| <!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/tinyvec-1.6.0/src/arrayvec.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>arrayvec.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="../../tinyvec/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="../../tinyvec/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="1871">1871</span> |
| <span id="1872">1872</span> |
| <span id="1873">1873</span> |
| </pre><pre class="rust"><code><span class="kw">use super</span>::<span class="kw-2">*</span>; |
| <span class="kw">use </span>core::convert::{TryFrom, TryInto}; |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"serde"</span>)] |
| </span><span class="kw">use </span>core::marker::PhantomData; |
| <span class="attribute">#[cfg(feature = <span class="string">"serde"</span>)] |
| </span><span class="kw">use </span>serde::de::{ |
| Deserialize, Deserializer, Error <span class="kw">as </span>DeserializeError, SeqAccess, Visitor, |
| }; |
| <span class="attribute">#[cfg(feature = <span class="string">"serde"</span>)] |
| </span><span class="kw">use </span>serde::ser::{Serialize, SerializeSeq, Serializer}; |
| |
| <span class="doccomment">/// Helper to make an `ArrayVec`. |
| /// |
| /// You specify the backing array type, and optionally give all the elements you |
| /// want to initially place into the array. |
| /// |
| /// ```rust |
| /// use tinyvec::*; |
| /// |
| /// // The backing array type can be specified in the macro call |
| /// let empty_av = array_vec!([u8; 16]); |
| /// let some_ints = array_vec!([i32; 4] => 1, 2, 3); |
| /// |
| /// // Or left to inference |
| /// let empty_av: ArrayVec<[u8; 10]> = array_vec!(); |
| /// let some_ints: ArrayVec<[u8; 10]> = array_vec!(5, 6, 7, 8); |
| /// ``` |
| </span><span class="attribute">#[macro_export] |
| </span><span class="macro">macro_rules! </span>array_vec { |
| (<span class="macro-nonterminal">$array_type</span>:ty => $(<span class="macro-nonterminal">$elem</span>:expr),* $(,)<span class="question-mark">?</span>) => { |
| { |
| <span class="kw">let </span><span class="kw-2">mut </span>av: <span class="macro-nonterminal">$crate::ArrayVec</span><<span class="macro-nonterminal">$array_type</span>> = Default::default(); |
| $( av.push(<span class="macro-nonterminal">$elem</span>); )* |
| av |
| } |
| }; |
| (<span class="macro-nonterminal">$array_type</span>:ty) => { |
| <span class="macro-nonterminal">$crate::ArrayVec</span>::<<span class="macro-nonterminal">$array_type</span>>::default() |
| }; |
| ($(<span class="macro-nonterminal">$elem</span>:expr),<span class="kw-2">*</span>) => { |
| <span class="macro-nonterminal">$</span><span class="macro">crate::array_vec!</span>(<span class="kw">_ </span>=> $(<span class="macro-nonterminal">$elem</span>),<span class="kw-2">*</span>) |
| }; |
| (<span class="macro-nonterminal">$elem</span>:expr; <span class="macro-nonterminal">$n</span>:expr) => { |
| <span class="macro-nonterminal">$crate::ArrayVec::from</span>([<span class="macro-nonterminal">$elem</span>; <span class="macro-nonterminal">$n</span>]) |
| }; |
| () => { |
| <span class="macro-nonterminal">$</span><span class="macro">crate::array_vec!</span>(<span class="kw">_</span>) |
| }; |
| } |
| |
| <span class="doccomment">/// An array-backed, vector-like data structure. |
| /// |
| /// * `ArrayVec` has a fixed capacity, equal to the array size. |
| /// * `ArrayVec` has a variable length, as you add and remove elements. Attempts |
| /// to fill the vec beyond its capacity will cause a panic. |
| /// * All of the vec's array slots are always initialized in terms of Rust's |
| /// memory model. When you remove a element from a location, the old value at |
| /// that location is replaced with the type's default value. |
| /// |
| /// The overall API of this type is intended to, as much as possible, emulate |
| /// the API of the [`Vec`](https://doc.rust-lang.org/alloc/vec/struct.Vec.html) |
| /// type. |
| /// |
| /// ## Construction |
| /// |
| /// You can use the `array_vec!` macro similarly to how you might use the `vec!` |
| /// macro. Specify the array type, then optionally give all the initial values |
| /// you want to have. |
| /// ```rust |
| /// # use tinyvec::*; |
| /// let some_ints = array_vec!([i32; 4] => 1, 2, 3); |
| /// assert_eq!(some_ints.len(), 3); |
| /// ``` |
| /// |
| /// The [`default`](ArrayVec::new) for an `ArrayVec` is to have a default |
| /// array with length 0. The [`new`](ArrayVec::new) method is the same as |
| /// calling `default` |
| /// ```rust |
| /// # use tinyvec::*; |
| /// let some_ints = ArrayVec::<[i32; 7]>::default(); |
| /// assert_eq!(some_ints.len(), 0); |
| /// |
| /// let more_ints = ArrayVec::<[i32; 7]>::new(); |
| /// assert_eq!(some_ints, more_ints); |
| /// ``` |
| /// |
| /// If you have an array and want the _whole thing_ so count as being "in" the |
| /// new `ArrayVec` you can use one of the `from` implementations. If you want |
| /// _part of_ the array then you can use |
| /// [`from_array_len`](ArrayVec::from_array_len): |
| /// ```rust |
| /// # use tinyvec::*; |
| /// let some_ints = ArrayVec::from([5, 6, 7, 8]); |
| /// assert_eq!(some_ints.len(), 4); |
| /// |
| /// let more_ints = ArrayVec::from_array_len([5, 6, 7, 8], 2); |
| /// assert_eq!(more_ints.len(), 2); |
| /// |
| /// let no_ints: ArrayVec<[u8; 5]> = ArrayVec::from_array_empty([1, 2, 3, 4, 5]); |
| /// assert_eq!(no_ints.len(), 0); |
| /// ``` |
| </span><span class="attribute">#[<span class="macro-nonterminal">repr</span>(C)] |
| </span><span class="kw">pub struct </span>ArrayVec<A> { |
| len: u16, |
| <span class="kw">pub</span>(<span class="kw">crate</span>) data: A, |
| } |
| |
| <span class="kw">impl</span><A> Clone <span class="kw">for </span>ArrayVec<A> |
| <span class="kw">where |
| </span>A: Array + Clone, |
| A::Item: Clone, |
| { |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>clone(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="self">Self </span>{ |
| <span class="self">Self </span>{ data: <span class="self">self</span>.data.clone(), len: <span class="self">self</span>.len } |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>clone_from(<span class="kw-2">&mut </span><span class="self">self</span>, o: <span class="kw-2">&</span><span class="self">Self</span>) { |
| <span class="kw">let </span>iter = <span class="self">self |
| </span>.data |
| .as_slice_mut() |
| .iter_mut() |
| .zip(o.data.as_slice()) |
| .take(<span class="self">self</span>.len.max(o.len) <span class="kw">as </span>usize); |
| <span class="kw">for </span>(dst, src) <span class="kw">in </span>iter { |
| dst.clone_from(src) |
| } |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(to_drop) = |
| <span class="self">self</span>.data.as_slice_mut().get_mut((o.len <span class="kw">as </span>usize)..(<span class="self">self</span>.len <span class="kw">as </span>usize)) |
| { |
| to_drop.iter_mut().for_each(|x| drop(take(x))); |
| } |
| <span class="self">self</span>.len = o.len; |
| } |
| } |
| |
| <span class="kw">impl</span><A> Copy <span class="kw">for </span>ArrayVec<A> |
| <span class="kw">where |
| </span>A: Array + Copy, |
| A::Item: Copy, |
| { |
| } |
| |
| <span class="kw">impl</span><A: Array> Default <span class="kw">for </span>ArrayVec<A> { |
| <span class="kw">fn </span>default() -> <span class="self">Self </span>{ |
| <span class="self">Self </span>{ len: <span class="number">0</span>, data: A::default() } |
| } |
| } |
| |
| <span class="kw">impl</span><A: Array> Deref <span class="kw">for </span>ArrayVec<A> { |
| <span class="kw">type </span>Target = [A::Item]; |
| <span class="attribute">#[inline(always)] |
| #[must_use] |
| </span><span class="kw">fn </span>deref(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span><span class="self">Self</span>::Target { |
| <span class="kw-2">&</span><span class="self">self</span>.data.as_slice()[..<span class="self">self</span>.len <span class="kw">as </span>usize] |
| } |
| } |
| |
| <span class="kw">impl</span><A: Array> DerefMut <span class="kw">for </span>ArrayVec<A> { |
| <span class="attribute">#[inline(always)] |
| #[must_use] |
| </span><span class="kw">fn </span>deref_mut(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="kw-2">&mut </span><span class="self">Self</span>::Target { |
| <span class="kw-2">&mut </span><span class="self">self</span>.data.as_slice_mut()[..<span class="self">self</span>.len <span class="kw">as </span>usize] |
| } |
| } |
| |
| <span class="kw">impl</span><A: Array, I: SliceIndex<[A::Item]>> Index<I> <span class="kw">for </span>ArrayVec<A> { |
| <span class="kw">type </span>Output = <I <span class="kw">as </span>SliceIndex<[A::Item]>>::Output; |
| <span class="attribute">#[inline(always)] |
| #[must_use] |
| </span><span class="kw">fn </span>index(<span class="kw-2">&</span><span class="self">self</span>, index: I) -> <span class="kw-2">&</span><span class="self">Self</span>::Output { |
| <span class="kw-2">&</span><span class="self">self</span>.deref()[index] |
| } |
| } |
| |
| <span class="kw">impl</span><A: Array, I: SliceIndex<[A::Item]>> IndexMut<I> <span class="kw">for </span>ArrayVec<A> { |
| <span class="attribute">#[inline(always)] |
| #[must_use] |
| </span><span class="kw">fn </span>index_mut(<span class="kw-2">&mut </span><span class="self">self</span>, index: I) -> <span class="kw-2">&mut </span><span class="self">Self</span>::Output { |
| <span class="kw-2">&mut </span><span class="self">self</span>.deref_mut()[index] |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"serde"</span>)] |
| #[cfg_attr(docs_rs, doc(cfg(feature = <span class="string">"serde"</span>)))] |
| </span><span class="kw">impl</span><A: Array> Serialize <span class="kw">for </span>ArrayVec<A> |
| <span class="kw">where |
| </span>A::Item: Serialize, |
| { |
| <span class="attribute">#[must_use] |
| </span><span class="kw">fn </span>serialize<S>(<span class="kw-2">&</span><span class="self">self</span>, serializer: S) -> <span class="prelude-ty">Result</span><S::Ok, S::Error> |
| <span class="kw">where |
| </span>S: Serializer, |
| { |
| <span class="kw">let </span><span class="kw-2">mut </span>seq = serializer.serialize_seq(<span class="prelude-val">Some</span>(<span class="self">self</span>.len()))<span class="question-mark">?</span>; |
| <span class="kw">for </span>element <span class="kw">in </span><span class="self">self</span>.iter() { |
| seq.serialize_element(element)<span class="question-mark">?</span>; |
| } |
| seq.end() |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"serde"</span>)] |
| #[cfg_attr(docs_rs, doc(cfg(feature = <span class="string">"serde"</span>)))] |
| </span><span class="kw">impl</span><<span class="lifetime">'de</span>, A: Array> Deserialize<<span class="lifetime">'de</span>> <span class="kw">for </span>ArrayVec<A> |
| <span class="kw">where |
| </span>A::Item: Deserialize<<span class="lifetime">'de</span>>, |
| { |
| <span class="kw">fn </span>deserialize<D>(deserializer: D) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>, D::Error> |
| <span class="kw">where |
| </span>D: Deserializer<<span class="lifetime">'de</span>>, |
| { |
| deserializer.deserialize_seq(ArrayVecVisitor(PhantomData)) |
| } |
| } |
| |
| <span class="attribute">#[cfg(all(feature = <span class="string">"arbitrary"</span>, feature = <span class="string">"nightly_const_generics"</span>))] |
| #[cfg_attr( |
| docs_rs, |
| doc(cfg(all(feature = <span class="string">"arbitrary"</span>, feature = <span class="string">"nightly_const_generics"</span>))) |
| )] |
| </span><span class="kw">impl</span><<span class="lifetime">'a</span>, T, <span class="kw">const </span>N: usize> arbitrary::Arbitrary<<span class="lifetime">'a</span>> <span class="kw">for </span>ArrayVec<[T; N]> |
| <span class="kw">where |
| </span>T: arbitrary::Arbitrary<<span class="lifetime">'a</span>> + Default, |
| { |
| <span class="kw">fn </span>arbitrary(u: <span class="kw-2">&mut </span>arbitrary::Unstructured<<span class="lifetime">'a</span>>) -> arbitrary::Result<<span class="self">Self</span>> { |
| <span class="kw">let </span>v = <[T; N]>::arbitrary(u)<span class="question-mark">?</span>; |
| <span class="kw">let </span>av = ArrayVec::from(v); |
| <span class="prelude-val">Ok</span>(av) |
| } |
| } |
| |
| <span class="kw">impl</span><A: Array> ArrayVec<A> { |
| <span class="doccomment">/// Move all values from `other` into this vec. |
| /// |
| /// ## Panics |
| /// * If the vec overflows its capacity |
| /// |
| /// ## Example |
| /// ```rust |
| /// # use tinyvec::*; |
| /// let mut av = array_vec!([i32; 10] => 1, 2, 3); |
| /// let mut av2 = array_vec!([i32; 10] => 4, 5, 6); |
| /// av.append(&mut av2); |
| /// assert_eq!(av, &[1, 2, 3, 4, 5, 6][..]); |
| /// assert_eq!(av2, &[][..]); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>append(<span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&mut </span><span class="self">Self</span>) { |
| <span class="macro">assert!</span>( |
| <span class="self">self</span>.try_append(other).is_none(), |
| <span class="string">"ArrayVec::append> total length {} exceeds capacity {}!"</span>, |
| <span class="self">self</span>.len() + other.len(), |
| A::CAPACITY |
| ); |
| } |
| |
| <span class="doccomment">/// Move all values from `other` into this vec. |
| /// If appending would overflow the capacity, Some(other) is returned. |
| /// ## Example |
| /// ```rust |
| /// # use tinyvec::*; |
| /// let mut av = array_vec!([i32; 7] => 1, 2, 3); |
| /// let mut av2 = array_vec!([i32; 7] => 4, 5, 6); |
| /// av.append(&mut av2); |
| /// assert_eq!(av, &[1, 2, 3, 4, 5, 6][..]); |
| /// assert_eq!(av2, &[][..]); |
| /// |
| /// let mut av3 = array_vec!([i32; 7] => 7, 8, 9); |
| /// assert!(av.try_append(&mut av3).is_some()); |
| /// assert_eq!(av, &[1, 2, 3, 4, 5, 6][..]); |
| /// assert_eq!(av3, &[7, 8, 9][..]); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>try_append<<span class="lifetime">'other</span>>( |
| <span class="kw-2">&mut </span><span class="self">self</span>, other: <span class="kw-2">&</span><span class="lifetime">'other </span><span class="kw-2">mut </span><span class="self">Self</span>, |
| ) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span><span class="lifetime">'other </span><span class="kw-2">mut </span><span class="self">Self</span>> { |
| <span class="kw">let </span>new_len = <span class="self">self</span>.len() + other.len(); |
| <span class="kw">if </span>new_len > A::CAPACITY { |
| <span class="kw">return </span><span class="prelude-val">Some</span>(other); |
| } |
| |
| <span class="kw">let </span>iter = other.iter_mut().map(take); |
| <span class="kw">for </span>item <span class="kw">in </span>iter { |
| <span class="self">self</span>.push(item); |
| } |
| |
| other.set_len(<span class="number">0</span>); |
| |
| <span class="kw">return </span><span class="prelude-val">None</span>; |
| } |
| |
| <span class="doccomment">/// A `*mut` pointer to the backing array. |
| /// |
| /// ## Safety |
| /// |
| /// This pointer has provenance over the _entire_ backing array. |
| </span><span class="attribute">#[inline(always)] |
| #[must_use] |
| </span><span class="kw">pub fn </span>as_mut_ptr(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="kw-2">*mut </span>A::Item { |
| <span class="self">self</span>.data.as_slice_mut().as_mut_ptr() |
| } |
| |
| <span class="doccomment">/// Performs a `deref_mut`, into unique slice form. |
| </span><span class="attribute">#[inline(always)] |
| #[must_use] |
| </span><span class="kw">pub fn </span>as_mut_slice(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="kw-2">&mut </span>[A::Item] { |
| <span class="self">self</span>.deref_mut() |
| } |
| |
| <span class="doccomment">/// A `*const` pointer to the backing array. |
| /// |
| /// ## Safety |
| /// |
| /// This pointer has provenance over the _entire_ backing array. |
| </span><span class="attribute">#[inline(always)] |
| #[must_use] |
| </span><span class="kw">pub fn </span>as_ptr(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">*const </span>A::Item { |
| <span class="self">self</span>.data.as_slice().as_ptr() |
| } |
| |
| <span class="doccomment">/// Performs a `deref`, into shared slice form. |
| </span><span class="attribute">#[inline(always)] |
| #[must_use] |
| </span><span class="kw">pub fn </span>as_slice(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>[A::Item] { |
| <span class="self">self</span>.deref() |
| } |
| |
| <span class="doccomment">/// The capacity of the `ArrayVec`. |
| /// |
| /// This is fixed based on the array type, but can't yet be made a `const fn` |
| /// on Stable Rust. |
| </span><span class="attribute">#[inline(always)] |
| #[must_use] |
| </span><span class="kw">pub fn </span>capacity(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="comment">// Note: This shouldn't use A::CAPACITY, because unsafe code can't rely on |
| // any Array invariants. This ensures that at the very least, the returned |
| // value is a valid length for a subslice of the backing array. |
| </span><span class="self">self</span>.data.as_slice().len() |
| } |
| |
| <span class="doccomment">/// Truncates the `ArrayVec` down to length 0. |
| </span><span class="attribute">#[inline(always)] |
| </span><span class="kw">pub fn </span>clear(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="self">self</span>.truncate(<span class="number">0</span>) |
| } |
| |
| <span class="doccomment">/// Creates a draining iterator that removes the specified range in the vector |
| /// and yields the removed items. |
| /// |
| /// ## Panics |
| /// * If the start is greater than the end |
| /// * If the end is past the edge of the vec. |
| /// |
| /// ## Example |
| /// ```rust |
| /// # use tinyvec::*; |
| /// let mut av = array_vec!([i32; 4] => 1, 2, 3); |
| /// let av2: ArrayVec<[i32; 4]> = av.drain(1..).collect(); |
| /// assert_eq!(av.as_slice(), &[1][..]); |
| /// assert_eq!(av2.as_slice(), &[2, 3][..]); |
| /// |
| /// av.drain(..); |
| /// assert_eq!(av.as_slice(), &[]); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>drain<R>(<span class="kw-2">&mut </span><span class="self">self</span>, range: R) -> ArrayVecDrain<<span class="lifetime">'_</span>, A::Item> |
| <span class="kw">where |
| </span>R: RangeBounds<usize>, |
| { |
| ArrayVecDrain::new(<span class="self">self</span>, range) |
| } |
| |
| <span class="doccomment">/// Returns the inner array of the `ArrayVec`. |
| /// |
| /// This returns the full array, even if the `ArrayVec` length is currently |
| /// less than that. |
| /// |
| /// ## Example |
| /// |
| /// ```rust |
| /// # use tinyvec::{array_vec, ArrayVec}; |
| /// let mut favorite_numbers = array_vec!([i32; 5] => 87, 48, 33, 9, 26); |
| /// assert_eq!(favorite_numbers.clone().into_inner(), [87, 48, 33, 9, 26]); |
| /// |
| /// favorite_numbers.pop(); |
| /// assert_eq!(favorite_numbers.into_inner(), [87, 48, 33, 9, 0]); |
| /// ``` |
| /// |
| /// A use for this function is to build an array from an iterator by first |
| /// collecting it into an `ArrayVec`. |
| /// |
| /// ```rust |
| /// # use tinyvec::ArrayVec; |
| /// let arr_vec: ArrayVec<[i32; 10]> = (1..=3).cycle().take(10).collect(); |
| /// let inner = arr_vec.into_inner(); |
| /// assert_eq!(inner, [1, 2, 3, 1, 2, 3, 1, 2, 3, 1]); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>into_inner(<span class="self">self</span>) -> A { |
| <span class="self">self</span>.data |
| } |
| |
| <span class="doccomment">/// Clone each element of the slice into this `ArrayVec`. |
| /// |
| /// ## Panics |
| /// * If the `ArrayVec` would overflow, this will panic. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>extend_from_slice(<span class="kw-2">&mut </span><span class="self">self</span>, sli: <span class="kw-2">&</span>[A::Item]) |
| <span class="kw">where |
| </span>A::Item: Clone, |
| { |
| <span class="kw">if </span>sli.is_empty() { |
| <span class="kw">return</span>; |
| } |
| |
| <span class="kw">let </span>new_len = <span class="self">self</span>.len <span class="kw">as </span>usize + sli.len(); |
| <span class="macro">assert!</span>( |
| new_len <= A::CAPACITY, |
| <span class="string">"ArrayVec::extend_from_slice> total length {} exceeds capacity {}!"</span>, |
| new_len, |
| A::CAPACITY |
| ); |
| |
| <span class="kw">let </span>target = <span class="kw-2">&mut </span><span class="self">self</span>.data.as_slice_mut()[<span class="self">self</span>.len <span class="kw">as </span>usize..new_len]; |
| target.clone_from_slice(sli); |
| <span class="self">self</span>.set_len(new_len); |
| } |
| |
| <span class="doccomment">/// Fill the vector until its capacity has been reached. |
| /// |
| /// Successively fills unused space in the spare slice of the vector with |
| /// elements from the iterator. It then returns the remaining iterator |
| /// without exhausting it. This also allows appending the head of an |
| /// infinite iterator. |
| /// |
| /// This is an alternative to `Extend::extend` method for cases where the |
| /// length of the iterator can not be checked. Since this vector can not |
| /// reallocate to increase its capacity, it is unclear what to do with |
| /// remaining elements in the iterator and the iterator itself. The |
| /// interface also provides no way to communicate this to the caller. |
| /// |
| /// ## Panics |
| /// * If the `next` method of the provided iterator panics. |
| /// |
| /// ## Example |
| /// |
| /// ```rust |
| /// # use tinyvec::*; |
| /// let mut av = array_vec!([i32; 4]); |
| /// let mut to_inf = av.fill(0..); |
| /// assert_eq!(&av[..], [0, 1, 2, 3]); |
| /// assert_eq!(to_inf.next(), Some(4)); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>fill<I: IntoIterator<Item = A::Item>>( |
| <span class="kw-2">&mut </span><span class="self">self</span>, iter: I, |
| ) -> I::IntoIter { |
| <span class="comment">// If this is written as a call to push for each element in iter, the |
| // compiler emits code that updates the length for every element. The |
| // additional complexity from that length update is worth nearly 2x in |
| // the runtime of this function. |
| </span><span class="kw">let </span><span class="kw-2">mut </span>iter = iter.into_iter(); |
| <span class="kw">let </span><span class="kw-2">mut </span>pushed = <span class="number">0</span>; |
| <span class="kw">let </span>to_take = <span class="self">self</span>.capacity() - <span class="self">self</span>.len(); |
| <span class="kw">let </span>target = <span class="kw-2">&mut </span><span class="self">self</span>.data.as_slice_mut()[<span class="self">self</span>.len <span class="kw">as </span>usize..]; |
| <span class="kw">for </span>element <span class="kw">in </span>iter.by_ref().take(to_take) { |
| target[pushed] = element; |
| pushed += <span class="number">1</span>; |
| } |
| <span class="self">self</span>.len += pushed <span class="kw">as </span>u16; |
| iter |
| } |
| |
| <span class="doccomment">/// Wraps up an array and uses the given length as the initial length. |
| /// |
| /// If you want to simply use the full array, use `from` instead. |
| /// |
| /// ## Panics |
| /// |
| /// * The length specified must be less than or equal to the capacity of the |
| /// array. |
| </span><span class="attribute">#[inline] |
| #[must_use] |
| #[allow(clippy::match_wild_err_arm)] |
| </span><span class="kw">pub fn </span>from_array_len(data: A, len: usize) -> <span class="self">Self </span>{ |
| <span class="kw">match </span><span class="self">Self</span>::try_from_array_len(data, len) { |
| <span class="prelude-val">Ok</span>(out) => out, |
| <span class="prelude-val">Err</span>(<span class="kw">_</span>) => <span class="macro">panic!</span>( |
| <span class="string">"ArrayVec::from_array_len> length {} exceeds capacity {}!"</span>, |
| len, |
| A::CAPACITY |
| ), |
| } |
| } |
| |
| <span class="doccomment">/// Inserts an item at the position given, moving all following elements +1 |
| /// index. |
| /// |
| /// ## Panics |
| /// * If `index` > `len` |
| /// * If the capacity is exhausted |
| /// |
| /// ## Example |
| /// ```rust |
| /// use tinyvec::*; |
| /// let mut av = array_vec!([i32; 10] => 1, 2, 3); |
| /// av.insert(1, 4); |
| /// assert_eq!(av.as_slice(), &[1, 4, 2, 3]); |
| /// av.insert(4, 5); |
| /// assert_eq!(av.as_slice(), &[1, 4, 2, 3, 5]); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>insert(<span class="kw-2">&mut </span><span class="self">self</span>, index: usize, item: A::Item) { |
| <span class="kw">let </span>x = <span class="self">self</span>.try_insert(index, item); |
| <span class="macro">assert!</span>(x.is_none(), <span class="string">"ArrayVec::insert> capacity overflow!"</span>); |
| } |
| |
| <span class="doccomment">/// Tries to insert an item at the position given, moving all following |
| /// elements +1 index. |
| /// Returns back the element if the capacity is exhausted, |
| /// otherwise returns None. |
| /// |
| /// ## Panics |
| /// * If `index` > `len` |
| /// |
| /// ## Example |
| /// ```rust |
| /// use tinyvec::*; |
| /// let mut av = array_vec!([&'static str; 4] => "one", "two", "three"); |
| /// av.insert(1, "four"); |
| /// assert_eq!(av.as_slice(), &["one", "four", "two", "three"]); |
| /// assert_eq!(av.try_insert(4, "five"), Some("five")); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>try_insert( |
| <span class="kw-2">&mut </span><span class="self">self</span>, index: usize, <span class="kw-2">mut </span>item: A::Item, |
| ) -> <span class="prelude-ty">Option</span><A::Item> { |
| <span class="macro">assert!</span>( |
| index <= <span class="self">self</span>.len <span class="kw">as </span>usize, |
| <span class="string">"ArrayVec::try_insert> index {} is out of bounds {}"</span>, |
| index, |
| <span class="self">self</span>.len |
| ); |
| |
| <span class="comment">// A previous implementation used self.try_push and slice::rotate_right |
| // rotate_right and rotate_left generate a huge amount of code and fail to |
| // inline; calling them here incurs the cost of all the cases they |
| // handle even though we're rotating a usually-small array by a constant |
| // 1 offset. This swap-based implementation benchmarks much better for |
| // small array lengths in particular. |
| |
| </span><span class="kw">if </span>(<span class="self">self</span>.len <span class="kw">as </span>usize) < A::CAPACITY { |
| <span class="self">self</span>.len += <span class="number">1</span>; |
| } <span class="kw">else </span>{ |
| <span class="kw">return </span><span class="prelude-val">Some</span>(item); |
| } |
| |
| <span class="kw">let </span>target = <span class="kw-2">&mut </span><span class="self">self</span>.as_mut_slice()[index..]; |
| <span class="kw">for </span>i <span class="kw">in </span><span class="number">0</span>..target.len() { |
| core::mem::swap(<span class="kw-2">&mut </span>item, <span class="kw-2">&mut </span>target[i]); |
| } |
| <span class="kw">return </span><span class="prelude-val">None</span>; |
| } |
| |
| <span class="doccomment">/// Checks if the length is 0. |
| </span><span class="attribute">#[inline(always)] |
| #[must_use] |
| </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">/// The length of the `ArrayVec` (in elements). |
| </span><span class="attribute">#[inline(always)] |
| #[must_use] |
| </span><span class="kw">pub fn </span>len(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="self">self</span>.len <span class="kw">as </span>usize |
| } |
| |
| <span class="doccomment">/// Makes a new, empty `ArrayVec`. |
| </span><span class="attribute">#[inline(always)] |
| #[must_use] |
| </span><span class="kw">pub fn </span>new() -> <span class="self">Self </span>{ |
| <span class="self">Self</span>::default() |
| } |
| |
| <span class="doccomment">/// Remove and return the last element of the vec, if there is one. |
| /// |
| /// ## Failure |
| /// * If the vec is empty you get `None`. |
| /// |
| /// ## Example |
| /// ```rust |
| /// # use tinyvec::*; |
| /// let mut av = array_vec!([i32; 10] => 1, 2); |
| /// assert_eq!(av.pop(), Some(2)); |
| /// assert_eq!(av.pop(), Some(1)); |
| /// assert_eq!(av.pop(), None); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| </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><A::Item> { |
| <span class="kw">if </span><span class="self">self</span>.len > <span class="number">0 </span>{ |
| <span class="self">self</span>.len -= <span class="number">1</span>; |
| <span class="kw">let </span>out = take(<span class="kw-2">&mut </span><span class="self">self</span>.data.as_slice_mut()[<span class="self">self</span>.len <span class="kw">as </span>usize]); |
| <span class="prelude-val">Some</span>(out) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">None |
| </span>} |
| } |
| |
| <span class="doccomment">/// Place an element onto the end of the vec. |
| /// |
| /// ## Panics |
| /// * If the length of the vec would overflow the capacity. |
| /// |
| /// ## Example |
| /// ```rust |
| /// # use tinyvec::*; |
| /// let mut av = array_vec!([i32; 2]); |
| /// assert_eq!(&av[..], []); |
| /// av.push(1); |
| /// assert_eq!(&av[..], [1]); |
| /// av.push(2); |
| /// assert_eq!(&av[..], [1, 2]); |
| /// // av.push(3); this would overflow the ArrayVec and panic! |
| /// ``` |
| </span><span class="attribute">#[inline(always)] |
| </span><span class="kw">pub fn </span>push(<span class="kw-2">&mut </span><span class="self">self</span>, val: A::Item) { |
| <span class="kw">let </span>x = <span class="self">self</span>.try_push(val); |
| <span class="macro">assert!</span>(x.is_none(), <span class="string">"ArrayVec::push> capacity overflow!"</span>); |
| } |
| |
| <span class="doccomment">/// Tries to place an element onto the end of the vec.\ |
| /// Returns back the element if the capacity is exhausted, |
| /// otherwise returns None. |
| /// ```rust |
| /// # use tinyvec::*; |
| /// let mut av = array_vec!([i32; 2]); |
| /// assert_eq!(av.as_slice(), []); |
| /// assert_eq!(av.try_push(1), None); |
| /// assert_eq!(&av[..], [1]); |
| /// assert_eq!(av.try_push(2), None); |
| /// assert_eq!(&av[..], [1, 2]); |
| /// assert_eq!(av.try_push(3), Some(3)); |
| /// ``` |
| </span><span class="attribute">#[inline(always)] |
| </span><span class="kw">pub fn </span>try_push(<span class="kw-2">&mut </span><span class="self">self</span>, val: A::Item) -> <span class="prelude-ty">Option</span><A::Item> { |
| <span class="macro">debug_assert!</span>(<span class="self">self</span>.len <span class="kw">as </span>usize <= A::CAPACITY); |
| |
| <span class="kw">let </span>itemref = <span class="kw">match </span><span class="self">self</span>.data.as_slice_mut().get_mut(<span class="self">self</span>.len <span class="kw">as </span>usize) { |
| <span class="prelude-val">None </span>=> <span class="kw">return </span><span class="prelude-val">Some</span>(val), |
| <span class="prelude-val">Some</span>(x) => x, |
| }; |
| |
| <span class="kw-2">*</span>itemref = val; |
| <span class="self">self</span>.len += <span class="number">1</span>; |
| <span class="kw">return </span><span class="prelude-val">None</span>; |
| } |
| |
| <span class="doccomment">/// Removes the item at `index`, shifting all others down by one index. |
| /// |
| /// Returns the removed element. |
| /// |
| /// ## Panics |
| /// |
| /// * If the index is out of bounds. |
| /// |
| /// ## Example |
| /// |
| /// ```rust |
| /// # use tinyvec::*; |
| /// let mut av = array_vec!([i32; 4] => 1, 2, 3); |
| /// assert_eq!(av.remove(1), 2); |
| /// assert_eq!(&av[..], [1, 3]); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>remove(<span class="kw-2">&mut </span><span class="self">self</span>, index: usize) -> A::Item { |
| <span class="kw">let </span>targets: <span class="kw-2">&mut </span>[A::Item] = <span class="kw-2">&mut </span><span class="self">self</span>.deref_mut()[index..]; |
| <span class="kw">let </span>item = take(<span class="kw-2">&mut </span>targets[<span class="number">0</span>]); |
| |
| <span class="comment">// A previous implementation used rotate_left |
| // rotate_right and rotate_left generate a huge amount of code and fail to |
| // inline; calling them here incurs the cost of all the cases they |
| // handle even though we're rotating a usually-small array by a constant |
| // 1 offset. This swap-based implementation benchmarks much better for |
| // small array lengths in particular. |
| |
| </span><span class="kw">for </span>i <span class="kw">in </span><span class="number">0</span>..targets.len() - <span class="number">1 </span>{ |
| targets.swap(i, i + <span class="number">1</span>); |
| } |
| <span class="self">self</span>.len -= <span class="number">1</span>; |
| item |
| } |
| |
| <span class="doccomment">/// As [`resize_with`](ArrayVec::resize_with) |
| /// and it clones the value as the closure. |
| /// |
| /// ## Example |
| /// |
| /// ```rust |
| /// # use tinyvec::*; |
| /// |
| /// let mut av = array_vec!([&str; 10] => "hello"); |
| /// av.resize(3, "world"); |
| /// assert_eq!(&av[..], ["hello", "world", "world"]); |
| /// |
| /// let mut av = array_vec!([i32; 10] => 1, 2, 3, 4); |
| /// av.resize(2, 0); |
| /// assert_eq!(&av[..], [1, 2]); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>resize(<span class="kw-2">&mut </span><span class="self">self</span>, new_len: usize, new_val: A::Item) |
| <span class="kw">where |
| </span>A::Item: Clone, |
| { |
| <span class="self">self</span>.resize_with(new_len, || new_val.clone()) |
| } |
| |
| <span class="doccomment">/// Resize the vec to the new length. |
| /// |
| /// If it needs to be longer, it's filled with repeated calls to the provided |
| /// function. If it needs to be shorter, it's truncated. |
| /// |
| /// ## Example |
| /// |
| /// ```rust |
| /// # use tinyvec::*; |
| /// |
| /// let mut av = array_vec!([i32; 10] => 1, 2, 3); |
| /// av.resize_with(5, Default::default); |
| /// assert_eq!(&av[..], [1, 2, 3, 0, 0]); |
| /// |
| /// let mut av = array_vec!([i32; 10]); |
| /// let mut p = 1; |
| /// av.resize_with(4, || { |
| /// p *= 2; |
| /// p |
| /// }); |
| /// assert_eq!(&av[..], [2, 4, 8, 16]); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>resize_with<F: FnMut() -> A::Item>( |
| <span class="kw-2">&mut </span><span class="self">self</span>, new_len: usize, <span class="kw-2">mut </span>f: F, |
| ) { |
| <span class="kw">match </span>new_len.checked_sub(<span class="self">self</span>.len <span class="kw">as </span>usize) { |
| <span class="prelude-val">None </span>=> <span class="self">self</span>.truncate(new_len), |
| <span class="prelude-val">Some</span>(new_elements) => { |
| <span class="kw">for _ in </span><span class="number">0</span>..new_elements { |
| <span class="self">self</span>.push(f()); |
| } |
| } |
| } |
| } |
| |
| <span class="doccomment">/// Walk the vec and keep only the elements that pass the predicate given. |
| /// |
| /// ## Example |
| /// |
| /// ```rust |
| /// # use tinyvec::*; |
| /// |
| /// let mut av = array_vec!([i32; 10] => 1, 1, 2, 3, 3, 4); |
| /// av.retain(|&x| x % 2 == 0); |
| /// assert_eq!(&av[..], [2, 4]); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>retain<F: FnMut(<span class="kw-2">&</span>A::Item) -> bool>(<span class="kw-2">&mut </span><span class="self">self</span>, <span class="kw-2">mut </span>acceptable: F) { |
| <span class="comment">// Drop guard to contain exactly the remaining elements when the test |
| // panics. |
| </span><span class="kw">struct </span>JoinOnDrop<<span class="lifetime">'vec</span>, Item> { |
| items: <span class="kw-2">&</span><span class="lifetime">'vec </span><span class="kw-2">mut </span>[Item], |
| done_end: usize, |
| <span class="comment">// Start of tail relative to `done_end`. |
| </span>tail_start: usize, |
| } |
| |
| <span class="kw">impl</span><Item> Drop <span class="kw">for </span>JoinOnDrop<<span class="lifetime">'_</span>, Item> { |
| <span class="kw">fn </span>drop(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="self">self</span>.items[<span class="self">self</span>.done_end..].rotate_left(<span class="self">self</span>.tail_start); |
| } |
| } |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>rest = JoinOnDrop { |
| items: <span class="kw-2">&mut </span><span class="self">self</span>.data.as_slice_mut()[..<span class="self">self</span>.len <span class="kw">as </span>usize], |
| done_end: <span class="number">0</span>, |
| tail_start: <span class="number">0</span>, |
| }; |
| |
| <span class="kw">let </span>len = <span class="self">self</span>.len <span class="kw">as </span>usize; |
| <span class="kw">for </span>idx <span class="kw">in </span><span class="number">0</span>..len { |
| <span class="comment">// Loop start invariant: idx = rest.done_end + rest.tail_start |
| </span><span class="kw">if </span>!acceptable(<span class="kw-2">&</span>rest.items[idx]) { |
| <span class="kw">let _ </span>= take(<span class="kw-2">&mut </span>rest.items[idx]); |
| <span class="self">self</span>.len -= <span class="number">1</span>; |
| rest.tail_start += <span class="number">1</span>; |
| } <span class="kw">else </span>{ |
| rest.items.swap(rest.done_end, idx); |
| rest.done_end += <span class="number">1</span>; |
| } |
| } |
| } |
| |
| <span class="doccomment">/// Forces the length of the vector to `new_len`. |
| /// |
| /// ## Panics |
| /// * If `new_len` is greater than the vec's capacity. |
| /// |
| /// ## Safety |
| /// * This is a fully safe operation! The inactive memory already counts as |
| /// "initialized" by Rust's rules. |
| /// * Other than "the memory is initialized" there are no other guarantees |
| /// regarding what you find in the inactive portion of the vec. |
| </span><span class="attribute">#[inline(always)] |
| </span><span class="kw">pub fn </span>set_len(<span class="kw-2">&mut </span><span class="self">self</span>, new_len: usize) { |
| <span class="kw">if </span>new_len > A::CAPACITY { |
| <span class="comment">// Note(Lokathor): Technically we don't have to panic here, and we could |
| // just let some other call later on trigger a panic on accident when the |
| // length is wrong. However, it's a lot easier to catch bugs when things |
| // are more "fail-fast". |
| </span><span class="macro">panic!</span>( |
| <span class="string">"ArrayVec::set_len> new length {} exceeds capacity {}"</span>, |
| new_len, |
| A::CAPACITY |
| ) |
| } |
| |
| <span class="kw">let </span>new_len: u16 = new_len |
| .try_into() |
| .expect(<span class="string">"ArrayVec::set_len> new length is not in range 0..=u16::MAX"</span>); |
| <span class="self">self</span>.len = new_len; |
| } |
| |
| <span class="doccomment">/// Splits the collection at the point given. |
| /// |
| /// * `[0, at)` stays in this vec |
| /// * `[at, len)` ends up in the new vec. |
| /// |
| /// ## Panics |
| /// * if at > len |
| /// |
| /// ## Example |
| /// |
| /// ```rust |
| /// # use tinyvec::*; |
| /// let mut av = array_vec!([i32; 4] => 1, 2, 3); |
| /// let av2 = av.split_off(1); |
| /// assert_eq!(&av[..], [1]); |
| /// assert_eq!(&av2[..], [2, 3]); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| </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="comment">// FIXME: should this just use drain into the output? |
| </span><span class="kw">if </span>at > <span class="self">self</span>.len() { |
| <span class="macro">panic!</span>( |
| <span class="string">"ArrayVec::split_off> at value {} exceeds length of {}"</span>, |
| at, <span class="self">self</span>.len |
| ); |
| } |
| <span class="kw">let </span><span class="kw-2">mut </span>new = <span class="self">Self</span>::default(); |
| <span class="kw">let </span>moves = <span class="kw-2">&mut </span><span class="self">self</span>.as_mut_slice()[at..]; |
| <span class="kw">let </span>split_len = moves.len(); |
| <span class="kw">let </span>targets = <span class="kw-2">&mut </span>new.data.as_slice_mut()[..split_len]; |
| moves.swap_with_slice(targets); |
| |
| <span class="comment">/* moves.len() <= u16::MAX, so these are surely in u16 range */ |
| </span>new.len = split_len <span class="kw">as </span>u16; |
| <span class="self">self</span>.len = at <span class="kw">as </span>u16; |
| new |
| } |
| |
| <span class="doccomment">/// Creates a splicing iterator that removes the specified range in the |
| /// vector, yields the removed items, and replaces them with elements from |
| /// the provided iterator. |
| /// |
| /// `splice` fuses the provided iterator, so elements after the first `None` |
| /// are ignored. |
| /// |
| /// ## Panics |
| /// * If the start is greater than the end. |
| /// * If the end is past the edge of the vec. |
| /// * If the provided iterator panics. |
| /// * If the new length would overflow the capacity of the array. Because |
| /// `ArrayVecSplice` adds elements to this vec in its destructor when |
| /// necessary, this panic would occur when it is dropped. |
| /// |
| /// ## Example |
| /// ```rust |
| /// use tinyvec::*; |
| /// let mut av = array_vec!([i32; 4] => 1, 2, 3); |
| /// let av2: ArrayVec<[i32; 4]> = av.splice(1.., 4..=6).collect(); |
| /// assert_eq!(av.as_slice(), &[1, 4, 5, 6][..]); |
| /// assert_eq!(av2.as_slice(), &[2, 3][..]); |
| /// |
| /// av.splice(.., None); |
| /// assert_eq!(av.as_slice(), &[]); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>splice<R, I>( |
| <span class="kw-2">&mut </span><span class="self">self</span>, range: R, replacement: I, |
| ) -> ArrayVecSplice<<span class="lifetime">'_</span>, A, core::iter::Fuse<I::IntoIter>> |
| <span class="kw">where |
| </span>R: RangeBounds<usize>, |
| I: IntoIterator<Item = A::Item>, |
| { |
| <span class="kw">use </span>core::ops::Bound; |
| <span class="kw">let </span>start = <span class="kw">match </span>range.start_bound() { |
| Bound::Included(x) => <span class="kw-2">*</span>x, |
| Bound::Excluded(x) => x.saturating_add(<span class="number">1</span>), |
| Bound::Unbounded => <span class="number">0</span>, |
| }; |
| <span class="kw">let </span>end = <span class="kw">match </span>range.end_bound() { |
| Bound::Included(x) => x.saturating_add(<span class="number">1</span>), |
| Bound::Excluded(x) => <span class="kw-2">*</span>x, |
| Bound::Unbounded => <span class="self">self</span>.len(), |
| }; |
| <span class="macro">assert!</span>( |
| start <= end, |
| <span class="string">"ArrayVec::splice> Illegal range, {} to {}"</span>, |
| start, |
| end |
| ); |
| <span class="macro">assert!</span>( |
| end <= <span class="self">self</span>.len(), |
| <span class="string">"ArrayVec::splice> Range ends at {} but length is only {}!"</span>, |
| end, |
| <span class="self">self</span>.len() |
| ); |
| |
| ArrayVecSplice { |
| removal_start: start, |
| removal_end: end, |
| parent: <span class="self">self</span>, |
| replacement: replacement.into_iter().fuse(), |
| } |
| } |
| |
| <span class="doccomment">/// Remove an element, swapping the end of the vec into its place. |
| /// |
| /// ## Panics |
| /// * If the index is out of bounds. |
| /// |
| /// ## Example |
| /// ```rust |
| /// # use tinyvec::*; |
| /// let mut av = array_vec!([&str; 4] => "foo", "bar", "quack", "zap"); |
| /// |
| /// assert_eq!(av.swap_remove(1), "bar"); |
| /// assert_eq!(&av[..], ["foo", "zap", "quack"]); |
| /// |
| /// assert_eq!(av.swap_remove(0), "foo"); |
| /// assert_eq!(&av[..], ["quack", "zap"]); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>swap_remove(<span class="kw-2">&mut </span><span class="self">self</span>, index: usize) -> A::Item { |
| <span class="macro">assert!</span>( |
| index < <span class="self">self</span>.len(), |
| <span class="string">"ArrayVec::swap_remove> index {} is out of bounds {}"</span>, |
| index, |
| <span class="self">self</span>.len |
| ); |
| <span class="kw">if </span>index == <span class="self">self</span>.len() - <span class="number">1 </span>{ |
| <span class="self">self</span>.pop().unwrap() |
| } <span class="kw">else </span>{ |
| <span class="kw">let </span>i = <span class="self">self</span>.pop().unwrap(); |
| replace(<span class="kw-2">&mut </span><span class="self">self</span>[index], i) |
| } |
| } |
| |
| <span class="doccomment">/// Reduces the vec's length to the given value. |
| /// |
| /// If the vec is already shorter than the input, nothing happens. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>truncate(<span class="kw-2">&mut </span><span class="self">self</span>, new_len: usize) { |
| <span class="kw">if </span>new_len >= <span class="self">self</span>.len <span class="kw">as </span>usize { |
| <span class="kw">return</span>; |
| } |
| |
| <span class="kw">if </span>needs_drop::<A::Item>() { |
| <span class="kw">let </span>len = <span class="self">self</span>.len <span class="kw">as </span>usize; |
| <span class="self">self</span>.data.as_slice_mut()[new_len..len] |
| .iter_mut() |
| .map(take) |
| .for_each(drop); |
| } |
| |
| <span class="comment">/* new_len is less than self.len */ |
| </span><span class="self">self</span>.len = new_len <span class="kw">as </span>u16; |
| } |
| |
| <span class="doccomment">/// Wraps an array, using the given length as the starting length. |
| /// |
| /// If you want to use the whole length of the array, you can just use the |
| /// `From` impl. |
| /// |
| /// ## Failure |
| /// |
| /// If the given length is greater than the capacity of the array this will |
| /// error, and you'll get the array back in the `Err`. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>try_from_array_len(data: A, len: usize) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>, A> { |
| <span class="comment">/* Note(Soveu): Should we allow A::CAPACITY > u16::MAX for now? */ |
| </span><span class="kw">if </span>len <= A::CAPACITY { |
| <span class="prelude-val">Ok</span>(<span class="self">Self </span>{ data, len: len <span class="kw">as </span>u16 }) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">Err</span>(data) |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><A> ArrayVec<A> { |
| <span class="doccomment">/// Wraps up an array as a new empty `ArrayVec`. |
| /// |
| /// If you want to simply use the full array, use `from` instead. |
| /// |
| /// ## Examples |
| /// |
| /// This method in particular allows to create values for statics: |
| /// |
| /// ```rust |
| /// # use tinyvec::ArrayVec; |
| /// static DATA: ArrayVec<[u8; 5]> = ArrayVec::from_array_empty([0; 5]); |
| /// assert_eq!(DATA.len(), 0); |
| /// ``` |
| /// |
| /// But of course it is just an normal empty `ArrayVec`: |
| /// |
| /// ```rust |
| /// # use tinyvec::ArrayVec; |
| /// let mut data = ArrayVec::from_array_empty([1, 2, 3, 4]); |
| /// assert_eq!(&data[..], &[]); |
| /// data.push(42); |
| /// assert_eq!(&data[..], &[42]); |
| /// ``` |
| </span><span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">pub const fn </span>from_array_empty(data: A) -> <span class="self">Self </span>{ |
| <span class="self">Self </span>{ data, len: <span class="number">0 </span>} |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"grab_spare_slice"</span>)] |
| </span><span class="kw">impl</span><A: Array> ArrayVec<A> { |
| <span class="doccomment">/// Obtain the shared slice of the array _after_ the active memory. |
| /// |
| /// ## Example |
| /// ```rust |
| /// # use tinyvec::*; |
| /// let mut av = array_vec!([i32; 4]); |
| /// assert_eq!(av.grab_spare_slice().len(), 4); |
| /// av.push(10); |
| /// av.push(11); |
| /// av.push(12); |
| /// av.push(13); |
| /// assert_eq!(av.grab_spare_slice().len(), 0); |
| /// ``` |
| </span><span class="attribute">#[inline(always)] |
| </span><span class="kw">pub fn </span>grab_spare_slice(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>[A::Item] { |
| <span class="kw-2">&</span><span class="self">self</span>.data.as_slice()[<span class="self">self</span>.len <span class="kw">as </span>usize..] |
| } |
| |
| <span class="doccomment">/// Obtain the mutable slice of the array _after_ the active memory. |
| /// |
| /// ## Example |
| /// ```rust |
| /// # use tinyvec::*; |
| /// let mut av = array_vec!([i32; 4]); |
| /// assert_eq!(av.grab_spare_slice_mut().len(), 4); |
| /// av.push(10); |
| /// av.push(11); |
| /// assert_eq!(av.grab_spare_slice_mut().len(), 2); |
| /// ``` |
| </span><span class="attribute">#[inline(always)] |
| </span><span class="kw">pub fn </span>grab_spare_slice_mut(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="kw-2">&mut </span>[A::Item] { |
| <span class="kw-2">&mut </span><span class="self">self</span>.data.as_slice_mut()[<span class="self">self</span>.len <span class="kw">as </span>usize..] |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"nightly_slice_partition_dedup"</span>)] |
| </span><span class="kw">impl</span><A: Array> ArrayVec<A> { |
| <span class="doccomment">/// De-duplicates the vec contents. |
| </span><span class="attribute">#[inline(always)] |
| </span><span class="kw">pub fn </span>dedup(<span class="kw-2">&mut </span><span class="self">self</span>) |
| <span class="kw">where |
| </span>A::Item: PartialEq, |
| { |
| <span class="self">self</span>.dedup_by(|a, b| a == b) |
| } |
| |
| <span class="doccomment">/// De-duplicates the vec according to the predicate given. |
| </span><span class="attribute">#[inline(always)] |
| </span><span class="kw">pub fn </span>dedup_by<F>(<span class="kw-2">&mut </span><span class="self">self</span>, same_bucket: F) |
| <span class="kw">where |
| </span>F: FnMut(<span class="kw-2">&mut </span>A::Item, <span class="kw-2">&mut </span>A::Item) -> bool, |
| { |
| <span class="kw">let </span>len = { |
| <span class="kw">let </span>(dedup, <span class="kw">_</span>) = <span class="self">self</span>.as_mut_slice().partition_dedup_by(same_bucket); |
| dedup.len() |
| }; |
| <span class="self">self</span>.truncate(len); |
| } |
| |
| <span class="doccomment">/// De-duplicates the vec according to the key selector given. |
| </span><span class="attribute">#[inline(always)] |
| </span><span class="kw">pub fn </span>dedup_by_key<F, K>(<span class="kw-2">&mut </span><span class="self">self</span>, <span class="kw-2">mut </span>key: F) |
| <span class="kw">where |
| </span>F: FnMut(<span class="kw-2">&mut </span>A::Item) -> K, |
| K: PartialEq, |
| { |
| <span class="self">self</span>.dedup_by(|a, b| key(a) == key(b)) |
| } |
| } |
| |
| <span class="doccomment">/// Splicing iterator for `ArrayVec` |
| /// See [`ArrayVec::splice`](ArrayVec::<A>::splice) |
| </span><span class="kw">pub struct </span>ArrayVecSplice<<span class="lifetime">'p</span>, A: Array, I: Iterator<Item = A::Item>> { |
| parent: <span class="kw-2">&</span><span class="lifetime">'p </span><span class="kw-2">mut </span>ArrayVec<A>, |
| removal_start: usize, |
| removal_end: usize, |
| replacement: I, |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'p</span>, A: Array, I: Iterator<Item = A::Item>> Iterator |
| <span class="kw">for </span>ArrayVecSplice<<span class="lifetime">'p</span>, A, I> |
| { |
| <span class="kw">type </span>Item = A::Item; |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>next(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><A::Item> { |
| <span class="kw">if </span><span class="self">self</span>.removal_start < <span class="self">self</span>.removal_end { |
| <span class="kw">match </span><span class="self">self</span>.replacement.next() { |
| <span class="prelude-val">Some</span>(replacement) => { |
| <span class="kw">let </span>removed = core::mem::replace( |
| <span class="kw-2">&mut </span><span class="self">self</span>.parent[<span class="self">self</span>.removal_start], |
| replacement, |
| ); |
| <span class="self">self</span>.removal_start += <span class="number">1</span>; |
| <span class="prelude-val">Some</span>(removed) |
| } |
| <span class="prelude-val">None </span>=> { |
| <span class="kw">let </span>removed = <span class="self">self</span>.parent.remove(<span class="self">self</span>.removal_start); |
| <span class="self">self</span>.removal_end -= <span class="number">1</span>; |
| <span class="prelude-val">Some</span>(removed) |
| } |
| } |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">None |
| </span>} |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>size_hint(<span class="kw-2">&</span><span class="self">self</span>) -> (usize, <span class="prelude-ty">Option</span><usize>) { |
| <span class="kw">let </span>len = <span class="self">self</span>.len(); |
| (len, <span class="prelude-val">Some</span>(len)) |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'p</span>, A, I> ExactSizeIterator <span class="kw">for </span>ArrayVecSplice<<span class="lifetime">'p</span>, A, I> |
| <span class="kw">where |
| </span>A: Array, |
| I: Iterator<Item = A::Item>, |
| { |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>len(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="self">self</span>.removal_end - <span class="self">self</span>.removal_start |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'p</span>, A, I> FusedIterator <span class="kw">for </span>ArrayVecSplice<<span class="lifetime">'p</span>, A, I> |
| <span class="kw">where |
| </span>A: Array, |
| I: Iterator<Item = A::Item>, |
| { |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'p</span>, A, I> DoubleEndedIterator <span class="kw">for </span>ArrayVecSplice<<span class="lifetime">'p</span>, A, I> |
| <span class="kw">where |
| </span>A: Array, |
| I: Iterator<Item = A::Item> + DoubleEndedIterator, |
| { |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>next_back(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><A::Item> { |
| <span class="kw">if </span><span class="self">self</span>.removal_start < <span class="self">self</span>.removal_end { |
| <span class="kw">match </span><span class="self">self</span>.replacement.next_back() { |
| <span class="prelude-val">Some</span>(replacement) => { |
| <span class="kw">let </span>removed = core::mem::replace( |
| <span class="kw-2">&mut </span><span class="self">self</span>.parent[<span class="self">self</span>.removal_end - <span class="number">1</span>], |
| replacement, |
| ); |
| <span class="self">self</span>.removal_end -= <span class="number">1</span>; |
| <span class="prelude-val">Some</span>(removed) |
| } |
| <span class="prelude-val">None </span>=> { |
| <span class="kw">let </span>removed = <span class="self">self</span>.parent.remove(<span class="self">self</span>.removal_end - <span class="number">1</span>); |
| <span class="self">self</span>.removal_end -= <span class="number">1</span>; |
| <span class="prelude-val">Some</span>(removed) |
| } |
| } |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">None |
| </span>} |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'p</span>, A: Array, I: Iterator<Item = A::Item>> Drop |
| <span class="kw">for </span>ArrayVecSplice<<span class="lifetime">'p</span>, A, I> |
| { |
| <span class="kw">fn </span>drop(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="kw">for _ in </span><span class="self">self</span>.by_ref() {} |
| |
| <span class="comment">// FIXME: reserve lower bound of size_hint |
| |
| </span><span class="kw">for </span>replacement <span class="kw">in </span><span class="self">self</span>.replacement.by_ref() { |
| <span class="self">self</span>.parent.insert(<span class="self">self</span>.removal_end, replacement); |
| <span class="self">self</span>.removal_end += <span class="number">1</span>; |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><A: Array> AsMut<[A::Item]> <span class="kw">for </span>ArrayVec<A> { |
| <span class="attribute">#[inline(always)] |
| #[must_use] |
| </span><span class="kw">fn </span>as_mut(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="kw-2">&mut </span>[A::Item] { |
| <span class="kw-2">&mut *</span><span class="self">self |
| </span>} |
| } |
| |
| <span class="kw">impl</span><A: Array> AsRef<[A::Item]> <span class="kw">for </span>ArrayVec<A> { |
| <span class="attribute">#[inline(always)] |
| #[must_use] |
| </span><span class="kw">fn </span>as_ref(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>[A::Item] { |
| <span class="kw-2">&*</span><span class="self">self |
| </span>} |
| } |
| |
| <span class="kw">impl</span><A: Array> Borrow<[A::Item]> <span class="kw">for </span>ArrayVec<A> { |
| <span class="attribute">#[inline(always)] |
| #[must_use] |
| </span><span class="kw">fn </span>borrow(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>[A::Item] { |
| <span class="kw-2">&*</span><span class="self">self |
| </span>} |
| } |
| |
| <span class="kw">impl</span><A: Array> BorrowMut<[A::Item]> <span class="kw">for </span>ArrayVec<A> { |
| <span class="attribute">#[inline(always)] |
| #[must_use] |
| </span><span class="kw">fn </span>borrow_mut(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="kw-2">&mut </span>[A::Item] { |
| <span class="kw-2">&mut *</span><span class="self">self |
| </span>} |
| } |
| |
| <span class="kw">impl</span><A: Array> Extend<A::Item> <span class="kw">for </span>ArrayVec<A> { |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>extend<T: IntoIterator<Item = A::Item>>(<span class="kw-2">&mut </span><span class="self">self</span>, iter: T) { |
| <span class="kw">for </span>t <span class="kw">in </span>iter { |
| <span class="self">self</span>.push(t) |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><A: Array> From<A> <span class="kw">for </span>ArrayVec<A> { |
| <span class="attribute">#[inline(always)] |
| #[must_use] |
| </span><span class="doccomment">/// The output has a length equal to the full array. |
| /// |
| /// If you want to select a length, use |
| /// [`from_array_len`](ArrayVec::from_array_len) |
| </span><span class="kw">fn </span>from(data: A) -> <span class="self">Self </span>{ |
| <span class="kw">let </span>len: u16 = data |
| .as_slice() |
| .len() |
| .try_into() |
| .expect(<span class="string">"ArrayVec::from> length must be in range 0..=u16::MAX"</span>); |
| <span class="self">Self </span>{ len, data } |
| } |
| } |
| |
| <span class="doccomment">/// The error type returned when a conversion from a slice to an [`ArrayVec`] |
| /// fails. |
| </span><span class="attribute">#[derive(Debug, Copy, Clone)] |
| </span><span class="kw">pub struct </span>TryFromSliceError(()); |
| |
| <span class="kw">impl </span>core::fmt::Display <span class="kw">for </span>TryFromSliceError { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>Formatter<<span class="lifetime">'_</span>>) -> core::fmt::Result { |
| f.write_str(<span class="string">"could not convert slice to ArrayVec"</span>) |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"std"</span>)] |
| </span><span class="kw">impl </span>std::error::Error <span class="kw">for </span>TryFromSliceError {} |
| |
| <span class="kw">impl</span><T, A> TryFrom<<span class="kw-2">&</span><span class="lifetime">'_ </span>[T]> <span class="kw">for </span>ArrayVec<A> |
| <span class="kw">where |
| </span>T: Clone + Default, |
| A: Array<Item = T>, |
| { |
| <span class="kw">type </span>Error = TryFromSliceError; |
| |
| <span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="doccomment">/// The output has a length equal to that of the slice, with the same capacity |
| /// as `A`. |
| </span><span class="kw">fn </span>try_from(slice: <span class="kw-2">&</span>[T]) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>, <span class="self">Self</span>::Error> { |
| <span class="kw">if </span>slice.len() > A::CAPACITY { |
| <span class="prelude-val">Err</span>(TryFromSliceError(())) |
| } <span class="kw">else </span>{ |
| <span class="kw">let </span><span class="kw-2">mut </span>arr = ArrayVec::new(); |
| <span class="comment">// We do not use ArrayVec::extend_from_slice, because it looks like LLVM |
| // fails to deduplicate all the length-checking logic between the |
| // above if and the contents of that method, thus producing much |
| // slower code. Unlike many of the other optimizations in this |
| // crate, this one is worth keeping an eye on. I see no reason, for |
| // any element type, that these should produce different code. But |
| // they do. (rustc 1.51.0) |
| </span>arr.set_len(slice.len()); |
| arr.as_mut_slice().clone_from_slice(slice); |
| <span class="prelude-val">Ok</span>(arr) |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><A: Array> FromIterator<A::Item> <span class="kw">for </span>ArrayVec<A> { |
| <span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">fn </span>from_iter<T: IntoIterator<Item = A::Item>>(iter: T) -> <span class="self">Self </span>{ |
| <span class="kw">let </span><span class="kw-2">mut </span>av = <span class="self">Self</span>::default(); |
| <span class="kw">for </span>i <span class="kw">in </span>iter { |
| av.push(i) |
| } |
| av |
| } |
| } |
| |
| <span class="doccomment">/// Iterator for consuming an `ArrayVec` and returning owned elements. |
| </span><span class="kw">pub struct </span>ArrayVecIterator<A: Array> { |
| base: u16, |
| tail: u16, |
| data: A, |
| } |
| |
| <span class="kw">impl</span><A: Array> ArrayVecIterator<A> { |
| <span class="doccomment">/// Returns the remaining items of this iterator as a slice. |
| </span><span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">pub fn </span>as_slice(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>[A::Item] { |
| <span class="kw-2">&</span><span class="self">self</span>.data.as_slice()[<span class="self">self</span>.base <span class="kw">as </span>usize..<span class="self">self</span>.tail <span class="kw">as </span>usize] |
| } |
| } |
| <span class="kw">impl</span><A: Array> FusedIterator <span class="kw">for </span>ArrayVecIterator<A> {} |
| <span class="kw">impl</span><A: Array> Iterator <span class="kw">for </span>ArrayVecIterator<A> { |
| <span class="kw">type </span>Item = A::Item; |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>next(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><<span class="self">Self</span>::Item> { |
| <span class="kw">let </span>slice = |
| <span class="kw-2">&mut </span><span class="self">self</span>.data.as_slice_mut()[<span class="self">self</span>.base <span class="kw">as </span>usize..<span class="self">self</span>.tail <span class="kw">as </span>usize]; |
| <span class="kw">let </span>itemref = slice.first_mut()<span class="question-mark">?</span>; |
| <span class="self">self</span>.base += <span class="number">1</span>; |
| <span class="kw">return </span><span class="prelude-val">Some</span>(take(itemref)); |
| } |
| <span class="attribute">#[inline(always)] |
| #[must_use] |
| </span><span class="kw">fn </span>size_hint(<span class="kw-2">&</span><span class="self">self</span>) -> (usize, <span class="prelude-ty">Option</span><usize>) { |
| <span class="kw">let </span>s = <span class="self">self</span>.tail - <span class="self">self</span>.base; |
| <span class="kw">let </span>s = s <span class="kw">as </span>usize; |
| (s, <span class="prelude-val">Some</span>(s)) |
| } |
| <span class="attribute">#[inline(always)] |
| </span><span class="kw">fn </span>count(<span class="self">self</span>) -> usize { |
| <span class="self">self</span>.size_hint().<span class="number">0 |
| </span>} |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>last(<span class="kw-2">mut </span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><<span class="self">Self</span>::Item> { |
| <span class="self">self</span>.next_back() |
| } |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>nth(<span class="kw-2">&mut </span><span class="self">self</span>, n: usize) -> <span class="prelude-ty">Option</span><A::Item> { |
| <span class="kw">let </span>slice = <span class="kw-2">&mut </span><span class="self">self</span>.data.as_slice_mut(); |
| <span class="kw">let </span>slice = <span class="kw-2">&mut </span>slice[<span class="self">self</span>.base <span class="kw">as </span>usize..<span class="self">self</span>.tail <span class="kw">as </span>usize]; |
| |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(x) = slice.get_mut(n) { |
| <span class="comment">/* n is in range [0 .. self.tail - self.base) so in u16 range */ |
| </span><span class="self">self</span>.base += n <span class="kw">as </span>u16 + <span class="number">1</span>; |
| <span class="kw">return </span><span class="prelude-val">Some</span>(take(x)); |
| } |
| |
| <span class="self">self</span>.base = <span class="self">self</span>.tail; |
| <span class="kw">return </span><span class="prelude-val">None</span>; |
| } |
| } |
| |
| <span class="kw">impl</span><A: Array> DoubleEndedIterator <span class="kw">for </span>ArrayVecIterator<A> { |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>next_back(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><<span class="self">Self</span>::Item> { |
| <span class="kw">let </span>slice = |
| <span class="kw-2">&mut </span><span class="self">self</span>.data.as_slice_mut()[<span class="self">self</span>.base <span class="kw">as </span>usize..<span class="self">self</span>.tail <span class="kw">as </span>usize]; |
| <span class="kw">let </span>item = slice.last_mut()<span class="question-mark">?</span>; |
| <span class="self">self</span>.tail -= <span class="number">1</span>; |
| <span class="kw">return </span><span class="prelude-val">Some</span>(take(item)); |
| } |
| <span class="attribute">#[cfg(feature = <span class="string">"rustc_1_40"</span>)] |
| #[inline] |
| </span><span class="kw">fn </span>nth_back(<span class="kw-2">&mut </span><span class="self">self</span>, n: usize) -> <span class="prelude-ty">Option</span><<span class="self">Self</span>::Item> { |
| <span class="kw">let </span>base = <span class="self">self</span>.base <span class="kw">as </span>usize; |
| <span class="kw">let </span>tail = <span class="self">self</span>.tail <span class="kw">as </span>usize; |
| <span class="kw">let </span>slice = <span class="kw-2">&mut </span><span class="self">self</span>.data.as_slice_mut()[base..tail]; |
| <span class="kw">let </span>n = n.saturating_add(<span class="number">1</span>); |
| |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(n) = slice.len().checked_sub(n) { |
| <span class="kw">let </span>item = <span class="kw-2">&mut </span>slice[n]; |
| <span class="comment">/* n is in [0..self.tail - self.base] range, so in u16 range */ |
| </span><span class="self">self</span>.tail = <span class="self">self</span>.base + n <span class="kw">as </span>u16; |
| <span class="kw">return </span><span class="prelude-val">Some</span>(take(item)); |
| } |
| |
| <span class="self">self</span>.tail = <span class="self">self</span>.base; |
| <span class="kw">return </span><span class="prelude-val">None</span>; |
| } |
| } |
| |
| <span class="kw">impl</span><A: Array> Debug <span class="kw">for </span>ArrayVecIterator<A> |
| <span class="kw">where |
| </span>A::Item: Debug, |
| { |
| <span class="attribute">#[allow(clippy::missing_inline_in_public_items)] |
| </span><span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>Formatter<<span class="lifetime">'_</span>>) -> core::fmt::Result { |
| f.debug_tuple(<span class="string">"ArrayVecIterator"</span>).field(<span class="kw-2">&</span><span class="self">self</span>.as_slice()).finish() |
| } |
| } |
| |
| <span class="kw">impl</span><A: Array> IntoIterator <span class="kw">for </span>ArrayVec<A> { |
| <span class="kw">type </span>Item = A::Item; |
| <span class="kw">type </span>IntoIter = ArrayVecIterator<A>; |
| <span class="attribute">#[inline(always)] |
| #[must_use] |
| </span><span class="kw">fn </span>into_iter(<span class="self">self</span>) -> <span class="self">Self</span>::IntoIter { |
| ArrayVecIterator { base: <span class="number">0</span>, tail: <span class="self">self</span>.len, data: <span class="self">self</span>.data } |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>, A: Array> IntoIterator <span class="kw">for </span><span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>ArrayVec<A> { |
| <span class="kw">type </span>Item = <span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>A::Item; |
| <span class="kw">type </span>IntoIter = core::slice::IterMut<<span class="lifetime">'a</span>, A::Item>; |
| <span class="attribute">#[inline(always)] |
| #[must_use] |
| </span><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><<span class="lifetime">'a</span>, A: Array> IntoIterator <span class="kw">for </span><span class="kw-2">&</span><span class="lifetime">'a </span>ArrayVec<A> { |
| <span class="kw">type </span>Item = <span class="kw-2">&</span><span class="lifetime">'a </span>A::Item; |
| <span class="kw">type </span>IntoIter = core::slice::Iter<<span class="lifetime">'a</span>, A::Item>; |
| <span class="attribute">#[inline(always)] |
| #[must_use] |
| </span><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><A: Array> PartialEq <span class="kw">for </span>ArrayVec<A> |
| <span class="kw">where |
| </span>A::Item: PartialEq, |
| { |
| <span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">fn </span>eq(<span class="kw-2">&</span><span class="self">self</span>, other: <span class="kw-2">&</span><span class="self">Self</span>) -> bool { |
| <span class="self">self</span>.as_slice().eq(other.as_slice()) |
| } |
| } |
| <span class="kw">impl</span><A: Array> Eq <span class="kw">for </span>ArrayVec<A> <span class="kw">where </span>A::Item: Eq {} |
| |
| <span class="kw">impl</span><A: Array> PartialOrd <span class="kw">for </span>ArrayVec<A> |
| <span class="kw">where |
| </span>A::Item: PartialOrd, |
| { |
| <span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">fn </span>partial_cmp(<span class="kw-2">&</span><span class="self">self</span>, other: <span class="kw-2">&</span><span class="self">Self</span>) -> <span class="prelude-ty">Option</span><core::cmp::Ordering> { |
| <span class="self">self</span>.as_slice().partial_cmp(other.as_slice()) |
| } |
| } |
| <span class="kw">impl</span><A: Array> Ord <span class="kw">for </span>ArrayVec<A> |
| <span class="kw">where |
| </span>A::Item: Ord, |
| { |
| <span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">fn </span>cmp(<span class="kw-2">&</span><span class="self">self</span>, other: <span class="kw-2">&</span><span class="self">Self</span>) -> core::cmp::Ordering { |
| <span class="self">self</span>.as_slice().cmp(other.as_slice()) |
| } |
| } |
| |
| <span class="kw">impl</span><A: Array> PartialEq<<span class="kw-2">&</span>A> <span class="kw">for </span>ArrayVec<A> |
| <span class="kw">where |
| </span>A::Item: PartialEq, |
| { |
| <span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">fn </span>eq(<span class="kw-2">&</span><span class="self">self</span>, other: &&A) -> bool { |
| <span class="self">self</span>.as_slice().eq(other.as_slice()) |
| } |
| } |
| |
| <span class="kw">impl</span><A: Array> PartialEq<<span class="kw-2">&</span>[A::Item]> <span class="kw">for </span>ArrayVec<A> |
| <span class="kw">where |
| </span>A::Item: PartialEq, |
| { |
| <span class="attribute">#[inline] |
| #[must_use] |
| </span><span class="kw">fn </span>eq(<span class="kw-2">&</span><span class="self">self</span>, other: &&[A::Item]) -> bool { |
| <span class="self">self</span>.as_slice().eq(<span class="kw-2">*</span>other) |
| } |
| } |
| |
| <span class="kw">impl</span><A: Array> Hash <span class="kw">for </span>ArrayVec<A> |
| <span class="kw">where |
| </span>A::Item: Hash, |
| { |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>hash<H: Hasher>(<span class="kw-2">&</span><span class="self">self</span>, state: <span class="kw-2">&mut </span>H) { |
| <span class="self">self</span>.as_slice().hash(state) |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"experimental_write_impl"</span>)] |
| </span><span class="kw">impl</span><A: Array<Item = u8>> core::fmt::Write <span class="kw">for </span>ArrayVec<A> { |
| <span class="kw">fn </span>write_str(<span class="kw-2">&mut </span><span class="self">self</span>, s: <span class="kw-2">&</span>str) -> core::fmt::Result { |
| <span class="kw">let </span>my_len = <span class="self">self</span>.len(); |
| <span class="kw">let </span>str_len = s.as_bytes().len(); |
| <span class="kw">if </span>my_len + str_len <= A::CAPACITY { |
| <span class="kw">let </span>remainder = <span class="kw-2">&mut </span><span class="self">self</span>.data.as_slice_mut()[my_len..]; |
| <span class="kw">let </span>target = <span class="kw-2">&mut </span>remainder[..str_len]; |
| target.copy_from_slice(s.as_bytes()); |
| <span class="prelude-val">Ok</span>(()) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">Err</span>(core::fmt::Error) |
| } |
| } |
| } |
| |
| <span class="comment">// // // // // // // // |
| // Formatting impls |
| // // // // // // // // |
| |
| </span><span class="kw">impl</span><A: Array> Binary <span class="kw">for </span>ArrayVec<A> |
| <span class="kw">where |
| </span>A::Item: Binary, |
| { |
| <span class="attribute">#[allow(clippy::missing_inline_in_public_items)] |
| </span><span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>Formatter) -> core::fmt::Result { |
| <span class="macro">write!</span>(f, <span class="string">"["</span>)<span class="question-mark">?</span>; |
| <span class="kw">if </span>f.alternate() { |
| <span class="macro">write!</span>(f, <span class="string">"\n "</span>)<span class="question-mark">?</span>; |
| } |
| <span class="kw">for </span>(i, elem) <span class="kw">in </span><span class="self">self</span>.iter().enumerate() { |
| <span class="kw">if </span>i > <span class="number">0 </span>{ |
| <span class="macro">write!</span>(f, <span class="string">",{}"</span>, <span class="kw">if </span>f.alternate() { <span class="string">"\n " </span>} <span class="kw">else </span>{ <span class="string">" " </span>})<span class="question-mark">?</span>; |
| } |
| Binary::fmt(elem, f)<span class="question-mark">?</span>; |
| } |
| <span class="kw">if </span>f.alternate() { |
| <span class="macro">write!</span>(f, <span class="string">",\n"</span>)<span class="question-mark">?</span>; |
| } |
| <span class="macro">write!</span>(f, <span class="string">"]"</span>) |
| } |
| } |
| |
| <span class="kw">impl</span><A: Array> Debug <span class="kw">for </span>ArrayVec<A> |
| <span class="kw">where |
| </span>A::Item: Debug, |
| { |
| <span class="attribute">#[allow(clippy::missing_inline_in_public_items)] |
| </span><span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>Formatter) -> core::fmt::Result { |
| <span class="macro">write!</span>(f, <span class="string">"["</span>)<span class="question-mark">?</span>; |
| <span class="kw">if </span>f.alternate() { |
| <span class="macro">write!</span>(f, <span class="string">"\n "</span>)<span class="question-mark">?</span>; |
| } |
| <span class="kw">for </span>(i, elem) <span class="kw">in </span><span class="self">self</span>.iter().enumerate() { |
| <span class="kw">if </span>i > <span class="number">0 </span>{ |
| <span class="macro">write!</span>(f, <span class="string">",{}"</span>, <span class="kw">if </span>f.alternate() { <span class="string">"\n " </span>} <span class="kw">else </span>{ <span class="string">" " </span>})<span class="question-mark">?</span>; |
| } |
| Debug::fmt(elem, f)<span class="question-mark">?</span>; |
| } |
| <span class="kw">if </span>f.alternate() { |
| <span class="macro">write!</span>(f, <span class="string">",\n"</span>)<span class="question-mark">?</span>; |
| } |
| <span class="macro">write!</span>(f, <span class="string">"]"</span>) |
| } |
| } |
| |
| <span class="kw">impl</span><A: Array> Display <span class="kw">for </span>ArrayVec<A> |
| <span class="kw">where |
| </span>A::Item: Display, |
| { |
| <span class="attribute">#[allow(clippy::missing_inline_in_public_items)] |
| </span><span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>Formatter) -> core::fmt::Result { |
| <span class="macro">write!</span>(f, <span class="string">"["</span>)<span class="question-mark">?</span>; |
| <span class="kw">if </span>f.alternate() { |
| <span class="macro">write!</span>(f, <span class="string">"\n "</span>)<span class="question-mark">?</span>; |
| } |
| <span class="kw">for </span>(i, elem) <span class="kw">in </span><span class="self">self</span>.iter().enumerate() { |
| <span class="kw">if </span>i > <span class="number">0 </span>{ |
| <span class="macro">write!</span>(f, <span class="string">",{}"</span>, <span class="kw">if </span>f.alternate() { <span class="string">"\n " </span>} <span class="kw">else </span>{ <span class="string">" " </span>})<span class="question-mark">?</span>; |
| } |
| Display::fmt(elem, f)<span class="question-mark">?</span>; |
| } |
| <span class="kw">if </span>f.alternate() { |
| <span class="macro">write!</span>(f, <span class="string">",\n"</span>)<span class="question-mark">?</span>; |
| } |
| <span class="macro">write!</span>(f, <span class="string">"]"</span>) |
| } |
| } |
| |
| <span class="kw">impl</span><A: Array> LowerExp <span class="kw">for </span>ArrayVec<A> |
| <span class="kw">where |
| </span>A::Item: LowerExp, |
| { |
| <span class="attribute">#[allow(clippy::missing_inline_in_public_items)] |
| </span><span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>Formatter) -> core::fmt::Result { |
| <span class="macro">write!</span>(f, <span class="string">"["</span>)<span class="question-mark">?</span>; |
| <span class="kw">if </span>f.alternate() { |
| <span class="macro">write!</span>(f, <span class="string">"\n "</span>)<span class="question-mark">?</span>; |
| } |
| <span class="kw">for </span>(i, elem) <span class="kw">in </span><span class="self">self</span>.iter().enumerate() { |
| <span class="kw">if </span>i > <span class="number">0 </span>{ |
| <span class="macro">write!</span>(f, <span class="string">",{}"</span>, <span class="kw">if </span>f.alternate() { <span class="string">"\n " </span>} <span class="kw">else </span>{ <span class="string">" " </span>})<span class="question-mark">?</span>; |
| } |
| LowerExp::fmt(elem, f)<span class="question-mark">?</span>; |
| } |
| <span class="kw">if </span>f.alternate() { |
| <span class="macro">write!</span>(f, <span class="string">",\n"</span>)<span class="question-mark">?</span>; |
| } |
| <span class="macro">write!</span>(f, <span class="string">"]"</span>) |
| } |
| } |
| |
| <span class="kw">impl</span><A: Array> LowerHex <span class="kw">for </span>ArrayVec<A> |
| <span class="kw">where |
| </span>A::Item: LowerHex, |
| { |
| <span class="attribute">#[allow(clippy::missing_inline_in_public_items)] |
| </span><span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>Formatter) -> core::fmt::Result { |
| <span class="macro">write!</span>(f, <span class="string">"["</span>)<span class="question-mark">?</span>; |
| <span class="kw">if </span>f.alternate() { |
| <span class="macro">write!</span>(f, <span class="string">"\n "</span>)<span class="question-mark">?</span>; |
| } |
| <span class="kw">for </span>(i, elem) <span class="kw">in </span><span class="self">self</span>.iter().enumerate() { |
| <span class="kw">if </span>i > <span class="number">0 </span>{ |
| <span class="macro">write!</span>(f, <span class="string">",{}"</span>, <span class="kw">if </span>f.alternate() { <span class="string">"\n " </span>} <span class="kw">else </span>{ <span class="string">" " </span>})<span class="question-mark">?</span>; |
| } |
| LowerHex::fmt(elem, f)<span class="question-mark">?</span>; |
| } |
| <span class="kw">if </span>f.alternate() { |
| <span class="macro">write!</span>(f, <span class="string">",\n"</span>)<span class="question-mark">?</span>; |
| } |
| <span class="macro">write!</span>(f, <span class="string">"]"</span>) |
| } |
| } |
| |
| <span class="kw">impl</span><A: Array> Octal <span class="kw">for </span>ArrayVec<A> |
| <span class="kw">where |
| </span>A::Item: Octal, |
| { |
| <span class="attribute">#[allow(clippy::missing_inline_in_public_items)] |
| </span><span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>Formatter) -> core::fmt::Result { |
| <span class="macro">write!</span>(f, <span class="string">"["</span>)<span class="question-mark">?</span>; |
| <span class="kw">if </span>f.alternate() { |
| <span class="macro">write!</span>(f, <span class="string">"\n "</span>)<span class="question-mark">?</span>; |
| } |
| <span class="kw">for </span>(i, elem) <span class="kw">in </span><span class="self">self</span>.iter().enumerate() { |
| <span class="kw">if </span>i > <span class="number">0 </span>{ |
| <span class="macro">write!</span>(f, <span class="string">",{}"</span>, <span class="kw">if </span>f.alternate() { <span class="string">"\n " </span>} <span class="kw">else </span>{ <span class="string">" " </span>})<span class="question-mark">?</span>; |
| } |
| Octal::fmt(elem, f)<span class="question-mark">?</span>; |
| } |
| <span class="kw">if </span>f.alternate() { |
| <span class="macro">write!</span>(f, <span class="string">",\n"</span>)<span class="question-mark">?</span>; |
| } |
| <span class="macro">write!</span>(f, <span class="string">"]"</span>) |
| } |
| } |
| |
| <span class="kw">impl</span><A: Array> Pointer <span class="kw">for </span>ArrayVec<A> |
| <span class="kw">where |
| </span>A::Item: Pointer, |
| { |
| <span class="attribute">#[allow(clippy::missing_inline_in_public_items)] |
| </span><span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>Formatter) -> core::fmt::Result { |
| <span class="macro">write!</span>(f, <span class="string">"["</span>)<span class="question-mark">?</span>; |
| <span class="kw">if </span>f.alternate() { |
| <span class="macro">write!</span>(f, <span class="string">"\n "</span>)<span class="question-mark">?</span>; |
| } |
| <span class="kw">for </span>(i, elem) <span class="kw">in </span><span class="self">self</span>.iter().enumerate() { |
| <span class="kw">if </span>i > <span class="number">0 </span>{ |
| <span class="macro">write!</span>(f, <span class="string">",{}"</span>, <span class="kw">if </span>f.alternate() { <span class="string">"\n " </span>} <span class="kw">else </span>{ <span class="string">" " </span>})<span class="question-mark">?</span>; |
| } |
| Pointer::fmt(elem, f)<span class="question-mark">?</span>; |
| } |
| <span class="kw">if </span>f.alternate() { |
| <span class="macro">write!</span>(f, <span class="string">",\n"</span>)<span class="question-mark">?</span>; |
| } |
| <span class="macro">write!</span>(f, <span class="string">"]"</span>) |
| } |
| } |
| |
| <span class="kw">impl</span><A: Array> UpperExp <span class="kw">for </span>ArrayVec<A> |
| <span class="kw">where |
| </span>A::Item: UpperExp, |
| { |
| <span class="attribute">#[allow(clippy::missing_inline_in_public_items)] |
| </span><span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>Formatter) -> core::fmt::Result { |
| <span class="macro">write!</span>(f, <span class="string">"["</span>)<span class="question-mark">?</span>; |
| <span class="kw">if </span>f.alternate() { |
| <span class="macro">write!</span>(f, <span class="string">"\n "</span>)<span class="question-mark">?</span>; |
| } |
| <span class="kw">for </span>(i, elem) <span class="kw">in </span><span class="self">self</span>.iter().enumerate() { |
| <span class="kw">if </span>i > <span class="number">0 </span>{ |
| <span class="macro">write!</span>(f, <span class="string">",{}"</span>, <span class="kw">if </span>f.alternate() { <span class="string">"\n " </span>} <span class="kw">else </span>{ <span class="string">" " </span>})<span class="question-mark">?</span>; |
| } |
| UpperExp::fmt(elem, f)<span class="question-mark">?</span>; |
| } |
| <span class="kw">if </span>f.alternate() { |
| <span class="macro">write!</span>(f, <span class="string">",\n"</span>)<span class="question-mark">?</span>; |
| } |
| <span class="macro">write!</span>(f, <span class="string">"]"</span>) |
| } |
| } |
| |
| <span class="kw">impl</span><A: Array> UpperHex <span class="kw">for </span>ArrayVec<A> |
| <span class="kw">where |
| </span>A::Item: UpperHex, |
| { |
| <span class="attribute">#[allow(clippy::missing_inline_in_public_items)] |
| </span><span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>Formatter) -> core::fmt::Result { |
| <span class="macro">write!</span>(f, <span class="string">"["</span>)<span class="question-mark">?</span>; |
| <span class="kw">if </span>f.alternate() { |
| <span class="macro">write!</span>(f, <span class="string">"\n "</span>)<span class="question-mark">?</span>; |
| } |
| <span class="kw">for </span>(i, elem) <span class="kw">in </span><span class="self">self</span>.iter().enumerate() { |
| <span class="kw">if </span>i > <span class="number">0 </span>{ |
| <span class="macro">write!</span>(f, <span class="string">",{}"</span>, <span class="kw">if </span>f.alternate() { <span class="string">"\n " </span>} <span class="kw">else </span>{ <span class="string">" " </span>})<span class="question-mark">?</span>; |
| } |
| UpperHex::fmt(elem, f)<span class="question-mark">?</span>; |
| } |
| <span class="kw">if </span>f.alternate() { |
| <span class="macro">write!</span>(f, <span class="string">",\n"</span>)<span class="question-mark">?</span>; |
| } |
| <span class="macro">write!</span>(f, <span class="string">"]"</span>) |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"alloc"</span>)] |
| </span><span class="kw">use </span>alloc::vec::Vec; |
| |
| <span class="attribute">#[cfg(all(feature = <span class="string">"alloc"</span>, feature = <span class="string">"rustc_1_57"</span>))] |
| </span><span class="kw">use </span>alloc::collections::TryReserveError; |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"alloc"</span>)] |
| </span><span class="kw">impl</span><A: Array> ArrayVec<A> { |
| <span class="doccomment">/// Drains all elements to a Vec, but reserves additional space |
| /// ``` |
| /// # use tinyvec::*; |
| /// let mut av = array_vec!([i32; 7] => 1, 2, 3); |
| /// let v = av.drain_to_vec_and_reserve(10); |
| /// assert_eq!(v, &[1, 2, 3]); |
| /// assert_eq!(v.capacity(), 13); |
| /// ``` |
| </span><span class="kw">pub fn </span>drain_to_vec_and_reserve(<span class="kw-2">&mut </span><span class="self">self</span>, n: usize) -> Vec<A::Item> { |
| <span class="kw">let </span>cap = n + <span class="self">self</span>.len(); |
| <span class="kw">let </span><span class="kw-2">mut </span>v = Vec::with_capacity(cap); |
| <span class="kw">let </span>iter = <span class="self">self</span>.iter_mut().map(take); |
| v.extend(iter); |
| <span class="self">self</span>.set_len(<span class="number">0</span>); |
| <span class="kw">return </span>v; |
| } |
| |
| <span class="doccomment">/// Tries to drain all elements to a Vec, but reserves additional space. |
| /// |
| /// # Errors |
| /// |
| /// If the allocator reports a failure, then an error is returned. |
| /// |
| /// ``` |
| /// # use tinyvec::*; |
| /// let mut av = array_vec!([i32; 7] => 1, 2, 3); |
| /// let v = av.try_drain_to_vec_and_reserve(10); |
| /// assert!(matches!(v, Ok(_))); |
| /// let v = v.unwrap(); |
| /// assert_eq!(v, &[1, 2, 3]); |
| /// assert_eq!(v.capacity(), 13); |
| /// ``` |
| </span><span class="attribute">#[cfg(feature = <span class="string">"rustc_1_57"</span>)] |
| </span><span class="kw">pub fn </span>try_drain_to_vec_and_reserve( |
| <span class="kw-2">&mut </span><span class="self">self</span>, n: usize, |
| ) -> <span class="prelude-ty">Result</span><Vec<A::Item>, TryReserveError> { |
| <span class="kw">let </span>cap = n + <span class="self">self</span>.len(); |
| <span class="kw">let </span><span class="kw-2">mut </span>v = Vec::new(); |
| v.try_reserve(cap)<span class="question-mark">?</span>; |
| <span class="kw">let </span>iter = <span class="self">self</span>.iter_mut().map(take); |
| v.extend(iter); |
| <span class="self">self</span>.set_len(<span class="number">0</span>); |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(v); |
| } |
| |
| <span class="doccomment">/// Drains all elements to a Vec |
| /// ``` |
| /// # use tinyvec::*; |
| /// let mut av = array_vec!([i32; 7] => 1, 2, 3); |
| /// let v = av.drain_to_vec(); |
| /// assert_eq!(v, &[1, 2, 3]); |
| /// assert_eq!(v.capacity(), 3); |
| /// ``` |
| </span><span class="kw">pub fn </span>drain_to_vec(<span class="kw-2">&mut </span><span class="self">self</span>) -> Vec<A::Item> { |
| <span class="self">self</span>.drain_to_vec_and_reserve(<span class="number">0</span>) |
| } |
| |
| <span class="doccomment">/// Tries to drain all elements to a Vec. |
| /// |
| /// # Errors |
| /// |
| /// If the allocator reports a failure, then an error is returned. |
| /// |
| /// ``` |
| /// # use tinyvec::*; |
| /// let mut av = array_vec!([i32; 7] => 1, 2, 3); |
| /// let v = av.try_drain_to_vec(); |
| /// assert!(matches!(v, Ok(_))); |
| /// let v = v.unwrap(); |
| /// assert_eq!(v, &[1, 2, 3]); |
| /// // Vec may reserve more than necessary in order to prevent more future allocations. |
| /// assert!(v.capacity() >= 3); |
| /// ``` |
| </span><span class="attribute">#[cfg(feature = <span class="string">"rustc_1_57"</span>)] |
| </span><span class="kw">pub fn </span>try_drain_to_vec(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Result</span><Vec<A::Item>, TryReserveError> { |
| <span class="self">self</span>.try_drain_to_vec_and_reserve(<span class="number">0</span>) |
| } |
| } |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"serde"</span>)] |
| </span><span class="kw">struct </span>ArrayVecVisitor<A: Array>(PhantomData<A>); |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"serde"</span>)] |
| </span><span class="kw">impl</span><<span class="lifetime">'de</span>, A: Array> Visitor<<span class="lifetime">'de</span>> <span class="kw">for </span>ArrayVecVisitor<A> |
| <span class="kw">where |
| </span>A::Item: Deserialize<<span class="lifetime">'de</span>>, |
| { |
| <span class="kw">type </span>Value = ArrayVec<A>; |
| |
| <span class="kw">fn </span>expecting( |
| <span class="kw-2">&</span><span class="self">self</span>, formatter: <span class="kw-2">&mut </span>core::fmt::Formatter, |
| ) -> core::fmt::Result { |
| formatter.write_str(<span class="string">"a sequence"</span>) |
| } |
| |
| <span class="kw">fn </span>visit_seq<S>(<span class="self">self</span>, <span class="kw-2">mut </span>seq: S) -> <span class="prelude-ty">Result</span><<span class="self">Self</span>::Value, S::Error> |
| <span class="kw">where |
| </span>S: SeqAccess<<span class="lifetime">'de</span>>, |
| { |
| <span class="kw">let </span><span class="kw-2">mut </span>new_arrayvec: ArrayVec<A> = Default::default(); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>idx = <span class="number">0usize</span>; |
| <span class="kw">while let </span><span class="prelude-val">Some</span>(value) = seq.next_element()<span class="question-mark">? </span>{ |
| <span class="kw">if </span>new_arrayvec.len() >= new_arrayvec.capacity() { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(DeserializeError::invalid_length(idx, <span class="kw-2">&</span><span class="self">self</span>)); |
| } |
| new_arrayvec.push(value); |
| idx = idx + <span class="number">1</span>; |
| } |
| |
| <span class="prelude-val">Ok</span>(new_arrayvec) |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="tinyvec" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |