class="kw-2">&mut </span><span class="self">self</span>, key: <span class="kw-2">&</span>Q) -> <span class="prelude-ty">Option</span><V> |
| <span class="kw">where |
| </span>Q: Hash + Equivalent<K>, |
| { |
| <span class="self">self</span>.shift_remove_full(key).map(third) |
| } |
| |
| <span class="doccomment">/// Remove and return the key-value pair equivalent to `key`. |
| /// |
| /// Like `Vec::remove`, the pair is removed by shifting all of the |
| /// elements that follow it, preserving their relative order. |
| /// **This perturbs the index of all of those elements!** |
| /// |
| /// Return `None` if `key` is not in map. |
| /// |
| /// Computes in **O(n)** time (average). |
| </span><span class="kw">pub fn </span>shift_remove_entry<Q: <span class="question-mark">?</span>Sized>(<span class="kw-2">&mut </span><span class="self">self</span>, key: <span class="kw-2">&</span>Q) -> <span class="prelude-ty">Option</span><(K, V)> |
| <span class="kw">where |
| </span>Q: Hash + Equivalent<K>, |
| { |
| <span class="kw">match </span><span class="self">self</span>.shift_remove_full(key) { |
| <span class="prelude-val">Some</span>((<span class="kw">_</span>, key, value)) => <span class="prelude-val">Some</span>((key, value)), |
| <span class="prelude-val">None </span>=> <span class="prelude-val">None</span>, |
| } |
| } |
| |
| <span class="doccomment">/// Remove the key-value pair equivalent to `key` and return it and |
| /// the index it had. |
| /// |
| /// Like `Vec::remove`, the pair is removed by shifting all of the |
| /// elements that follow it, preserving their relative order. |
| /// **This perturbs the index of all of those elements!** |
| /// |
| /// Return `None` if `key` is not in map. |
| /// |
| /// Computes in **O(n)** time (average). |
| </span><span class="kw">pub fn </span>shift_remove_full<Q: <span class="question-mark">?</span>Sized>(<span class="kw-2">&mut </span><span class="self">self</span>, key: <span class="kw-2">&</span>Q) -> <span class="prelude-ty">Option</span><(usize, K, V)> |
| <span class="kw">where |
| </span>Q: Hash + Equivalent<K>, |
| { |
| <span class="kw">if </span><span class="self">self</span>.is_empty() { |
| <span class="kw">return </span><span class="prelude-val">None</span>; |
| } |
| <span class="kw">let </span>hash = <span class="self">self</span>.hash(key); |
| <span class="self">self</span>.core.shift_remove_full(hash, key) |
| } |
| |
| <span class="doccomment">/// Remove the last key-value pair |
| /// |
| /// This preserves the order of the remaining elements. |
| /// |
| /// Computes in **O(1)** time (average). |
| </span><span class="kw">pub fn </span>pop(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><(K, V)> { |
| <span class="self">self</span>.core.pop() |
| } |
| |
| <span class="doccomment">/// Scan through each key-value pair in the map and keep those where the |
| /// closure `keep` returns `true`. |
| /// |
| /// The elements are visited in order, and remaining elements keep their |
| /// order. |
| /// |
| /// Computes in **O(n)** time (average). |
| </span><span class="kw">pub fn </span>retain<F>(<span class="kw-2">&mut </span><span class="self">self</span>, <span class="kw-2">mut </span>keep: F) |
| <span class="kw">where |
| </span>F: FnMut(<span class="kw-2">&</span>K, <span class="kw-2">&mut </span>V) -> bool, |
| { |
| <span class="self">self</span>.core.retain_in_order(<span class="kw">move </span>|k, v| keep(k, v)); |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>retain_mut<F>(<span class="kw-2">&mut </span><span class="self">self</span>, keep: F) |
| <span class="kw">where |
| </span>F: FnMut(<span class="kw-2">&mut </span>K, <span class="kw-2">&mut </span>V) -> bool, |
| { |
| <span class="self">self</span>.core.retain_in_order(keep); |
| } |
| |
| <span class="doccomment">/// Sort the map’s key-value pairs by the default ordering of the keys. |
| /// |
| /// See [`sort_by`](Self::sort_by) for details. |
| </span><span class="kw">pub fn </span>sort_keys(<span class="kw-2">&mut </span><span class="self">self</span>) |
| <span class="kw">where |
| </span>K: Ord, |
| { |
| <span class="self">self</span>.with_entries(<span class="kw">move </span>|entries| { |
| entries.sort_by(<span class="kw">move </span>|a, b| K::cmp(<span class="kw-2">&</span>a.key, <span class="kw-2">&</span>b.key)); |
| }); |
| } |
| |
| <span class="doccomment">/// Sort the map’s key-value pairs in place using the comparison |
| /// function `cmp`. |
| /// |
| /// The comparison function receives two key and value pairs to compare (you |
| /// can sort by keys or values or their combination as needed). |
| /// |
| /// Computes in **O(n log n + c)** time and **O(n)** space where *n* is |
| /// the length of the map and *c* the capacity. The sort is stable. |
| </span><span class="kw">pub fn </span>sort_by<F>(<span class="kw-2">&mut </span><span class="self">self</span>, <span class="kw-2">mut </span>cmp: F) |
| <span class="kw">where |
| </span>F: FnMut(<span class="kw-2">&</span>K, <span class="kw-2">&</span>V, <span class="kw-2">&</span>K, <span class="kw-2">&</span>V) -> Ordering, |
| { |
| <span class="self">self</span>.with_entries(<span class="kw">move </span>|entries| { |
| entries.sort_by(<span class="kw">move </span>|a, b| cmp(<span class="kw-2">&</span>a.key, <span class="kw-2">&</span>a.value, <span class="kw-2">&</span>b.key, <span class="kw-2">&</span>b.value)); |
| }); |
| } |
| |
| <span class="doccomment">/// Sort the key-value pairs of the map and return a by-value iterator of |
| /// the key-value pairs with the result. |
| /// |
| /// The sort is stable. |
| </span><span class="kw">pub fn </span>sorted_by<F>(<span class="self">self</span>, <span class="kw-2">mut </span>cmp: F) -> IntoIter<K, V> |
| <span class="kw">where |
| </span>F: FnMut(<span class="kw-2">&</span>K, <span class="kw-2">&</span>V, <span class="kw-2">&</span>K, <span class="kw-2">&</span>V) -> Ordering, |
| { |
| <span class="kw">let </span><span class="kw-2">mut </span>entries = <span class="self">self</span>.into_entries(); |
| entries.sort_by(<span class="kw">move </span>|a, b| cmp(<span class="kw-2">&</span>a.key, <span class="kw-2">&</span>a.value, <span class="kw-2">&</span>b.key, <span class="kw-2">&</span>b.value)); |
| IntoIter { |
| iter: entries.into_iter(), |
| } |
| } |
| |
| <span class="doccomment">/// Sort the map's key-value pairs by the default ordering of the keys, but |
| /// may not preserve the order of equal elements. |
| /// |
| /// See [`sort_unstable_by`](Self::sort_unstable_by) for details. |
| </span><span class="kw">pub fn </span>sort_unstable_keys(<span class="kw-2">&mut </span><span class="self">self</span>) |
| <span class="kw">where |
| </span>K: Ord, |
| { |
| <span class="self">self</span>.with_entries(<span class="kw">move </span>|entries| { |
| entries.sort_unstable_by(<span class="kw">move </span>|a, b| K::cmp(<span class="kw-2">&</span>a.key, <span class="kw-2">&</span>b.key)); |
| }); |
| } |
| |
| <span class="doccomment">/// Sort the map's key-value pairs in place using the comparison function `cmp`, but |
| /// may not preserve the order of equal elements. |
| /// |
| /// The comparison function receives two key and value pairs to compare (you |
| /// can sort by keys or values or their combination as needed). |
| /// |
| /// Computes in **O(n log n + c)** time where *n* is |
| /// the length of the map and *c* is the capacity. The sort is unstable. |
| </span><span class="kw">pub fn </span>sort_unstable_by<F>(<span class="kw-2">&mut </span><span class="self">self</span>, <span class="kw-2">mut </span>cmp: F) |
| <span class="kw">where |
| </span>F: FnMut(<span class="kw-2">&</span>K, <span class="kw-2">&</span>V, <span class="kw-2">&</span>K, <span class="kw-2">&</span>V) -> Ordering, |
| { |
| <span class="self">self</span>.with_entries(<span class="kw">move </span>|entries| { |
| entries.sort_unstable_by(<span class="kw">move </span>|a, b| cmp(<span class="kw-2">&</span>a.key, <span class="kw-2">&</span>a.value, <span class="kw-2">&</span>b.key, <span class="kw-2">&</span>b.value)); |
| }); |
| } |
| |
| <span class="doccomment">/// Sort the key-value pairs of the map and return a by-value iterator of |
| /// the key-value pairs with the result. |
| /// |
| /// The sort is unstable. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>sorted_unstable_by<F>(<span class="self">self</span>, <span class="kw-2">mut </span>cmp: F) -> IntoIter<K, V> |
| <span class="kw">where |
| </span>F: FnMut(<span class="kw-2">&</span>K, <span class="kw-2">&</span>V, <span class="kw-2">&</span>K, <span class="kw-2">&</span>V) -> Ordering, |
| { |
| <span class="kw">let </span><span class="kw-2">mut </span>entries = <span class="self">self</span>.into_entries(); |
| entries.sort_unstable_by(<span class="kw">move </span>|a, b| cmp(<span class="kw-2">&</span>a.key, <span class="kw-2">&</span>a.value, <span class="kw-2">&</span>b.key, <span class="kw-2">&</span>b.value)); |
| IntoIter { |
| iter: entries.into_iter(), |
| } |
| } |
| |
| <span class="doccomment">/// Reverses the order of the map’s key-value pairs in place. |
| /// |
| /// Computes in **O(n)** time and **O(1)** space. |
| </span><span class="kw">pub fn </span>reverse(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="self">self</span>.core.reverse() |
| } |
| } |
| |
| <span class="kw">impl</span><K, V, S> IndexMap<K, V, S> { |
| <span class="doccomment">/// Get a key-value pair by index |
| /// |
| /// Valid indices are *0 <= index < self.len()* |
| /// |
| /// Computes in **O(1)** time. |
| </span><span class="kw">pub fn </span>get_index(<span class="kw-2">&</span><span class="self">self</span>, index: usize) -> <span class="prelude-ty">Option</span><(<span class="kw-2">&</span>K, <span class="kw-2">&</span>V)> { |
| <span class="self">self</span>.as_entries().get(index).map(Bucket::refs) |
| } |
| |
| <span class="doccomment">/// Get a key-value pair by index |
| /// |
| /// Valid indices are *0 <= index < self.len()* |
| /// |
| /// Computes in **O(1)** time. |
| </span><span class="kw">pub fn </span>get_index_mut(<span class="kw-2">&mut </span><span class="self">self</span>, index: usize) -> <span class="prelude-ty">Option</span><(<span class="kw-2">&mut </span>K, <span class="kw-2">&mut </span>V)> { |
| <span class="self">self</span>.as_entries_mut().get_mut(index).map(Bucket::muts) |
| } |
| |
| <span class="doccomment">/// Get the first key-value pair |
| /// |
| /// Computes in **O(1)** time. |
| </span><span class="kw">pub fn </span>first(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><(<span class="kw-2">&</span>K, <span class="kw-2">&</span>V)> { |
| <span class="self">self</span>.as_entries().first().map(Bucket::refs) |
| } |
| |
| <span class="doccomment">/// Get the first key-value pair, with mutable access to the value |
| /// |
| /// Computes in **O(1)** time. |
| </span><span class="kw">pub fn </span>first_mut(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><(<span class="kw-2">&</span>K, <span class="kw-2">&mut </span>V)> { |
| <span class="self">self</span>.as_entries_mut().first_mut().map(Bucket::ref_mut) |
| } |
| |
| <span class="doccomment">/// Get the last key-value pair |
| /// |
| /// Computes in **O(1)** time. |
| </span><span class="kw">pub fn </span>last(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><(<span class="kw-2">&</span>K, <span class="kw-2">&</span>V)> { |
| <span class="self">self</span>.as_entries().last().map(Bucket::refs) |
| } |
| |
| <span class="doccomment">/// Get the last key-value pair, with mutable access to the value |
| /// |
| /// Computes in **O(1)** time. |
| </span><span class="kw">pub fn </span>last_mut(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><(<span class="kw-2">&</span>K, <span class="kw-2">&mut </span>V)> { |
| <span class="self">self</span>.as_entries_mut().last_mut().map(Bucket::ref_mut) |
| } |
| |
| <span class="doccomment">/// Remove the key-value pair by index |
| /// |
| /// Valid indices are *0 <= index < self.len()* |
| /// |
| /// Like `Vec::swap_remove`, the pair is removed by swapping it with the |
| /// last element of the map and popping it off. **This perturbs |
| /// the position of what used to be the last element!** |
| /// |
| /// Computes in **O(1)** time (average). |
| </span><span class="kw">pub fn </span>swap_remove_index(<span class="kw-2">&mut </span><span class="self">self</span>, index: usize) -> <span class="prelude-ty">Option</span><(K, V)> { |
| <span class="self">self</span>.core.swap_remove_index(index) |
| } |
| |
| <span class="doccomment">/// Remove the key-value pair by index |
| /// |
| /// Valid indices are *0 <= index < self.len()* |
| /// |
| /// Like `Vec::remove`, the pair is removed by shifting all of the |
| /// elements that follow it, preserving their relative order. |
| /// **This perturbs the index of all of those elements!** |
| /// |
| /// Computes in **O(n)** time (average). |
| </span><span class="kw">pub fn </span>shift_remove_index(<span class="kw-2">&mut </span><span class="self">self</span>, index: usize) -> <span class="prelude-ty">Option</span><(K, V)> { |
| <span class="self">self</span>.core.shift_remove_index(index) |
| } |
| |
| <span class="doccomment">/// Moves the position of a key-value pair from one index to another |
| /// by shifting all other pairs in-between. |
| /// |
| /// * If `from < to`, the other pairs will shift down while the targeted pair moves up. |
| /// * If `from > to`, the other pairs will shift up while the targeted pair moves down. |
| /// |
| /// ***Panics*** if `from` or `to` are out of bounds. |
| /// |
| /// Computes in **O(n)** time (average). |
| </span><span class="kw">pub fn </span>move_index(<span class="kw-2">&mut </span><span class="self">self</span>, from: usize, to: usize) { |
| <span class="self">self</span>.core.move_index(from, to) |
| } |
| |
| <span class="doccomment">/// Swaps the position of two key-value pairs in the map. |
| /// |
| /// ***Panics*** if `a` or `b` are out of bounds. |
| </span><span class="kw">pub fn </span>swap_indices(<span class="kw-2">&mut </span><span class="self">self</span>, a: usize, b: usize) { |
| <span class="self">self</span>.core.swap_indices(a, b) |
| } |
| } |
| |
| <span class="doccomment">/// An iterator over the keys of a `IndexMap`. |
| /// |
| /// This `struct` is created by the [`keys`] method on [`IndexMap`]. See its |
| /// documentation for more. |
| /// |
| /// [`keys`]: struct.IndexMap.html#method.keys |
| /// [`IndexMap`]: struct.IndexMap.html |
| </span><span class="kw">pub struct </span>Keys<<span class="lifetime">'a</span>, K, V> { |
| iter: SliceIter<<span class="lifetime">'a</span>, Bucket<K, V>>, |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>, K, V> Iterator <span class="kw">for </span>Keys<<span class="lifetime">'a</span>, K, V> { |
| <span class="kw">type </span>Item = <span class="kw-2">&</span><span class="lifetime">'a </span>K; |
| |
| <span class="macro">iterator_methods!</span>(Bucket::key_ref); |
| } |
| |
| <span class="kw">impl</span><K, V> DoubleEndedIterator <span class="kw">for </span>Keys<<span class="lifetime">'_</span>, K, V> { |
| <span class="macro">double_ended_iterator_methods!</span>(Bucket::key_ref); |
| } |
| |
| <span class="kw">impl</span><K, V> ExactSizeIterator <span class="kw">for </span>Keys<<span class="lifetime">'_</span>, K, V> { |
| <span class="kw">fn </span>len(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="self">self</span>.iter.len() |
| } |
| } |
| |
| <span class="kw">impl</span><K, V> FusedIterator <span class="kw">for </span>Keys<<span class="lifetime">'_</span>, K, V> {} |
| |
| <span class="comment">// FIXME(#26925) Remove in favor of `#[derive(Clone)]` |
| </span><span class="kw">impl</span><K, V> Clone <span class="kw">for </span>Keys<<span class="lifetime">'_</span>, K, V> { |
| <span class="kw">fn </span>clone(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="self">Self </span>{ |
| Keys { |
| iter: <span class="self">self</span>.iter.clone(), |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><K: fmt::Debug, V> fmt::Debug <span class="kw">for </span>Keys<<span class="lifetime">'_</span>, K, V> { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter<<span class="lifetime">'_</span>>) -> fmt::Result { |
| f.debug_list().entries(<span class="self">self</span>.clone()).finish() |
| } |
| } |
| |
| <span class="doccomment">/// An owning iterator over the keys of a `IndexMap`. |
| /// |
| /// This `struct` is created by the [`into_keys`] method on [`IndexMap`]. |
| /// See its documentation for more. |
| /// |
| /// [`IndexMap`]: struct.IndexMap.html |
| /// [`into_keys`]: struct.IndexMap.html#method.into_keys |
| </span><span class="kw">pub struct </span>IntoKeys<K, V> { |
| iter: vec::IntoIter<Bucket<K, V>>, |
| } |
| |
| <span class="kw">impl</span><K, V> Iterator <span class="kw">for </span>IntoKeys<K, V> { |
| <span class="kw">type </span>Item = K; |
| |
| <span class="macro">iterator_methods!</span>(Bucket::key); |
| } |
| |
| <span class="kw">impl</span><K, V> DoubleEndedIterator <span class="kw">for </span>IntoKeys<K, V> { |
| <span class="macro">double_ended_iterator_methods!</span>(Bucket::key); |
| } |
| |
| <span class="kw">impl</span><K, V> ExactSizeIterator <span class="kw">for </span>IntoKeys<K, V> { |
| <span class="kw">fn </span>len(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="self">self</span>.iter.len() |
| } |
| } |
| |
| <span class="kw">impl</span><K, V> FusedIterator <span class="kw">for </span>IntoKeys<K, V> {} |
| |
| <span class="kw">impl</span><K: fmt::Debug, V> fmt::Debug <span class="kw">for </span>IntoKeys<K, V> { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter<<span class="lifetime">'_</span>>) -> fmt::Result { |
| <span class="kw">let </span>iter = <span class="self">self</span>.iter.as_slice().iter().map(Bucket::key_ref); |
| f.debug_list().entries(iter).finish() |
| } |
| } |
| |
| <span class="doccomment">/// An iterator over the values of a `IndexMap`. |
| /// |
| /// This `struct` is created by the [`values`] method on [`IndexMap`]. See its |
| /// documentation for more. |
| /// |
| /// [`values`]: struct.IndexMap.html#method.values |
| /// [`IndexMap`]: struct.IndexMap.html |
| </span><span class="kw">pub struct </span>Values<<span class="lifetime">'a</span>, K, V> { |
| iter: SliceIter<<span class="lifetime">'a</span>, Bucket<K, V>>, |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>, K, V> Iterator <span class="kw">for </span>Values<<span class="lifetime">'a</span>, K, V> { |
| <span class="kw">type </span>Item = <span class="kw-2">&</span><span class="lifetime">'a </span>V; |
| |
| <span class="macro">iterator_methods!</span>(Bucket::value_ref); |
| } |
| |
| <span class="kw">impl</span><K, V> DoubleEndedIterator <span class="kw">for </span>Values<<span class="lifetime">'_</span>, K, V> { |
| <span class="macro">double_ended_iterator_methods!</span>(Bucket::value_ref); |
| } |
| |
| <span class="kw">impl</span><K, V> ExactSizeIterator <span class="kw">for </span>Values<<span class="lifetime">'_</span>, K, V> { |
| <span class="kw">fn </span>len(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="self">self</span>.iter.len() |
| } |
| } |
| |
| <span class="kw">impl</span><K, V> FusedIterator <span class="kw">for </span>Values<<span class="lifetime">'_</span>, K, V> {} |
| |
| <span class="comment">// FIXME(#26925) Remove in favor of `#[derive(Clone)]` |
| </span><span class="kw">impl</span><K, V> Clone <span class="kw">for </span>Values<<span class="lifetime">'_</span>, K, V> { |
| <span class="kw">fn </span>clone(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="self">Self </span>{ |
| Values { |
| iter: <span class="self">self</span>.iter.clone(), |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><K, V: fmt::Debug> fmt::Debug <span class="kw">for </span>Values<<span class="lifetime">'_</span>, K, V> { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter<<span class="lifetime">'_</span>>) -> fmt::Result { |
| f.debug_list().entries(<span class="self">self</span>.clone()).finish() |
| } |
| } |
| |
| <span class="doccomment">/// A mutable iterator over the values of a `IndexMap`. |
| /// |
| /// This `struct` is created by the [`values_mut`] method on [`IndexMap`]. See its |
| /// documentation for more. |
| /// |
| /// [`values_mut`]: struct.IndexMap.html#method.values_mut |
| /// [`IndexMap`]: struct.IndexMap.html |
| </span><span class="kw">pub struct </span>ValuesMut<<span class="lifetime">'a</span>, K, V> { |
| iter: SliceIterMut<<span class="lifetime">'a</span>, Bucket<K, V>>, |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>, K, V> Iterator <span class="kw">for </span>ValuesMut<<span class="lifetime">'a</span>, K, V> { |
| <span class="kw">type </span>Item = <span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>V; |
| |
| <span class="macro">iterator_methods!</span>(Bucket::value_mut); |
| } |
| |
| <span class="kw">impl</span><K, V> DoubleEndedIterator <span class="kw">for </span>ValuesMut<<span class="lifetime">'_</span>, K, V> { |
| <span class="macro">double_ended_iterator_methods!</span>(Bucket::value_mut); |
| } |
| |
| <span class="kw">impl</span><K, V> ExactSizeIterator <span class="kw">for </span>ValuesMut<<span class="lifetime">'_</span>, K, V> { |
| <span class="kw">fn </span>len(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="self">self</span>.iter.len() |
| } |
| } |
| |
| <span class="kw">impl</span><K, V> FusedIterator <span class="kw">for </span>ValuesMut<<span class="lifetime">'_</span>, K, V> {} |
| |
| <span class="kw">impl</span><K, V: fmt::Debug> fmt::Debug <span class="kw">for </span>ValuesMut<<span class="lifetime">'_</span>, K, V> { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter<<span class="lifetime">'_</span>>) -> fmt::Result { |
| <span class="kw">let </span>iter = <span class="self">self</span>.iter.as_slice().iter().map(Bucket::value_ref); |
| f.debug_list().entries(iter).finish() |
| } |
| } |
| |
| <span class="doccomment">/// An owning iterator over the values of a `IndexMap`. |
| /// |
| /// This `struct` is created by the [`into_values`] method on [`IndexMap`]. |
| /// See its documentation for more. |
| /// |
| /// [`IndexMap`]: struct.IndexMap.html |
| /// [`into_values`]: struct.IndexMap.html#method.into_values |
| </span><span class="kw">pub struct </span>IntoValues<K, V> { |
| iter: vec::IntoIter<Bucket<K, V>>, |
| } |
| |
| <span class="kw">impl</span><K, V> Iterator <span class="kw">for </span>IntoValues<K, V> { |
| <span class="kw">type </span>Item = V; |
| |
| <span class="macro">iterator_methods!</span>(Bucket::value); |
| } |
| |
| <span class="kw">impl</span><K, V> DoubleEndedIterator <span class="kw">for </span>IntoValues<K, V> { |
| <span class="macro">double_ended_iterator_methods!</span>(Bucket::value); |
| } |
| |
| <span class="kw">impl</span><K, V> ExactSizeIterator <span class="kw">for </span>IntoValues<K, V> { |
| <span class="kw">fn </span>len(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="self">self</span>.iter.len() |
| } |
| } |
| |
| <span class="kw">impl</span><K, V> FusedIterator <span class="kw">for </span>IntoValues<K, V> {} |
| |
| <span class="kw">impl</span><K, V: fmt::Debug> fmt::Debug <span class="kw">for </span>IntoValues<K, V> { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter<<span class="lifetime">'_</span>>) -> fmt::Result { |
| <span class="kw">let </span>iter = <span class="self">self</span>.iter.as_slice().iter().map(Bucket::value_ref); |
| f.debug_list().entries(iter).finish() |
| } |
| } |
| |
| <span class="doccomment">/// An iterator over the entries of a `IndexMap`. |
| /// |
| /// This `struct` is created by the [`iter`] method on [`IndexMap`]. See its |
| /// documentation for more. |
| /// |
| /// [`iter`]: struct.IndexMap.html#method.iter |
| /// [`IndexMap`]: struct.IndexMap.html |
| </span><span class="kw">pub struct </span>Iter<<span class="lifetime">'a</span>, K, V> { |
| iter: SliceIter<<span class="lifetime">'a</span>, Bucket<K, V>>, |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>, K, V> Iterator <span class="kw">for </span>Iter<<span class="lifetime">'a</span>, K, V> { |
| <span class="kw">type </span>Item = (<span class="kw-2">&</span><span class="lifetime">'a </span>K, <span class="kw-2">&</span><span class="lifetime">'a </span>V); |
| |
| <span class="macro">iterator_methods!</span>(Bucket::refs); |
| } |
| |
| <span class="kw">impl</span><K, V> DoubleEndedIterator <span class="kw">for </span>Iter<<span class="lifetime">'_</span>, K, V> { |
| <span class="macro">double_ended_iterator_methods!</span>(Bucket::refs); |
| } |
| |
| <span class="kw">impl</span><K, V> ExactSizeIterator <span class="kw">for </span>Iter<<span class="lifetime">'_</span>, K, V> { |
| <span class="kw">fn </span>len(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="self">self</span>.iter.len() |
| } |
| } |
| |
| <span class="kw">impl</span><K, V> FusedIterator <span class="kw">for </span>Iter<<span class="lifetime">'_</span>, K, V> {} |
| |
| <span class="comment">// FIXME(#26925) Remove in favor of `#[derive(Clone)]` |
| </span><span class="kw">impl</span><K, V> Clone <span class="kw">for </span>Iter<<span class="lifetime">'_</span>, K, V> { |
| <span class="kw">fn </span>clone(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="self">Self </span>{ |
| Iter { |
| iter: <span class="self">self</span>.iter.clone(), |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><K: fmt::Debug, V: fmt::Debug> fmt::Debug <span class="kw">for </span>Iter<<span class="lifetime">'_</span>, K, V> { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter<<span class="lifetime">'_</span>>) -> fmt::Result { |
| f.debug_list().entries(<span class="self">self</span>.clone()).finish() |
| } |
| } |
| |
| <span class="doccomment">/// A mutable iterator over the entries of a `IndexMap`. |
| /// |
| /// This `struct` is created by the [`iter_mut`] method on [`IndexMap`]. See its |
| /// documentation for more. |
| /// |
| /// [`iter_mut`]: struct.IndexMap.html#method.iter_mut |
| /// [`IndexMap`]: struct.IndexMap.html |
| </span><span class="kw">pub struct </span>IterMut<<span class="lifetime">'a</span>, K, V> { |
| iter: SliceIterMut<<span class="lifetime">'a</span>, Bucket<K, V>>, |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>, K, V> Iterator <span class="kw">for </span>IterMut<<span class="lifetime">'a</span>, K, V> { |
| <span class="kw">type </span>Item = (<span class="kw-2">&</span><span class="lifetime">'a </span>K, <span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>V); |
| |
| <span class="macro">iterator_methods!</span>(Bucket::ref_mut); |
| } |
| |
| <span class="kw">impl</span><K, V> DoubleEndedIterator <span class="kw">for </span>IterMut<<span class="lifetime">'_</span>, K, V> { |
| <span class="macro">double_ended_iterator_methods!</span>(Bucket::ref_mut); |
| } |
| |
| <span class="kw">impl</span><K, V> ExactSizeIterator <span class="kw">for </span>IterMut<<span class="lifetime">'_</span>, K, V> { |
| <span class="kw">fn </span>len(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="self">self</span>.iter.len() |
| } |
| } |
| |
| <span class="kw">impl</span><K, V> FusedIterator <span class="kw">for </span>IterMut<<span class="lifetime">'_</span>, K, V> {} |
| |
| <span class="kw">impl</span><K: fmt::Debug, V: fmt::Debug> fmt::Debug <span class="kw">for </span>IterMut<<span class="lifetime">'_</span>, K, V> { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter<<span class="lifetime">'_</span>>) -> fmt::Result { |
| <span class="kw">let </span>iter = <span class="self">self</span>.iter.as_slice().iter().map(Bucket::refs); |
| f.debug_list().entries(iter).finish() |
| } |
| } |
| |
| <span class="doccomment">/// An owning iterator over the entries of a `IndexMap`. |
| /// |
| /// This `struct` is created by the [`into_iter`] method on [`IndexMap`] |
| /// (provided by the `IntoIterator` trait). See its documentation for more. |
| /// |
| /// [`into_iter`]: struct.IndexMap.html#method.into_iter |
| /// [`IndexMap`]: struct.IndexMap.html |
| </span><span class="kw">pub struct </span>IntoIter<K, V> { |
| iter: vec::IntoIter<Bucket<K, V>>, |
| } |
| |
| <span class="kw">impl</span><K, V> Iterator <span class="kw">for </span>IntoIter<K, V> { |
| <span class="kw">type </span>Item = (K, V); |
| |
| <span class="macro">iterator_methods!</span>(Bucket::key_value); |
| } |
| |
| <span class="kw">impl</span><K, V> DoubleEndedIterator <span class="kw">for </span>IntoIter<K, V> { |
| <span class="macro">double_ended_iterator_methods!</span>(Bucket::key_value); |
| } |
| |
| <span class="kw">impl</span><K, V> ExactSizeIterator <span class="kw">for </span>IntoIter<K, V> { |
| <span class="kw">fn </span>len(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="self">self</span>.iter.len() |
| } |
| } |
| |
| <span class="kw">impl</span><K, V> FusedIterator <span class="kw">for </span>IntoIter<K, V> {} |
| |
| <span class="kw">impl</span><K: fmt::Debug, V: fmt::Debug> fmt::Debug <span class="kw">for </span>IntoIter<K, V> { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter<<span class="lifetime">'_</span>>) -> fmt::Result { |
| <span class="kw">let </span>iter = <span class="self">self</span>.iter.as_slice().iter().map(Bucket::refs); |
| f.debug_list().entries(iter).finish() |
| } |
| } |
| |
| <span class="doccomment">/// A draining iterator over the entries of a `IndexMap`. |
| /// |
| /// This `struct` is created by the [`drain`] method on [`IndexMap`]. See its |
| /// documentation for more. |
| /// |
| /// [`drain`]: struct.IndexMap.html#method.drain |
| /// [`IndexMap`]: struct.IndexMap.html |
| </span><span class="kw">pub struct </span>Drain<<span class="lifetime">'a</span>, K, V> { |
| <span class="kw">pub</span>(<span class="kw">crate</span>) iter: vec::Drain<<span class="lifetime">'a</span>, Bucket<K, V>>, |
| } |
| |
| <span class="kw">impl</span><K, V> Iterator <span class="kw">for </span>Drain<<span class="lifetime">'_</span>, K, V> { |
| <span class="kw">type </span>Item = (K, V); |
| |
| <span class="macro">iterator_methods!</span>(Bucket::key_value); |
| } |
| |
| <span class="kw">impl</span><K, V> DoubleEndedIterator <span class="kw">for </span>Drain<<span class="lifetime">'_</span>, K, V> { |
| <span class="macro">double_ended_iterator_methods!</span>(Bucket::key_value); |
| } |
| |
| <span class="kw">impl</span><K, V> ExactSizeIterator <span class="kw">for </span>Drain<<span class="lifetime">'_</span>, K, V> { |
| <span class="kw">fn </span>len(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="self">self</span>.iter.len() |
| } |
| } |
| |
| <span class="kw">impl</span><K, V> FusedIterator <span class="kw">for </span>Drain<<span class="lifetime">'_</span>, K, V> {} |
| |
| <span class="kw">impl</span><K: fmt::Debug, V: fmt::Debug> fmt::Debug <span class="kw">for </span>Drain<<span class="lifetime">'_</span>, K, V> { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter<<span class="lifetime">'_</span>>) -> fmt::Result { |
| <span class="kw">let </span>iter = <span class="self">self</span>.iter.as_slice().iter().map(Bucket::refs); |
| f.debug_list().entries(iter).finish() |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>, K, V, S> IntoIterator <span class="kw">for </span><span class="kw-2">&</span><span class="lifetime">'a </span>IndexMap<K, V, S> { |
| <span class="kw">type </span>Item = (<span class="kw-2">&</span><span class="lifetime">'a </span>K, <span class="kw-2">&</span><span class="lifetime">'a </span>V); |
| <span class="kw">type </span>IntoIter = Iter<<span class="lifetime">'a</span>, K, V>; |
| <span class="kw">fn </span>into_iter(<span class="self">self</span>) -> <span class="self">Self</span>::IntoIter { |
| <span class="self">self</span>.iter() |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>, K, V, S> IntoIterator <span class="kw">for </span><span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>IndexMap<K, V, S> { |
| <span class="kw">type </span>Item = (<span class="kw-2">&</span><span class="lifetime">'a </span>K, <span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>V); |
| <span class="kw">type </span>IntoIter = IterMut<<span class="lifetime">'a</span>, K, V>; |
| <span class="kw">fn </span>into_iter(<span class="self">self</span>) -> <span class="self">Self</span>::IntoIter { |
| <span class="self">self</span>.iter_mut() |
| } |
| } |
| |
| <span class="kw">impl</span><K, V, S> IntoIterator <span class="kw">for </span>IndexMap<K, V, S> { |
| <span class="kw">type </span>Item = (K, V); |
| <span class="kw">type </span>IntoIter = IntoIter<K, V>; |
| <span class="kw">fn </span>into_iter(<span class="self">self</span>) -> <span class="self">Self</span>::IntoIter { |
| IntoIter { |
| iter: <span class="self">self</span>.into_entries().into_iter(), |
| } |
| } |
| } |
| |
| <span class="doccomment">/// Access `IndexMap` values corresponding to a key. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use indexmap::IndexMap; |
| /// |
| /// let mut map = IndexMap::new(); |
| /// for word in "Lorem ipsum dolor sit amet".split_whitespace() { |
| /// map.insert(word.to_lowercase(), word.to_uppercase()); |
| /// } |
| /// assert_eq!(map["lorem"], "LOREM"); |
| /// assert_eq!(map["ipsum"], "IPSUM"); |
| /// ``` |
| /// |
| /// ```should_panic |
| /// use indexmap::IndexMap; |
| /// |
| /// let mut map = IndexMap::new(); |
| /// map.insert("foo", 1); |
| /// println!("{:?}", map["bar"]); // panics! |
| /// ``` |
| </span><span class="kw">impl</span><K, V, Q: <span class="question-mark">?</span>Sized, S> Index<<span class="kw-2">&</span>Q> <span class="kw">for </span>IndexMap<K, V, S> |
| <span class="kw">where |
| </span>Q: Hash + Equivalent<K>, |
| K: Hash + Eq, |
| S: BuildHasher, |
| { |
| <span class="kw">type </span>Output = V; |
| |
| <span class="doccomment">/// Returns a reference to the value corresponding to the supplied `key`. |
| /// |
| /// ***Panics*** if `key` is not present in the map. |
| </span><span class="kw">fn </span>index(<span class="kw-2">&</span><span class="self">self</span>, key: <span class="kw-2">&</span>Q) -> <span class="kw-2">&</span>V { |
| <span class="self">self</span>.get(key).expect(<span class="string">"IndexMap: key not found"</span>) |
| } |
| } |
| |
| <span class="doccomment">/// Access `IndexMap` values corresponding to a key. |
| /// |
| /// Mutable indexing allows changing / updating values of key-value |
| /// pairs that are already present. |
| /// |
| /// You can **not** insert new pairs with index syntax, use `.insert()`. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use indexmap::IndexMap; |
| /// |
| /// let mut map = IndexMap::new(); |
| /// for word in "Lorem ipsum dolor sit amet".split_whitespace() { |
| /// map.insert(word.to_lowercase(), word.to_string()); |
| /// } |
| /// let lorem = &mut map["lorem"]; |
| /// assert_eq!(lorem, "Lorem"); |
| /// lorem.retain(char::is_lowercase); |
| /// assert_eq!(map["lorem"], "orem"); |
| /// ``` |
| /// |
| /// ```should_panic |
| /// use indexmap::IndexMap; |
| /// |
| /// let mut map = IndexMap::new(); |
| /// map.insert("foo", 1); |
| /// map["bar"] = 1; // panics! |
| /// ``` |
| </span><span class="kw">impl</span><K, V, Q: <span class="question-mark">?</span>Sized, S> IndexMut<<span class="kw-2">&</span>Q> <span class="kw">for </span>IndexMap<K, V, S> |
| <span class="kw">where |
| </span>Q: Hash + Equivalent<K>, |
| K: Hash + Eq, |
| S: BuildHasher, |
| { |
| <span class="doccomment">/// Returns a mutable reference to the value corresponding to the supplied `key`. |
| /// |
| /// ***Panics*** if `key` is not present in the map. |
| </span><span class="kw">fn </span>index_mut(<span class="kw-2">&mut </span><span class="self">self</span>, key: <span class="kw-2">&</span>Q) -> <span class="kw-2">&mut </span>V { |
| <span class="self">self</span>.get_mut(key).expect(<span class="string">"IndexMap: key not found"</span>) |
| } |
| } |
| |
| <span class="doccomment">/// Access `IndexMap` values at indexed positions. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use indexmap::IndexMap; |
| /// |
| /// let mut map = IndexMap::new(); |
| /// for word in "Lorem ipsum dolor sit amet".split_whitespace() { |
| /// map.insert(word.to_lowercase(), word.to_uppercase()); |
| /// } |
| /// assert_eq!(map[0], "LOREM"); |
| /// assert_eq!(map[1], "IPSUM"); |
| /// map.reverse(); |
| /// assert_eq!(map[0], "AMET"); |
| /// assert_eq!(map[1], "SIT"); |
| /// map.sort_keys(); |
| /// assert_eq!(map[0], "AMET"); |
| /// assert_eq!(map[1], "DOLOR"); |
| /// ``` |
| /// |
| /// ```should_panic |
| /// use indexmap::IndexMap; |
| /// |
| /// let mut map = IndexMap::new(); |
| /// map.insert("foo", 1); |
| /// println!("{:?}", map[10]); // panics! |
| /// ``` |
| </span><span class="kw">impl</span><K, V, S> Index<usize> <span class="kw">for </span>IndexMap<K, V, S> { |
| <span class="kw">type </span>Output = V; |
| |
| <span class="doccomment">/// Returns a reference to the value at the supplied `index`. |
| /// |
| /// ***Panics*** if `index` is out of bounds. |
| </span><span class="kw">fn </span>index(<span class="kw-2">&</span><span class="self">self</span>, index: usize) -> <span class="kw-2">&</span>V { |
| <span class="self">self</span>.get_index(index) |
| .expect(<span class="string">"IndexMap: index out of bounds"</span>) |
| .<span class="number">1 |
| </span>} |
| } |
| |
| <span class="doccomment">/// Access `IndexMap` values at indexed positions. |
| /// |
| /// Mutable indexing allows changing / updating indexed values |
| /// that are already present. |
| /// |
| /// You can **not** insert new values with index syntax, use `.insert()`. |
| /// |
| /// # Examples |
| /// |
| /// ``` |
| /// use indexmap::IndexMap; |
| /// |
| /// let mut map = IndexMap::new(); |
| /// for word in "Lorem ipsum dolor sit amet".split_whitespace() { |
| /// map.insert(word.to_lowercase(), word.to_string()); |
| /// } |
| /// let lorem = &mut map[0]; |
| /// assert_eq!(lorem, "Lorem"); |
| /// lorem.retain(char::is_lowercase); |
| /// assert_eq!(map["lorem"], "orem"); |
| /// ``` |
| /// |
| /// ```should_panic |
| /// use indexmap::IndexMap; |
| /// |
| /// let mut map = IndexMap::new(); |
| /// map.insert("foo", 1); |
| /// map[10] = 1; // panics! |
| /// ``` |
| </span><span class="kw">impl</span><K, V, S> IndexMut<usize> <span class="kw">for </span>IndexMap<K, V, S> { |
| <span class="doccomment">/// Returns a mutable reference to the value at the supplied `index`. |
| /// |
| /// ***Panics*** if `index` is out of bounds. |
| </span><span class="kw">fn </span>index_mut(<span class="kw-2">&mut </span><span class="self">self</span>, index: usize) -> <span class="kw-2">&mut </span>V { |
| <span class="self">self</span>.get_index_mut(index) |
| .expect(<span class="string">"IndexMap: index out of bounds"</span>) |
| .<span class="number">1 |
| </span>} |
| } |
| |
| <span class="kw">impl</span><K, V, S> FromIterator<(K, V)> <span class="kw">for </span>IndexMap<K, V, S> |
| <span class="kw">where |
| </span>K: Hash + Eq, |
| S: BuildHasher + Default, |
| { |
| <span class="doccomment">/// Create an `IndexMap` from the sequence of key-value pairs in the |
| /// iterable. |
| /// |
| /// `from_iter` uses the same logic as `extend`. See |
| /// [`extend`](#method.extend) for more details. |
| </span><span class="kw">fn </span>from_iter<I: IntoIterator<Item = (K, V)>>(iterable: I) -> <span class="self">Self </span>{ |
| <span class="kw">let </span>iter = iterable.into_iter(); |
| <span class="kw">let </span>(low, <span class="kw">_</span>) = iter.size_hint(); |
| <span class="kw">let </span><span class="kw-2">mut </span>map = <span class="self">Self</span>::with_capacity_and_hasher(low, <<span class="kw">_</span>>::default()); |
| map.extend(iter); |
| map |
| } |
| } |
| |
| <span class="attribute">#[cfg(has_std)] |
| </span><span class="kw">impl</span><K, V, <span class="kw">const </span>N: usize> From<[(K, V); N]> <span class="kw">for </span>IndexMap<K, V, RandomState> |
| <span class="kw">where |
| </span>K: Hash + Eq, |
| { |
| <span class="doccomment">/// # Examples |
| /// |
| /// ``` |
| /// use indexmap::IndexMap; |
| /// |
| /// let map1 = IndexMap::from([(1, 2), (3, 4)]); |
| /// let map2: IndexMap<_, _> = [(1, 2), (3, 4)].into(); |
| /// assert_eq!(map1, map2); |
| /// ``` |
| </span><span class="kw">fn </span>from(arr: [(K, V); N]) -> <span class="self">Self </span>{ |
| <span class="self">Self</span>::from_iter(arr) |
| } |
| } |
| |
| <span class="kw">impl</span><K, V, S> Extend<(K, V)> <span class="kw">for </span>IndexMap<K, V, S> |
| <span class="kw">where |
| </span>K: Hash + Eq, |
| S: BuildHasher, |
| { |
| <span class="doccomment">/// Extend the map with all key-value pairs in the iterable. |
| /// |
| /// This is equivalent to calling [`insert`](#method.insert) for each of |
| /// them in order, which means that for keys that already existed |
| /// in the map, their value is updated but it keeps the existing order. |
| /// |
| /// New keys are inserted in the order they appear in the sequence. If |
| /// equivalents of a key occur more than once, the last corresponding value |
| /// prevails. |
| </span><span class="kw">fn </span>extend<I: IntoIterator<Item = (K, V)>>(<span class="kw-2">&mut </span><span class="self">self</span>, iterable: I) { |
| <span class="comment">// (Note: this is a copy of `std`/`hashbrown`'s reservation logic.) |
| // Keys may be already present or show multiple times in the iterator. |
| // Reserve the entire hint lower bound if the map is empty. |
| // Otherwise reserve half the hint (rounded up), so the map |
| // will only resize twice in the worst case. |
| </span><span class="kw">let </span>iter = iterable.into_iter(); |
| <span class="kw">let </span>reserve = <span class="kw">if </span><span class="self">self</span>.is_empty() { |
| iter.size_hint().<span class="number">0 |
| </span>} <span class="kw">else </span>{ |
| (iter.size_hint().<span class="number">0 </span>+ <span class="number">1</span>) / <span class="number">2 |
| </span>}; |
| <span class="self">self</span>.reserve(reserve); |
| iter.for_each(<span class="kw">move </span>|(k, v)| { |
| <span class="self">self</span>.insert(k, v); |
| }); |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>, K, V, S> Extend<(<span class="kw-2">&</span><span class="lifetime">'a </span>K, <span class="kw-2">&</span><span class="lifetime">'a </span>V)> <span class="kw">for </span>IndexMap<K, V, S> |
| <span class="kw">where |
| </span>K: Hash + Eq + Copy, |
| V: Copy, |
| S: BuildHasher, |
| { |
| <span class="doccomment">/// Extend the map with all key-value pairs in the iterable. |
| /// |
| /// See the first extend method for more details. |
| </span><span class="kw">fn </span>extend<I: IntoIterator<Item = (<span class="kw-2">&</span><span class="lifetime">'a </span>K, <span class="kw-2">&</span><span class="lifetime">'a </span>V)>>(<span class="kw-2">&mut </span><span class="self">self</span>, iterable: I) { |
| <span class="self">self</span>.extend(iterable.into_iter().map(|(<span class="kw-2">&</span>key, <span class="kw-2">&</span>value)| (key, value))); |
| } |
| } |
| |
| <span class="kw">impl</span><K, V, S> Default <span class="kw">for </span>IndexMap<K, V, S> |
| <span class="kw">where |
| </span>S: Default, |
| { |
| <span class="doccomment">/// Return an empty `IndexMap` |
| </span><span class="kw">fn </span>default() -> <span class="self">Self </span>{ |
| <span class="self">Self</span>::with_capacity_and_hasher(<span class="number">0</span>, S::default()) |
| } |
| } |
| |
| <span class="kw">impl</span><K, V1, S1, V2, S2> PartialEq<IndexMap<K, V2, S2>> <span class="kw">for </span>IndexMap<K, V1, S1> |
| <span class="kw">where |
| </span>K: Hash + Eq, |
| V1: PartialEq<V2>, |
| S1: BuildHasher, |
| S2: BuildHasher, |
| { |
| <span class="kw">fn </span>eq(<span class="kw-2">&</span><span class="self">self</span>, other: <span class="kw-2">&</span>IndexMap<K, V2, S2>) -> bool { |
| <span class="kw">if </span><span class="self">self</span>.len() != other.len() { |
| <span class="kw">return </span><span class="bool-val">false</span>; |
| } |
| |
| <span class="self">self</span>.iter() |
| .all(|(key, value)| other.get(key).map_or(<span class="bool-val">false</span>, |v| <span class="kw-2">*</span>value == <span class="kw-2">*</span>v)) |
| } |
| } |
| |
| <span class="kw">impl</span><K, V, S> Eq <span class="kw">for </span>IndexMap<K, V, S> |
| <span class="kw">where |
| </span>K: Eq + Hash, |
| V: Eq, |
| S: BuildHasher, |
| { |
| } |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">mod </span>tests { |
| <span class="kw">use super</span>::<span class="kw-2">*</span>; |
| <span class="kw">use </span>std::string::String; |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>it_works() { |
| <span class="kw">let </span><span class="kw-2">mut </span>map = IndexMap::new(); |
| <span class="macro">assert_eq!</span>(map.is_empty(), <span class="bool-val">true</span>); |
| map.insert(<span class="number">1</span>, ()); |
| map.insert(<span class="number">1</span>, ()); |
| <span class="macro">assert_eq!</span>(map.len(), <span class="number">1</span>); |
| <span class="macro">assert!</span>(map.get(<span class="kw-2">&</span><span class="number">1</span>).is_some()); |
| <span class="macro">assert_eq!</span>(map.is_empty(), <span class="bool-val">false</span>); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>new() { |
| <span class="kw">let </span>map = IndexMap::<String, String>::new(); |
| <span class="macro">println!</span>(<span class="string">"{:?}"</span>, map); |
| <span class="macro">assert_eq!</span>(map.capacity(), <span class="number">0</span>); |
| <span class="macro">assert_eq!</span>(map.len(), <span class="number">0</span>); |
| <span class="macro">assert_eq!</span>(map.is_empty(), <span class="bool-val">true</span>); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>insert() { |
| <span class="kw">let </span>insert = [<span class="number">0</span>, <span class="number">4</span>, <span class="number">2</span>, <span class="number">12</span>, <span class="number">8</span>, <span class="number">7</span>, <span class="number">11</span>, <span class="number">5</span>]; |
| <span class="kw">let </span>not_present = [<span class="number">1</span>, <span class="number">3</span>, <span class="number">6</span>, <span class="number">9</span>, <span class="number">10</span>]; |
| <span class="kw">let </span><span class="kw-2">mut </span>map = IndexMap::with_capacity(insert.len()); |
| |
| <span class="kw">for </span>(i, <span class="kw-2">&</span>elt) <span class="kw">in </span>insert.iter().enumerate() { |
| <span class="macro">assert_eq!</span>(map.len(), i); |
| map.insert(elt, elt); |
| <span class="macro">assert_eq!</span>(map.len(), i + <span class="number">1</span>); |
| <span class="macro">assert_eq!</span>(map.get(<span class="kw-2">&</span>elt), <span class="prelude-val">Some</span>(<span class="kw-2">&</span>elt)); |
| <span class="macro">assert_eq!</span>(map[<span class="kw-2">&</span>elt], elt); |
| } |
| <span class="macro">println!</span>(<span class="string">"{:?}"</span>, map); |
| |
| <span class="kw">for </span><span class="kw-2">&</span>elt <span class="kw">in </span><span class="kw-2">&</span>not_present { |
| <span class="macro">assert!</span>(map.get(<span class="kw-2">&</span>elt).is_none()); |
| } |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>insert_full() { |
| <span class="kw">let </span>insert = <span class="macro">vec!</span>[<span class="number">9</span>, <span class="number">2</span>, <span class="number">7</span>, <span class="number">1</span>, <span class="number">4</span>, <span class="number">6</span>, <span class="number">13</span>]; |
| <span class="kw">let </span>present = <span class="macro">vec!</span>[<span class="number">1</span>, <span class="number">6</span>, <span class="number">2</span>]; |
| <span class="kw">let </span><span class="kw-2">mut </span>map = IndexMap::with_capacity(insert.len()); |
| |
| <span class="kw">for </span>(i, <span class="kw-2">&</span>elt) <span class="kw">in </span>insert.iter().enumerate() { |
| <span class="macro">assert_eq!</span>(map.len(), i); |
| <span class="kw">let </span>(index, existing) = map.insert_full(elt, elt); |
| <span class="macro">assert_eq!</span>(existing, <span class="prelude-val">None</span>); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(index), map.get_full(<span class="kw-2">&</span>elt).map(|x| x.<span class="number">0</span>)); |
| <span class="macro">assert_eq!</span>(map.len(), i + <span class="number">1</span>); |
| } |
| |
| <span class="kw">let </span>len = map.len(); |
| <span class="kw">for </span><span class="kw-2">&</span>elt <span class="kw">in </span><span class="kw-2">&</span>present { |
| <span class="kw">let </span>(index, existing) = map.insert_full(elt, elt); |
| <span class="macro">assert_eq!</span>(existing, <span class="prelude-val">Some</span>(elt)); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(index), map.get_full(<span class="kw-2">&</span>elt).map(|x| x.<span class="number">0</span>)); |
| <span class="macro">assert_eq!</span>(map.len(), len); |
| } |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>insert_2() { |
| <span class="kw">let </span><span class="kw-2">mut </span>map = IndexMap::with_capacity(<span class="number">16</span>); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>keys = <span class="macro">vec!</span>[]; |
| keys.extend(<span class="number">0</span>..<span class="number">16</span>); |
| keys.extend(<span class="kw">if </span><span class="macro">cfg!</span>(miri) { <span class="number">32</span>..<span class="number">64 </span>} <span class="kw">else </span>{ <span class="number">128</span>..<span class="number">267 </span>}); |
| |
| <span class="kw">for </span><span class="kw-2">&</span>i <span class="kw">in </span><span class="kw-2">&</span>keys { |
| <span class="kw">let </span>old_map = map.clone(); |
| map.insert(i, ()); |
| <span class="kw">for </span>key <span class="kw">in </span>old_map.keys() { |
| <span class="kw">if </span>map.get(key).is_none() { |
| <span class="macro">println!</span>(<span class="string">"old_map: {:?}"</span>, old_map); |
| <span class="macro">println!</span>(<span class="string">"map: {:?}"</span>, map); |
| <span class="macro">panic!</span>(<span class="string">"did not find {} in map"</span>, key); |
| } |
| } |
| } |
| |
| <span class="kw">for </span><span class="kw-2">&</span>i <span class="kw">in </span><span class="kw-2">&</span>keys { |
| <span class="macro">assert!</span>(map.get(<span class="kw-2">&</span>i).is_some(), <span class="string">"did not find {}"</span>, i); |
| } |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>insert_order() { |
| <span class="kw">let </span>insert = [<span class="number">0</span>, <span class="number">4</span>, <span class="number">2</span>, <span class="number">12</span>, <span class="number">8</span>, <span class="number">7</span>, <span class="number">11</span>, <span class="number">5</span>, <span class="number">3</span>, <span class="number">17</span>, <span class="number">19</span>, <span class="number">22</span>, <span class="number">23</span>]; |
| <span class="kw">let </span><span class="kw-2">mut </span>map = IndexMap::new(); |
| |
| <span class="kw">for </span><span class="kw-2">&</span>elt <span class="kw">in </span><span class="kw-2">&</span>insert { |
| map.insert(elt, ()); |
| } |
| |
| <span class="macro">assert_eq!</span>(map.keys().count(), map.len()); |
| <span class="macro">assert_eq!</span>(map.keys().count(), insert.len()); |
| <span class="kw">for </span>(a, b) <span class="kw">in </span>insert.iter().zip(map.keys()) { |
| <span class="macro">assert_eq!</span>(a, b); |
| } |
| <span class="kw">for </span>(i, k) <span class="kw">in </span>(<span class="number">0</span>..insert.len()).zip(map.keys()) { |
| <span class="macro">assert_eq!</span>(map.get_index(i).unwrap().<span class="number">0</span>, k); |
| } |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>grow() { |
| <span class="kw">let </span>insert = [<span class="number">0</span>, <span class="number">4</span>, <span class="number">2</span>, <span class="number">12</span>, <span class="number">8</span>, <span class="number">7</span>, <span class="number">11</span>]; |
| <span class="kw">let </span>not_present = [<span class="number">1</span>, <span class="number">3</span>, <span class="number">6</span>, <span class="number">9</span>, <span class="number">10</span>]; |
| <span class="kw">let </span><span class="kw-2">mut </span>map = IndexMap::with_capacity(insert.len()); |
| |
| <span class="kw">for </span>(i, <span class="kw-2">&</span>elt) <span class="kw">in </span>insert.iter().enumerate() { |
| <span class="macro">assert_eq!</span>(map.len(), i); |
| map.insert(elt, elt); |
| <span class="macro">assert_eq!</span>(map.len(), i + <span class="number">1</span>); |
| <span class="macro">assert_eq!</span>(map.get(<span class="kw-2">&</span>elt), <span class="prelude-val">Some</span>(<span class="kw-2">&</span>elt)); |
| <span class="macro">assert_eq!</span>(map[<span class="kw-2">&</span>elt], elt); |
| } |
| |
| <span class="macro">println!</span>(<span class="string">"{:?}"</span>, map); |
| <span class="kw">for </span><span class="kw-2">&</span>elt <span class="kw">in </span><span class="kw-2">&</span>insert { |
| map.insert(elt * <span class="number">10</span>, elt); |
| } |
| <span class="kw">for </span><span class="kw-2">&</span>elt <span class="kw">in </span><span class="kw-2">&</span>insert { |
| map.insert(elt * <span class="number">100</span>, elt); |
| } |
| <span class="kw">for </span>(i, <span class="kw-2">&</span>elt) <span class="kw">in </span>insert.iter().cycle().enumerate().take(<span class="number">100</span>) { |
| map.insert(elt * <span class="number">100 </span>+ i <span class="kw">as </span>i32, elt); |
| } |
| <span class="macro">println!</span>(<span class="string">"{:?}"</span>, map); |
| <span class="kw">for </span><span class="kw-2">&</span>elt <span class="kw">in </span><span class="kw-2">&</span>not_present { |
| <span class="macro">assert!</span>(map.get(<span class="kw-2">&</span>elt).is_none()); |
| } |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>reserve() { |
| <span class="kw">let </span><span class="kw-2">mut </span>map = IndexMap::<usize, usize>::new(); |
| <span class="macro">assert_eq!</span>(map.capacity(), <span class="number">0</span>); |
| map.reserve(<span class="number">100</span>); |
| <span class="kw">let </span>capacity = map.capacity(); |
| <span class="macro">assert!</span>(capacity >= <span class="number">100</span>); |
| <span class="kw">for </span>i <span class="kw">in </span><span class="number">0</span>..capacity { |
| <span class="macro">assert_eq!</span>(map.len(), i); |
| map.insert(i, i * i); |
| <span class="macro">assert_eq!</span>(map.len(), i + <span class="number">1</span>); |
| <span class="macro">assert_eq!</span>(map.capacity(), capacity); |
| <span class="macro">assert_eq!</span>(map.get(<span class="kw-2">&</span>i), <span class="prelude-val">Some</span>(<span class="kw-2">&</span>(i * i))); |
| } |
| map.insert(capacity, std::usize::MAX); |
| <span class="macro">assert_eq!</span>(map.len(), capacity + <span class="number">1</span>); |
| <span class="macro">assert!</span>(map.capacity() > capacity); |
| <span class="macro">assert_eq!</span>(map.get(<span class="kw-2">&</span>capacity), <span class="prelude-val">Some</span>(<span class="kw-2">&</span>std::usize::MAX)); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>shrink_to_fit() { |
| <span class="kw">let </span><span class="kw-2">mut </span>map = IndexMap::<usize, usize>::new(); |
| <span class="macro">assert_eq!</span>(map.capacity(), <span class="number">0</span>); |
| <span class="kw">for </span>i <span class="kw">in </span><span class="number">0</span>..<span class="number">100 </span>{ |
| <span class="macro">assert_eq!</span>(map.len(), i); |
| map.insert(i, i * i); |
| <span class="macro">assert_eq!</span>(map.len(), i + <span class="number">1</span>); |
| <span class="macro">assert!</span>(map.capacity() >= i + <span class="number">1</span>); |
| <span class="macro">assert_eq!</span>(map.get(<span class="kw-2">&</span>i), <span class="prelude-val">Some</span>(<span class="kw-2">&</span>(i * i))); |
| map.shrink_to_fit(); |
| <span class="macro">assert_eq!</span>(map.len(), i + <span class="number">1</span>); |
| <span class="macro">assert_eq!</span>(map.capacity(), i + <span class="number">1</span>); |
| <span class="macro">assert_eq!</span>(map.get(<span class="kw-2">&</span>i), <span class="prelude-val">Some</span>(<span class="kw-2">&</span>(i * i))); |
| } |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>remove() { |
| <span class="kw">let </span>insert = [<span class="number">0</span>, <span class="number">4</span>, <span class="number">2</span>, <span class="number">12</span>, <span class="number">8</span>, <span class="number">7</span>, <span class="number">11</span>, <span class="number">5</span>, <span class="number">3</span>, <span class="number">17</span>, <span class="number">19</span>, <span class="number">22</span>, <span class="number">23</span>]; |
| <span class="kw">let </span><span class="kw-2">mut </span>map = IndexMap::new(); |
| |
| <span class="kw">for </span><span class="kw-2">&</span>elt <span class="kw">in </span><span class="kw-2">&</span>insert { |
| map.insert(elt, elt); |
| } |
| |
| <span class="macro">assert_eq!</span>(map.keys().count(), map.len()); |
| <span class="macro">assert_eq!</span>(map.keys().count(), insert.len()); |
| <span class="kw">for </span>(a, b) <span class="kw">in </span>insert.iter().zip(map.keys()) { |
| <span class="macro">assert_eq!</span>(a, b); |
| } |
| |
| <span class="kw">let </span>remove_fail = [<span class="number">99</span>, <span class="number">77</span>]; |
| <span class="kw">let </span>remove = [<span class="number">4</span>, <span class="number">12</span>, <span class="number">8</span>, <span class="number">7</span>]; |
| |
| <span class="kw">for </span><span class="kw-2">&</span>key <span class="kw">in </span><span class="kw-2">&</span>remove_fail { |
| <span class="macro">assert!</span>(map.swap_remove_full(<span class="kw-2">&</span>key).is_none()); |
| } |
| <span class="macro">println!</span>(<span class="string">"{:?}"</span>, map); |
| <span class="kw">for </span><span class="kw-2">&</span>key <span class="kw">in </span><span class="kw-2">&</span>remove { |
| <span class="comment">//println!("{:?}", map); |
| </span><span class="kw">let </span>index = map.get_full(<span class="kw-2">&</span>key).unwrap().<span class="number">0</span>; |
| <span class="macro">assert_eq!</span>(map.swap_remove_full(<span class="kw-2">&</span>key), <span class="prelude-val">Some</span>((index, key, key))); |
| } |
| <span class="macro">println!</span>(<span class="string">"{:?}"</span>, map); |
| |
| <span class="kw">for </span>key <span class="kw">in </span><span class="kw-2">&</span>insert { |
| <span class="macro">assert_eq!</span>(map.get(key).is_some(), !remove.contains(key)); |
| } |
| <span class="macro">assert_eq!</span>(map.len(), insert.len() - remove.len()); |
| <span class="macro">assert_eq!</span>(map.keys().count(), insert.len() - remove.len()); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>remove_to_empty() { |
| <span class="kw">let </span><span class="kw-2">mut </span>map = <span class="macro">indexmap! </span>{ <span class="number">0 </span>=> <span class="number">0</span>, <span class="number">4 </span>=> <span class="number">4</span>, <span class="number">5 </span>=> <span class="number">5 </span>}; |
| map.swap_remove(<span class="kw-2">&</span><span class="number">5</span>).unwrap(); |
| map.swap_remove(<span class="kw-2">&</span><span class="number">4</span>).unwrap(); |
| map.swap_remove(<span class="kw-2">&</span><span class="number">0</span>).unwrap(); |
| <span class="macro">assert!</span>(map.is_empty()); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>swap_remove_index() { |
| <span class="kw">let </span>insert = [<span class="number">0</span>, <span class="number">4</span>, <span class="number">2</span>, <span class="number">12</span>, <span class="number">8</span>, <span class="number">7</span>, <span class="number">11</span>, <span class="number">5</span>, <span class="number">3</span>, <span class="number">17</span>, <span class="number">19</span>, <span class="number">22</span>, <span class="number">23</span>]; |
| <span class="kw">let </span><span class="kw-2">mut </span>map = IndexMap::new(); |
| |
| <span class="kw">for </span><span class="kw-2">&</span>elt <span class="kw">in </span><span class="kw-2">&</span>insert { |
| map.insert(elt, elt * <span class="number">2</span>); |
| } |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>vector = insert.to_vec(); |
| <span class="kw">let </span>remove_sequence = <span class="kw-2">&</span>[<span class="number">3</span>, <span class="number">3</span>, <span class="number">10</span>, <span class="number">4</span>, <span class="number">5</span>, <span class="number">4</span>, <span class="number">3</span>, <span class="number">0</span>, <span class="number">1</span>]; |
| |
| <span class="comment">// check that the same swap remove sequence on vec and map |
| // have the same result. |
| </span><span class="kw">for </span><span class="kw-2">&</span>rm <span class="kw">in </span>remove_sequence { |
| <span class="kw">let </span>out_vec = vector.swap_remove(rm); |
| <span class="kw">let </span>(out_map, <span class="kw">_</span>) = map.swap_remove_index(rm).unwrap(); |
| <span class="macro">assert_eq!</span>(out_vec, out_map); |
| } |
| <span class="macro">assert_eq!</span>(vector.len(), map.len()); |
| <span class="kw">for </span>(a, b) <span class="kw">in </span>vector.iter().zip(map.keys()) { |
| <span class="macro">assert_eq!</span>(a, b); |
| } |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>partial_eq_and_eq() { |
| <span class="kw">let </span><span class="kw-2">mut </span>map_a = IndexMap::new(); |
| map_a.insert(<span class="number">1</span>, <span class="string">"1"</span>); |
| map_a.insert(<span class="number">2</span>, <span class="string">"2"</span>); |
| <span class="kw">let </span><span class="kw-2">mut </span>map_b = map_a.clone(); |
| <span class="macro">assert_eq!</span>(map_a, map_b); |
| map_b.swap_remove(<span class="kw-2">&</span><span class="number">1</span>); |
| <span class="macro">assert_ne!</span>(map_a, map_b); |
| |
| <span class="kw">let </span>map_c: IndexMap<<span class="kw">_</span>, String> = map_b.into_iter().map(|(k, v)| (k, v.into())).collect(); |
| <span class="macro">assert_ne!</span>(map_a, map_c); |
| <span class="macro">assert_ne!</span>(map_c, map_a); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>extend() { |
| <span class="kw">let </span><span class="kw-2">mut </span>map = IndexMap::new(); |
| map.extend(<span class="macro">vec!</span>[(<span class="kw-2">&</span><span class="number">1</span>, <span class="kw-2">&</span><span class="number">2</span>), (<span class="kw-2">&</span><span class="number">3</span>, <span class="kw-2">&</span><span class="number">4</span>)]); |
| map.extend(<span class="macro">vec!</span>[(<span class="number">5</span>, <span class="number">6</span>)]); |
| <span class="macro">assert_eq!</span>( |
| map.into_iter().collect::<Vec<<span class="kw">_</span>>>(), |
| <span class="macro">vec!</span>[(<span class="number">1</span>, <span class="number">2</span>), (<span class="number">3</span>, <span class="number">4</span>), (<span class="number">5</span>, <span class="number">6</span>)] |
| ); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>entry() { |
| <span class="kw">let </span><span class="kw-2">mut </span>map = IndexMap::new(); |
| |
| map.insert(<span class="number">1</span>, <span class="string">"1"</span>); |
| map.insert(<span class="number">2</span>, <span class="string">"2"</span>); |
| { |
| <span class="kw">let </span>e = map.entry(<span class="number">3</span>); |
| <span class="macro">assert_eq!</span>(e.index(), <span class="number">2</span>); |
| <span class="kw">let </span>e = e.or_insert(<span class="string">"3"</span>); |
| <span class="macro">assert_eq!</span>(e, <span class="kw-2">&</span><span class="string">"3"</span>); |
| } |
| |
| <span class="kw">let </span>e = map.entry(<span class="number">2</span>); |
| <span class="macro">assert_eq!</span>(e.index(), <span class="number">1</span>); |
| <span class="macro">assert_eq!</span>(e.key(), <span class="kw-2">&</span><span class="number">2</span>); |
| <span class="kw">match </span>e { |
| Entry::Occupied(<span class="kw-2">ref </span>e) => <span class="macro">assert_eq!</span>(e.get(), <span class="kw-2">&</span><span class="string">"2"</span>), |
| Entry::Vacant(<span class="kw">_</span>) => <span class="macro">panic!</span>(), |
| } |
| <span class="macro">assert_eq!</span>(e.or_insert(<span class="string">"4"</span>), <span class="kw-2">&</span><span class="string">"2"</span>); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>entry_and_modify() { |
| <span class="kw">let </span><span class="kw-2">mut </span>map = IndexMap::new(); |
| |
| map.insert(<span class="number">1</span>, <span class="string">"1"</span>); |
| map.entry(<span class="number">1</span>).and_modify(|x| <span class="kw-2">*</span>x = <span class="string">"2"</span>); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">Some</span>(<span class="kw-2">&</span><span class="string">"2"</span>), map.get(<span class="kw-2">&</span><span class="number">1</span>)); |
| |
| map.entry(<span class="number">2</span>).and_modify(|x| <span class="kw-2">*</span>x = <span class="string">"doesn't exist"</span>); |
| <span class="macro">assert_eq!</span>(<span class="prelude-val">None</span>, map.get(<span class="kw-2">&</span><span class="number">2</span>)); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>entry_or_default() { |
| <span class="kw">let </span><span class="kw-2">mut </span>map = IndexMap::new(); |
| |
| <span class="attribute">#[derive(Debug, PartialEq)] |
| </span><span class="kw">enum </span>TestEnum { |
| DefaultValue, |
| NonDefaultValue, |
| } |
| |
| <span class="kw">impl </span>Default <span class="kw">for </span>TestEnum { |
| <span class="kw">fn </span>default() -> <span class="self">Self </span>{ |
| TestEnum::DefaultValue |
| } |
| } |
| |
| map.insert(<span class="number">1</span>, TestEnum::NonDefaultValue); |
| <span class="macro">assert_eq!</span>(<span class="kw-2">&mut </span>TestEnum::NonDefaultValue, map.entry(<span class="number">1</span>).or_default()); |
| |
| <span class="macro">assert_eq!</span>(<span class="kw-2">&mut </span>TestEnum::DefaultValue, map.entry(<span class="number">2</span>).or_default()); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>occupied_entry_key() { |
| <span class="comment">// These keys match hash and equality, but their addresses are distinct. |
| </span><span class="kw">let </span>(k1, k2) = (<span class="kw-2">&mut </span><span class="number">1</span>, <span class="kw-2">&mut </span><span class="number">1</span>); |
| <span class="kw">let </span>k1_ptr = k1 <span class="kw">as </span><span class="kw-2">*const </span>i32; |
| <span class="kw">let </span>k2_ptr = k2 <span class="kw">as </span><span class="kw-2">*const </span>i32; |
| <span class="macro">assert_ne!</span>(k1_ptr, k2_ptr); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>map = IndexMap::new(); |
| map.insert(k1, <span class="string">"value"</span>); |
| <span class="kw">match </span>map.entry(k2) { |
| Entry::Occupied(<span class="kw-2">ref </span>e) => { |
| <span class="comment">// `OccupiedEntry::key` should reference the key in the map, |
| // not the key that was used to find the entry. |
| </span><span class="kw">let </span>ptr = <span class="kw-2">*</span>e.key() <span class="kw">as </span><span class="kw-2">*const </span>i32; |
| <span class="macro">assert_eq!</span>(ptr, k1_ptr); |
| <span class="macro">assert_ne!</span>(ptr, k2_ptr); |
| } |
| Entry::Vacant(<span class="kw">_</span>) => <span class="macro">panic!</span>(), |
| } |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>keys() { |
| <span class="kw">let </span>vec = <span class="macro">vec!</span>[(<span class="number">1</span>, <span class="string">'a'</span>), (<span class="number">2</span>, <span class="string">'b'</span>), (<span class="number">3</span>, <span class="string">'c'</span>)]; |
| <span class="kw">let </span>map: IndexMap<<span class="kw">_</span>, <span class="kw">_</span>> = vec.into_iter().collect(); |
| <span class="kw">let </span>keys: Vec<<span class="kw">_</span>> = map.keys().copied().collect(); |
| <span class="macro">assert_eq!</span>(keys.len(), <span class="number">3</span>); |
| <span class="macro">assert!</span>(keys.contains(<span class="kw-2">&</span><span class="number">1</span>)); |
| <span class="macro">assert!</span>(keys.contains(<span class="kw-2">&</span><span class="number">2</span>)); |
| <span class="macro">assert!</span>(keys.contains(<span class="kw-2">&</span><span class="number">3</span>)); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>into_keys() { |
| <span class="kw">let </span>vec = <span class="macro">vec!</span>[(<span class="number">1</span>, <span class="string">'a'</span>), (<span class="number">2</span>, <span class="string">'b'</span>), (<span class="number">3</span>, <span class="string">'c'</span>)]; |
| <span class="kw">let </span>map: IndexMap<<span class="kw">_</span>, <span class="kw">_</span>> = vec.into_iter().collect(); |
| <span class="kw">let </span>keys: Vec<i32> = map.into_keys().collect(); |
| <span class="macro">assert_eq!</span>(keys.len(), <span class="number">3</span>); |
| <span class="macro">assert!</span>(keys.contains(<span class="kw-2">&</span><span class="number">1</span>)); |
| <span class="macro">assert!</span>(keys.contains(<span class="kw-2">&</span><span class="number">2</span>)); |
| <span class="macro">assert!</span>(keys.contains(<span class="kw-2">&</span><span class="number">3</span>)); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>values() { |
| <span class="kw">let </span>vec = <span class="macro">vec!</span>[(<span class="number">1</span>, <span class="string">'a'</span>), (<span class="number">2</span>, <span class="string">'b'</span>), (<span class="number">3</span>, <span class="string">'c'</span>)]; |
| <span class="kw">let </span>map: IndexMap<<span class="kw">_</span>, <span class="kw">_</span>> = vec.into_iter().collect(); |
| <span class="kw">let </span>values: Vec<<span class="kw">_</span>> = map.values().copied().collect(); |
| <span class="macro">assert_eq!</span>(values.len(), <span class="number">3</span>); |
| <span class="macro">assert!</span>(values.contains(<span class="kw-2">&</span><span class="string">'a'</span>)); |
| <span class="macro">assert!</span>(values.contains(<span class="kw-2">&</span><span class="string">'b'</span>)); |
| <span class="macro">assert!</span>(values.contains(<span class="kw-2">&</span><span class="string">'c'</span>)); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>values_mut() { |
| <span class="kw">let </span>vec = <span class="macro">vec!</span>[(<span class="number">1</span>, <span class="number">1</span>), (<span class="number">2</span>, <span class="number">2</span>), (<span class="number">3</span>, <span class="number">3</span>)]; |
| <span class="kw">let </span><span class="kw-2">mut </span>map: IndexMap<<span class="kw">_</span>, <span class="kw">_</span>> = vec.into_iter().collect(); |
| <span class="kw">for </span>value <span class="kw">in </span>map.values_mut() { |
| <span class="kw-2">*</span>value <span class="kw-2">*</span>= <span class="number">2 |
| </span>} |
| <span class="kw">let </span>values: Vec<<span class="kw">_</span>> = map.values().copied().collect(); |
| <span class="macro">assert_eq!</span>(values.len(), <span class="number">3</span>); |
| <span class="macro">assert!</span>(values.contains(<span class="kw-2">&</span><span class="number">2</span>)); |
| <span class="macro">assert!</span>(values.contains(<span class="kw-2">&</span><span class="number">4</span>)); |
| <span class="macro">assert!</span>(values.contains(<span class="kw-2">&</span><span class="number">6</span>)); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>into_values() { |
| <span class="kw">let </span>vec = <span class="macro">vec!</span>[(<span class="number">1</span>, <span class="string">'a'</span>), (<span class="number">2</span>, <span class="string">'b'</span>), (<span class="number">3</span>, <span class="string">'c'</span>)]; |
| <span class="kw">let </span>map: IndexMap<<span class="kw">_</span>, <span class="kw">_</span>> = vec.into_iter().collect(); |
| <span class="kw">let </span>values: Vec<char> = map.into_values().collect(); |
| <span class="macro">assert_eq!</span>(values.len(), <span class="number">3</span>); |
| <span class="macro">assert!</span>(values.contains(<span class="kw-2">&</span><span class="string">'a'</span>)); |
| <span class="macro">assert!</span>(values.contains(<span class="kw-2">&</span><span class="string">'b'</span>)); |
| <span class="macro">assert!</span>(values.contains(<span class="kw-2">&</span><span class="string">'c'</span>)); |
| } |
| |
| <span class="attribute">#[test] |
| #[cfg(has_std)] |
| </span><span class="kw">fn </span>from_array() { |
| <span class="kw">let </span>map = IndexMap::from([(<span class="number">1</span>, <span class="number">2</span>), (<span class="number">3</span>, <span class="number">4</span>)]); |
| <span class="kw">let </span><span class="kw-2">mut </span>expected = IndexMap::new(); |
| expected.insert(<span class="number">1</span>, <span class="number">2</span>); |
| expected.insert(<span class="number">3</span>, <span class="number">4</span>); |
| |
| <span class="macro">assert_eq!</span>(map, expected) |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="indexmap" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |