<!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 to the Rust file `/home/eric/.cargo/registry/src/github.com-1ecc6299db9ec823/arrayvec-0.4.9/src/lib.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>lib.rs.html -- source</title><link rel="stylesheet" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css"><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><script src="../../storage.js"></script></head><body class="rustdoc source"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../../theme.js"></script><nav class="sub"><form class="search-form js-only"><div class="search-container"><input class="search-input" name="search" autocomplete="off" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><a id="settings-menu" href="../../settings.html"><img src="../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><pre class="line-numbers"><span id="1"> 1</span>
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</pre><pre class="rust ">
<span class="doccomment">//! **arrayvec** provides the types `ArrayVec` and `ArrayString`: </span>
<span class="doccomment">//! array-backed vector and string types, which store their contents inline.</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! The arrayvec package has the following cargo features:</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! - `std`</span>
<span class="doccomment">//! - Optional, enabled by default</span>
<span class="doccomment">//! - Use libstd; disable to use `no_std` instead.</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! - `serde-1`</span>
<span class="doccomment">//! - Optional</span>
<span class="doccomment">//! - Enable serialization for ArrayVec and ArrayString using serde 1.0</span>
<span class="doccomment">//! - `array-sizes-33-128`, `array-sizes-129-255`</span>
<span class="doccomment">//! - Optional</span>
<span class="doccomment">//! - Enable more array sizes (see [Array] for more information)</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! ## Rust Version</span>
<span class="doccomment">//!</span>
<span class="doccomment">//! This version of arrayvec requires Rust 1.13 or later.</span>
<span class="doccomment">//!</span>
<span class="attribute">#![<span class="ident">doc</span>(<span class="ident">html_root_url</span><span class="op">=</span><span class="string">"https://docs.rs/arrayvec/0.4/"</span>)]</span>
<span class="attribute">#![<span class="ident">cfg_attr</span>(<span class="ident">not</span>(<span class="ident">feature</span><span class="op">=</span><span class="string">"std"</span>), <span class="ident">no_std</span>)]</span>
<span class="attribute">#![<span class="ident">cfg_attr</span>(<span class="ident">has_union_feature</span>, <span class="ident">feature</span>(<span class="ident">untagged_unions</span>))]</span>
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span><span class="op">=</span><span class="string">"serde-1"</span>)]</span>
<span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">serde</span>;
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">feature</span><span class="op">=</span><span class="string">"std"</span>))]</span>
<span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">core</span> <span class="kw">as</span> <span class="ident">std</span>;
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">has_manually_drop_in_union</span>))]</span>
<span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">nodrop</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">cmp</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">iter</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">mem</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">ptr</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">ops</span>::{
<span class="ident">Deref</span>,
<span class="ident">DerefMut</span>,
};
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">slice</span>;
<span class="comment">// extra traits</span>
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">borrow</span>::{<span class="ident">Borrow</span>, <span class="ident">BorrowMut</span>};
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">hash</span>::{<span class="ident">Hash</span>, <span class="ident">Hasher</span>};
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fmt</span>;
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span><span class="op">=</span><span class="string">"std"</span>)]</span>
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">io</span>;
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">has_manually_drop_in_union</span>)]</span>
<span class="kw">mod</span> <span class="ident">maybe_uninit</span>;
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">not</span>(<span class="ident">has_manually_drop_in_union</span>))]</span>
<span class="attribute">#[<span class="ident">path</span><span class="op">=</span><span class="string">"maybe_uninit_nodrop.rs"</span>]</span>
<span class="kw">mod</span> <span class="ident">maybe_uninit</span>;
<span class="kw">use</span> <span class="ident">maybe_uninit</span>::<span class="ident">MaybeUninit</span>;
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span><span class="op">=</span><span class="string">"serde-1"</span>)]</span>
<span class="kw">use</span> <span class="ident">serde</span>::{<span class="ident">Serialize</span>, <span class="ident">Deserialize</span>, <span class="ident">Serializer</span>, <span class="ident">Deserializer</span>};
<span class="kw">mod</span> <span class="ident">array</span>;
<span class="kw">mod</span> <span class="ident">array_string</span>;
<span class="kw">mod</span> <span class="ident">char</span>;
<span class="kw">mod</span> <span class="ident">range</span>;
<span class="kw">mod</span> <span class="ident">errors</span>;
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">array</span>::<span class="ident">Array</span>;
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">range</span>::<span class="ident">RangeArgument</span>;
<span class="kw">use</span> <span class="ident">array</span>::<span class="ident">Index</span>;
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">array_string</span>::<span class="ident">ArrayString</span>;
<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">errors</span>::<span class="ident">CapacityError</span>;
<span class="doccomment">/// A vector with a fixed capacity.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The `ArrayVec` is a vector backed by a fixed size array. It keeps track of</span>
<span class="doccomment">/// the number of initialized elements.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The vector is a contiguous value that you can store directly on the stack</span>
<span class="doccomment">/// if needed.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// It offers a simple API but also dereferences to a slice, so</span>
<span class="doccomment">/// that the full slice API is available.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ArrayVec can be converted into a by value iterator.</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">ArrayVec</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">Array</span><span class="op">></span> {
<span class="ident">xs</span>: <span class="ident">MaybeUninit</span><span class="op"><</span><span class="ident">A</span><span class="op">></span>,
<span class="ident">len</span>: <span class="ident">A</span>::<span class="ident">Index</span>,
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">Array</span><span class="op">></span> <span class="ident">Drop</span> <span class="kw">for</span> <span class="ident">ArrayVec</span><span class="op"><</span><span class="ident">A</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">drop</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) {
<span class="self">self</span>.<span class="ident">clear</span>();
<span class="comment">// NoDrop inhibits array's drop</span>
<span class="comment">// panic safety: NoDrop::drop will trigger on panic, so the inner</span>
<span class="comment">// array will not drop even after panic.</span>
}
}
<span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">panic_oob</span> {
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">method_name</span>:<span class="ident">expr</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">index</span>:<span class="ident">expr</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">len</span>:<span class="ident">expr</span>) <span class="op">=></span> {
<span class="macro">panic</span><span class="macro">!</span>(<span class="macro">concat</span><span class="macro">!</span>(<span class="string">"ArrayVec::"</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">method_name</span>, <span class="string">": index {} is out of bounds in vector of length {}"</span>),
<span class="macro-nonterminal">$</span><span class="macro-nonterminal">index</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">len</span>)
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">Array</span><span class="op">></span> <span class="ident">ArrayVec</span><span class="op"><</span><span class="ident">A</span><span class="op">></span> {
<span class="doccomment">/// Create a new empty `ArrayVec`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Capacity is inferred from the type parameter.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use arrayvec::ArrayVec;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut array = ArrayVec::<[_; 16]>::new();</span>
<span class="doccomment">/// array.push(1);</span>
<span class="doccomment">/// array.push(2);</span>
<span class="doccomment">/// assert_eq!(&array[..], &[1, 2]);</span>
<span class="doccomment">/// assert_eq!(array.capacity(), 16);</span>
<span class="doccomment">/// ```</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>() <span class="op">-></span> <span class="ident">ArrayVec</span><span class="op"><</span><span class="ident">A</span><span class="op">></span> {
<span class="kw">unsafe</span> {
<span class="ident">ArrayVec</span> { <span class="ident">xs</span>: <span class="ident">MaybeUninit</span>::<span class="ident">uninitialized</span>(), <span class="ident">len</span>: <span class="ident">Index</span>::<span class="ident">from</span>(<span class="number">0</span>) }
}
}
<span class="doccomment">/// Return the number of elements in the `ArrayVec`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use arrayvec::ArrayVec;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut array = ArrayVec::from([1, 2, 3]);</span>
<span class="doccomment">/// array.pop();</span>
<span class="doccomment">/// assert_eq!(array.len(), 2);</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">len</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">usize</span> { <span class="self">self</span>.<span class="ident">len</span>.<span class="ident">to_usize</span>() }
<span class="doccomment">/// Return the capacity of the `ArrayVec`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use arrayvec::ArrayVec;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let array = ArrayVec::from([1, 2, 3]);</span>
<span class="doccomment">/// assert_eq!(array.capacity(), 3);</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">capacity</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">usize</span> { <span class="ident">A</span>::<span class="ident">capacity</span>() }
<span class="doccomment">/// Return if the `ArrayVec` is completely filled.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use arrayvec::ArrayVec;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut array = ArrayVec::<[_; 1]>::new();</span>
<span class="doccomment">/// assert!(!array.is_full());</span>
<span class="doccomment">/// array.push(1);</span>
<span class="doccomment">/// assert!(array.is_full());</span>
<span class="doccomment">/// ```</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_full</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> { <span class="self">self</span>.<span class="ident">len</span>() <span class="op">==</span> <span class="self">self</span>.<span class="ident">capacity</span>() }
<span class="doccomment">/// Push `element` to the end of the vector.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ***Panics*** if the vector is already full.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use arrayvec::ArrayVec;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut array = ArrayVec::<[_; 2]>::new();</span>
<span class="doccomment">///</span>
<span class="doccomment">/// array.push(1);</span>
<span class="doccomment">/// array.push(2);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert_eq!(&array[..], &[1, 2]);</span>
<span class="doccomment">/// ```</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">push</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">element</span>: <span class="ident">A</span>::<span class="ident">Item</span>) {
<span class="self">self</span>.<span class="ident">try_push</span>(<span class="ident">element</span>).<span class="ident">unwrap</span>()
}
<span class="doccomment">/// Push `element` to the end of the vector.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Return `Ok` if the push succeeds, or return an error if the vector</span>
<span class="doccomment">/// is already full.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use arrayvec::ArrayVec;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut array = ArrayVec::<[_; 2]>::new();</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let push1 = array.try_push(1);</span>
<span class="doccomment">/// let push2 = array.try_push(2);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert!(push1.is_ok());</span>
<span class="doccomment">/// assert!(push2.is_ok());</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert_eq!(&array[..], &[1, 2]);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let overflow = array.try_push(3);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert!(overflow.is_err());</span>
<span class="doccomment">/// ```</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">try_push</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">element</span>: <span class="ident">A</span>::<span class="ident">Item</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span>(), <span class="ident">CapacityError</span><span class="op"><</span><span class="ident">A</span>::<span class="ident">Item</span><span class="op">>></span> {
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">len</span>() <span class="op"><</span> <span class="ident">A</span>::<span class="ident">capacity</span>() {
<span class="kw">unsafe</span> {
<span class="self">self</span>.<span class="ident">push_unchecked</span>(<span class="ident">element</span>);
}
<span class="prelude-val">Ok</span>(())
} <span class="kw">else</span> {
<span class="prelude-val">Err</span>(<span class="ident">CapacityError</span>::<span class="ident">new</span>(<span class="ident">element</span>))
}
}
<span class="doccomment">/// Push `element` to the end of the vector without checking the capacity.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// It is up to the caller to ensure the capacity of the vector is</span>
<span class="doccomment">/// sufficiently large.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This method uses *debug assertions* to check that the arrayvec is not full.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use arrayvec::ArrayVec;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut array = ArrayVec::<[_; 2]>::new();</span>
<span class="doccomment">///</span>
<span class="doccomment">/// if array.len() + 2 <= array.capacity() {</span>
<span class="doccomment">/// unsafe {</span>
<span class="doccomment">/// array.push_unchecked(1);</span>
<span class="doccomment">/// array.push_unchecked(2);</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// }</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert_eq!(&array[..], &[1, 2]);</span>
<span class="doccomment">/// ```</span>
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">pub</span> <span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">push_unchecked</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">element</span>: <span class="ident">A</span>::<span class="ident">Item</span>) {
<span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">len</span>();
<span class="macro">debug_assert</span><span class="macro">!</span>(<span class="ident">len</span> <span class="op"><</span> <span class="ident">A</span>::<span class="ident">capacity</span>());
<span class="ident">ptr</span>::<span class="ident">write</span>(<span class="self">self</span>.<span class="ident">get_unchecked_mut</span>(<span class="ident">len</span>), <span class="ident">element</span>);
<span class="self">self</span>.<span class="ident">set_len</span>(<span class="ident">len</span> <span class="op">+</span> <span class="number">1</span>);
}
<span class="doccomment">/// Insert `element` at position `index`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Shift up all elements after `index`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// It is an error if the index is greater than the length or if the</span>
<span class="doccomment">/// arrayvec is full.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ***Panics*** if the array is full or the `index` is out of bounds. See</span>
<span class="doccomment">/// `try_insert` for fallible version.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use arrayvec::ArrayVec;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut array = ArrayVec::<[_; 2]>::new();</span>
<span class="doccomment">///</span>
<span class="doccomment">/// array.insert(0, "x");</span>
<span class="doccomment">/// array.insert(0, "y");</span>
<span class="doccomment">/// assert_eq!(&array[..], &["y", "x"]);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">insert</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">index</span>: <span class="ident">usize</span>, <span class="ident">element</span>: <span class="ident">A</span>::<span class="ident">Item</span>) {
<span class="self">self</span>.<span class="ident">try_insert</span>(<span class="ident">index</span>, <span class="ident">element</span>).<span class="ident">unwrap</span>()
}
<span class="doccomment">/// Insert `element` at position `index`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Shift up all elements after `index`; the `index` must be less than</span>
<span class="doccomment">/// or equal to the length.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Returns an error if vector is already at full capacity.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ***Panics*** `index` is out of bounds.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use arrayvec::ArrayVec;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut array = ArrayVec::<[_; 2]>::new();</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert!(array.try_insert(0, "x").is_ok());</span>
<span class="doccomment">/// assert!(array.try_insert(0, "y").is_ok());</span>
<span class="doccomment">/// assert!(array.try_insert(0, "z").is_err());</span>
<span class="doccomment">/// assert_eq!(&array[..], &["y", "x"]);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">try_insert</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">index</span>: <span class="ident">usize</span>, <span class="ident">element</span>: <span class="ident">A</span>::<span class="ident">Item</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span>(), <span class="ident">CapacityError</span><span class="op"><</span><span class="ident">A</span>::<span class="ident">Item</span><span class="op">>></span> {
<span class="kw">if</span> <span class="ident">index</span> <span class="op">></span> <span class="self">self</span>.<span class="ident">len</span>() {
<span class="macro">panic_oob</span><span class="macro">!</span>(<span class="string">"try_insert"</span>, <span class="ident">index</span>, <span class="self">self</span>.<span class="ident">len</span>())
}
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">len</span>() <span class="op">==</span> <span class="self">self</span>.<span class="ident">capacity</span>() {
<span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">CapacityError</span>::<span class="ident">new</span>(<span class="ident">element</span>));
}
<span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">len</span>();
<span class="comment">// follows is just like Vec<T></span>
<span class="kw">unsafe</span> { <span class="comment">// infallible</span>
<span class="comment">// The spot to put the new value</span>
{
<span class="kw">let</span> <span class="ident">p</span>: <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="kw">_</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">get_unchecked_mut</span>(<span class="ident">index</span>);
<span class="comment">// Shift everything over to make space. (Duplicating the</span>
<span class="comment">// `index`th element into two consecutive places.)</span>
<span class="ident">ptr</span>::<span class="ident">copy</span>(<span class="ident">p</span>, <span class="ident">p</span>.<span class="ident">offset</span>(<span class="number">1</span>), <span class="ident">len</span> <span class="op">-</span> <span class="ident">index</span>);
<span class="comment">// Write it in, overwriting the first copy of the `index`th</span>
<span class="comment">// element.</span>
<span class="ident">ptr</span>::<span class="ident">write</span>(<span class="ident">p</span>, <span class="ident">element</span>);
}
<span class="self">self</span>.<span class="ident">set_len</span>(<span class="ident">len</span> <span class="op">+</span> <span class="number">1</span>);
}
<span class="prelude-val">Ok</span>(())
}
<span class="doccomment">/// Remove the last element in the vector and return it.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Return `Some(` *element* `)` if the vector is non-empty, else `None`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use arrayvec::ArrayVec;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut array = ArrayVec::<[_; 2]>::new();</span>
<span class="doccomment">///</span>
<span class="doccomment">/// array.push(1);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert_eq!(array.pop(), Some(1));</span>
<span class="doccomment">/// assert_eq!(array.pop(), None);</span>
<span class="doccomment">/// ```</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">pop</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">A</span>::<span class="ident">Item</span><span class="op">></span> {
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">len</span>() <span class="op">==</span> <span class="number">0</span> {
<span class="kw">return</span> <span class="prelude-val">None</span>
}
<span class="kw">unsafe</span> {
<span class="kw">let</span> <span class="ident">new_len</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">len</span>() <span class="op">-</span> <span class="number">1</span>;
<span class="self">self</span>.<span class="ident">set_len</span>(<span class="ident">new_len</span>);
<span class="prelude-val">Some</span>(<span class="ident">ptr</span>::<span class="ident">read</span>(<span class="self">self</span>.<span class="ident">get_unchecked_mut</span>(<span class="ident">new_len</span>)))
}
}
<span class="doccomment">/// Remove the element at `index` and swap the last element into its place.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This operation is O(1).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Return the *element* if the index is in bounds, else panic.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ***Panics*** if the `index` is out of bounds.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use arrayvec::ArrayVec;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut array = ArrayVec::from([1, 2, 3]);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert_eq!(array.swap_remove(0), 1);</span>
<span class="doccomment">/// assert_eq!(&array[..], &[3, 2]);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert_eq!(array.swap_remove(1), 2);</span>
<span class="doccomment">/// assert_eq!(&array[..], &[3]);</span>
<span class="doccomment">/// ```</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">swap_remove</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">index</span>: <span class="ident">usize</span>) <span class="op">-></span> <span class="ident">A</span>::<span class="ident">Item</span> {
<span class="self">self</span>.<span class="ident">swap_pop</span>(<span class="ident">index</span>)
.<span class="ident">unwrap_or_else</span>(<span class="op">||</span> {
<span class="macro">panic_oob</span><span class="macro">!</span>(<span class="string">"swap_remove"</span>, <span class="ident">index</span>, <span class="self">self</span>.<span class="ident">len</span>())
})
}
<span class="doccomment">/// Remove the element at `index` and swap the last element into its place.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This is a checked version of `.swap_remove`. </span>
<span class="doccomment">/// This operation is O(1).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Return `Some(` *element* `)` if the index is in bounds, else `None`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use arrayvec::ArrayVec;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut array = ArrayVec::from([1, 2, 3]);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert_eq!(array.swap_pop(0), Some(1));</span>
<span class="doccomment">/// assert_eq!(&array[..], &[3, 2]);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert_eq!(array.swap_pop(10), None);</span>
<span class="doccomment">/// ```</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">swap_pop</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">index</span>: <span class="ident">usize</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">A</span>::<span class="ident">Item</span><span class="op">></span> {
<span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">len</span>();
<span class="kw">if</span> <span class="ident">index</span> <span class="op">>=</span> <span class="ident">len</span> {
<span class="kw">return</span> <span class="prelude-val">None</span>;
}
<span class="self">self</span>.<span class="ident">swap</span>(<span class="ident">index</span>, <span class="ident">len</span> <span class="op">-</span> <span class="number">1</span>);
<span class="self">self</span>.<span class="ident">pop</span>()
}
<span class="doccomment">/// Remove the element at `index` and shift down the following elements.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The `index` must be strictly less than the length of the vector.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ***Panics*** if the `index` is out of bounds.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use arrayvec::ArrayVec;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut array = ArrayVec::from([1, 2, 3]);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let removed_elt = array.remove(0);</span>
<span class="doccomment">/// assert_eq!(removed_elt, 1);</span>
<span class="doccomment">/// assert_eq!(&array[..], &[2, 3]);</span>
<span class="doccomment">/// ```</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">remove</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">index</span>: <span class="ident">usize</span>) <span class="op">-></span> <span class="ident">A</span>::<span class="ident">Item</span> {
<span class="self">self</span>.<span class="ident">pop_at</span>(<span class="ident">index</span>)
.<span class="ident">unwrap_or_else</span>(<span class="op">||</span> {
<span class="macro">panic_oob</span><span class="macro">!</span>(<span class="string">"remove"</span>, <span class="ident">index</span>, <span class="self">self</span>.<span class="ident">len</span>())
})
}
<span class="doccomment">/// Remove the element at `index` and shift down the following elements.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This is a checked version of `.remove(index)`. Returns `None` if there</span>
<span class="doccomment">/// is no element at `index`. Otherwise, return the element inside `Some`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use arrayvec::ArrayVec;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut array = ArrayVec::from([1, 2, 3]);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert!(array.pop_at(0).is_some());</span>
<span class="doccomment">/// assert_eq!(&array[..], &[2, 3]);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert!(array.pop_at(2).is_none());</span>
<span class="doccomment">/// assert!(array.pop_at(10).is_none());</span>
<span class="doccomment">/// ```</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">pop_at</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">index</span>: <span class="ident">usize</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">A</span>::<span class="ident">Item</span><span class="op">></span> {
<span class="kw">if</span> <span class="ident">index</span> <span class="op">>=</span> <span class="self">self</span>.<span class="ident">len</span>() {
<span class="prelude-val">None</span>
} <span class="kw">else</span> {
<span class="self">self</span>.<span class="ident">drain</span>(<span class="ident">index</span>..<span class="ident">index</span> <span class="op">+</span> <span class="number">1</span>).<span class="ident">next</span>()
}
}
<span class="doccomment">/// Shortens the vector, keeping the first `len` elements and dropping</span>
<span class="doccomment">/// the rest.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// If `len` is greater than the vector’s current length this has no</span>
<span class="doccomment">/// effect.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use arrayvec::ArrayVec;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut array = ArrayVec::from([1, 2, 3, 4, 5]);</span>
<span class="doccomment">/// array.truncate(3);</span>
<span class="doccomment">/// assert_eq!(&array[..], &[1, 2, 3]);</span>
<span class="doccomment">/// array.truncate(4);</span>
<span class="doccomment">/// assert_eq!(&array[..], &[1, 2, 3]);</span>
<span class="doccomment">/// ```</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">truncate</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">len</span>: <span class="ident">usize</span>) {
<span class="kw">while</span> <span class="self">self</span>.<span class="ident">len</span>() <span class="op">></span> <span class="ident">len</span> { <span class="self">self</span>.<span class="ident">pop</span>(); }
}
<span class="doccomment">/// Remove all elements in the vector.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">clear</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) {
<span class="kw">while</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="kw">_</span>) <span class="op">=</span> <span class="self">self</span>.<span class="ident">pop</span>() { }
}
<span class="doccomment">/// Retains only the elements specified by the predicate.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// In other words, remove all elements `e` such that `f(&mut e)` returns false.</span>
<span class="doccomment">/// This method operates in place and preserves the order of the retained</span>
<span class="doccomment">/// elements.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use arrayvec::ArrayVec;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut array = ArrayVec::from([1, 2, 3, 4]);</span>
<span class="doccomment">/// array.retain(|x| *x & 1 != 0 );</span>
<span class="doccomment">/// assert_eq!(&array[..], &[1, 3]);</span>
<span class="doccomment">/// ```</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">retain</span><span class="op"><</span><span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="kw-2">mut</span> <span class="ident">f</span>: <span class="ident">F</span>)
<span class="kw">where</span> <span class="ident">F</span>: <span class="ident">FnMut</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">A</span>::<span class="ident">Item</span>) <span class="op">-></span> <span class="ident">bool</span>
{
<span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">len</span>();
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">del</span> <span class="op">=</span> <span class="number">0</span>;
{
<span class="kw">let</span> <span class="ident">v</span> <span class="op">=</span> <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="kw-2">*</span><span class="kw-2">*</span><span class="self">self</span>;
<span class="kw">for</span> <span class="ident">i</span> <span class="kw">in</span> <span class="number">0</span>..<span class="ident">len</span> {
<span class="kw">if</span> <span class="op">!</span><span class="ident">f</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">v</span>[<span class="ident">i</span>]) {
<span class="ident">del</span> <span class="op">+=</span> <span class="number">1</span>;
} <span class="kw">else</span> <span class="kw">if</span> <span class="ident">del</span> <span class="op">></span> <span class="number">0</span> {
<span class="ident">v</span>.<span class="ident">swap</span>(<span class="ident">i</span> <span class="op">-</span> <span class="ident">del</span>, <span class="ident">i</span>);
}
}
}
<span class="kw">if</span> <span class="ident">del</span> <span class="op">></span> <span class="number">0</span> {
<span class="self">self</span>.<span class="ident">drain</span>(<span class="ident">len</span> <span class="op">-</span> <span class="ident">del</span>..);
}
}
<span class="doccomment">/// Set the vector’s length without dropping or moving out elements</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This method is `unsafe` because it changes the notion of the</span>
<span class="doccomment">/// number of “valid” elements in the vector. Use with care.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This method uses *debug assertions* to check that check that `length` is</span>
<span class="doccomment">/// not greater than the capacity.</span>
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">pub</span> <span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">set_len</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">length</span>: <span class="ident">usize</span>) {
<span class="macro">debug_assert</span><span class="macro">!</span>(<span class="ident">length</span> <span class="op"><=</span> <span class="self">self</span>.<span class="ident">capacity</span>());
<span class="self">self</span>.<span class="ident">len</span> <span class="op">=</span> <span class="ident">Index</span>::<span class="ident">from</span>(<span class="ident">length</span>);
}
<span class="doccomment">/// Create a draining iterator that removes the specified range in the vector</span>
<span class="doccomment">/// and yields the removed items from start to end. The element range is</span>
<span class="doccomment">/// removed even if the iterator is not consumed until the end.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Note: It is unspecified how many elements are removed from the vector,</span>
<span class="doccomment">/// if the `Drain` value is leaked.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// **Panics** if the starting point is greater than the end point or if</span>
<span class="doccomment">/// the end point is greater than the length of the vector.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use arrayvec::ArrayVec;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut v = ArrayVec::from([1, 2, 3]);</span>
<span class="doccomment">/// let u: ArrayVec<[_; 3]> = v.drain(0..2).collect();</span>
<span class="doccomment">/// assert_eq!(&v[..], &[3]);</span>
<span class="doccomment">/// assert_eq!(&u[..], &[1, 2]);</span>
<span class="doccomment">/// ```</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">drain</span><span class="op"><</span><span class="ident">R</span>: <span class="ident">RangeArgument</span><span class="op">></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">range</span>: <span class="ident">R</span>) <span class="op">-></span> <span class="ident">Drain</span><span class="op"><</span><span class="ident">A</span><span class="op">></span> {
<span class="comment">// Memory safety</span>
<span class="comment">//</span>
<span class="comment">// When the Drain is first created, it shortens the length of</span>
<span class="comment">// the source vector to make sure no uninitalized or moved-from elements</span>
<span class="comment">// are accessible at all if the Drain's destructor never gets to run.</span>
<span class="comment">//</span>
<span class="comment">// Drain will ptr::read out the values to remove.</span>
<span class="comment">// When finished, remaining tail of the vec is copied back to cover</span>
<span class="comment">// the hole, and the vector length is restored to the new length.</span>
<span class="comment">//</span>
<span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">len</span>();
<span class="kw">let</span> <span class="ident">start</span> <span class="op">=</span> <span class="ident">range</span>.<span class="ident">start</span>().<span class="ident">unwrap_or</span>(<span class="number">0</span>);
<span class="kw">let</span> <span class="ident">end</span> <span class="op">=</span> <span class="ident">range</span>.<span class="ident">end</span>().<span class="ident">unwrap_or</span>(<span class="ident">len</span>);
<span class="comment">// bounds check happens here</span>
<span class="kw">let</span> <span class="ident">range_slice</span>: <span class="kw-2">*</span><span class="kw">const</span> <span class="kw">_</span> <span class="op">=</span> <span class="kw-2">&</span><span class="self">self</span>[<span class="ident">start</span>..<span class="ident">end</span>];
<span class="kw">unsafe</span> {
<span class="comment">// set self.vec length's to start, to be safe in case Drain is leaked</span>
<span class="self">self</span>.<span class="ident">set_len</span>(<span class="ident">start</span>);
<span class="ident">Drain</span> {
<span class="ident">tail_start</span>: <span class="ident">end</span>,
<span class="ident">tail_len</span>: <span class="ident">len</span> <span class="op">-</span> <span class="ident">end</span>,
<span class="ident">iter</span>: (<span class="kw-2">*</span><span class="ident">range_slice</span>).<span class="ident">iter</span>(),
<span class="ident">vec</span>: <span class="self">self</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="kw">_</span>,
}
}
}
<span class="doccomment">/// Return the inner fixed size array, if it is full to its capacity.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Return an `Ok` value with the array if length equals capacity,</span>
<span class="doccomment">/// return an `Err` with self otherwise.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// `Note:` This function may incur unproportionally large overhead</span>
<span class="doccomment">/// to move the array out, its performance is not optimal.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">into_inner</span>(<span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">A</span>, <span class="self">Self</span><span class="op">></span> {
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">len</span>() <span class="op"><</span> <span class="self">self</span>.<span class="ident">capacity</span>() {
<span class="prelude-val">Err</span>(<span class="self">self</span>)
} <span class="kw">else</span> {
<span class="kw">unsafe</span> {
<span class="kw">let</span> <span class="ident">array</span> <span class="op">=</span> <span class="ident">ptr</span>::<span class="ident">read</span>(<span class="self">self</span>.<span class="ident">xs</span>.<span class="ident">ptr</span>() <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">A</span>);
<span class="ident">mem</span>::<span class="ident">forget</span>(<span class="self">self</span>);
<span class="prelude-val">Ok</span>(<span class="ident">array</span>)
}
}
}
<span class="doccomment">/// Dispose of `self` without the overwriting that is needed in Drop.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">dispose</span>(<span class="kw-2">mut</span> <span class="self">self</span>) {
<span class="self">self</span>.<span class="ident">clear</span>();
<span class="ident">mem</span>::<span class="ident">forget</span>(<span class="self">self</span>);
}
<span class="doccomment">/// Return a slice containing all elements of the vector.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">as_slice</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span>[<span class="ident">A</span>::<span class="ident">Item</span>] {
<span class="self">self</span>
}
<span class="doccomment">/// Return a mutable slice containing all elements of the vector.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">as_mut_slice</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span><span class="kw-2">mut</span> [<span class="ident">A</span>::<span class="ident">Item</span>] {
<span class="self">self</span>
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">Array</span><span class="op">></span> <span class="ident">Deref</span> <span class="kw">for</span> <span class="ident">ArrayVec</span><span class="op"><</span><span class="ident">A</span><span class="op">></span> {
<span class="kw">type</span> <span class="ident">Target</span> <span class="op">=</span> [<span class="ident">A</span>::<span class="ident">Item</span>];
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">deref</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span>[<span class="ident">A</span>::<span class="ident">Item</span>] {
<span class="kw">unsafe</span> {
<span class="ident">slice</span>::<span class="ident">from_raw_parts</span>(<span class="self">self</span>.<span class="ident">xs</span>.<span class="ident">ptr</span>(), <span class="self">self</span>.<span class="ident">len</span>())
}
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">Array</span><span class="op">></span> <span class="ident">DerefMut</span> <span class="kw">for</span> <span class="ident">ArrayVec</span><span class="op"><</span><span class="ident">A</span><span class="op">></span> {
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">deref_mut</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span><span class="kw-2">mut</span> [<span class="ident">A</span>::<span class="ident">Item</span>] {
<span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">len</span>();
<span class="kw">unsafe</span> {
<span class="ident">slice</span>::<span class="ident">from_raw_parts_mut</span>(<span class="self">self</span>.<span class="ident">xs</span>.<span class="ident">ptr_mut</span>(), <span class="ident">len</span>)
}
}
}
<span class="doccomment">/// Create an `ArrayVec` from an array.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use arrayvec::ArrayVec;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut array = ArrayVec::from([1, 2, 3]);</span>
<span class="doccomment">/// assert_eq!(array.len(), 3);</span>
<span class="doccomment">/// assert_eq!(array.capacity(), 3);</span>
<span class="doccomment">/// ```</span>
<span class="kw">impl</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">Array</span><span class="op">></span> <span class="ident">From</span><span class="op"><</span><span class="ident">A</span><span class="op">></span> <span class="kw">for</span> <span class="ident">ArrayVec</span><span class="op"><</span><span class="ident">A</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">array</span>: <span class="ident">A</span>) <span class="op">-></span> <span class="self">Self</span> {
<span class="ident">ArrayVec</span> { <span class="ident">xs</span>: <span class="ident">MaybeUninit</span>::<span class="ident">from</span>(<span class="ident">array</span>), <span class="ident">len</span>: <span class="ident">Index</span>::<span class="ident">from</span>(<span class="ident">A</span>::<span class="ident">capacity</span>()) }
}
}
<span class="doccomment">/// Iterate the `ArrayVec` with references to each element.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use arrayvec::ArrayVec;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let array = ArrayVec::from([1, 2, 3]);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// for elt in &array {</span>
<span class="doccomment">/// // ...</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// ```</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>: <span class="ident">Array</span><span class="op">></span> <span class="ident">IntoIterator</span> <span class="kw">for</span> <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">ArrayVec</span><span class="op"><</span><span class="ident">A</span><span class="op">></span> {
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">A</span>::<span class="ident">Item</span>;
<span class="kw">type</span> <span class="ident">IntoIter</span> <span class="op">=</span> <span class="ident">slice</span>::<span class="ident">Iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>::<span class="ident">Item</span><span class="op">></span>;
<span class="kw">fn</span> <span class="ident">into_iter</span>(<span class="self">self</span>) <span class="op">-></span> <span class="self">Self</span>::<span class="ident">IntoIter</span> { <span class="self">self</span>.<span class="ident">iter</span>() }
}
<span class="doccomment">/// Iterate the `ArrayVec` with mutable references to each element.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use arrayvec::ArrayVec;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut array = ArrayVec::from([1, 2, 3]);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// for elt in &mut array {</span>
<span class="doccomment">/// // ...</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// ```</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>: <span class="ident">Array</span><span class="op">></span> <span class="ident">IntoIterator</span> <span class="kw">for</span> <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="kw-2">mut</span> <span class="ident">ArrayVec</span><span class="op"><</span><span class="ident">A</span><span class="op">></span> {
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="kw-2">mut</span> <span class="ident">A</span>::<span class="ident">Item</span>;
<span class="kw">type</span> <span class="ident">IntoIter</span> <span class="op">=</span> <span class="ident">slice</span>::<span class="ident">IterMut</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>::<span class="ident">Item</span><span class="op">></span>;
<span class="kw">fn</span> <span class="ident">into_iter</span>(<span class="self">self</span>) <span class="op">-></span> <span class="self">Self</span>::<span class="ident">IntoIter</span> { <span class="self">self</span>.<span class="ident">iter_mut</span>() }
}
<span class="doccomment">/// Iterate the `ArrayVec` with each element by value.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The vector is consumed by this operation.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use arrayvec::ArrayVec;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// for elt in ArrayVec::from([1, 2, 3]) {</span>
<span class="doccomment">/// // ...</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// ```</span>
<span class="kw">impl</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">Array</span><span class="op">></span> <span class="ident">IntoIterator</span> <span class="kw">for</span> <span class="ident">ArrayVec</span><span class="op"><</span><span class="ident">A</span><span class="op">></span> {
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="ident">A</span>::<span class="ident">Item</span>;
<span class="kw">type</span> <span class="ident">IntoIter</span> <span class="op">=</span> <span class="ident">IntoIter</span><span class="op"><</span><span class="ident">A</span><span class="op">></span>;
<span class="kw">fn</span> <span class="ident">into_iter</span>(<span class="self">self</span>) <span class="op">-></span> <span class="ident">IntoIter</span><span class="op"><</span><span class="ident">A</span><span class="op">></span> {
<span class="ident">IntoIter</span> { <span class="ident">index</span>: <span class="ident">Index</span>::<span class="ident">from</span>(<span class="number">0</span>), <span class="ident">v</span>: <span class="self">self</span>, }
}
}
<span class="doccomment">/// By-value iterator for `ArrayVec`.</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">IntoIter</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">Array</span><span class="op">></span> {
<span class="ident">index</span>: <span class="ident">A</span>::<span class="ident">Index</span>,
<span class="ident">v</span>: <span class="ident">ArrayVec</span><span class="op"><</span><span class="ident">A</span><span class="op">></span>,
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">Array</span><span class="op">></span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">IntoIter</span><span class="op"><</span><span class="ident">A</span><span class="op">></span> {
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="ident">A</span>::<span class="ident">Item</span>;
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">next</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">A</span>::<span class="ident">Item</span><span class="op">></span> {
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">index</span> <span class="op">==</span> <span class="self">self</span>.<span class="ident">v</span>.<span class="ident">len</span> {
<span class="prelude-val">None</span>
} <span class="kw">else</span> {
<span class="kw">unsafe</span> {
<span class="kw">let</span> <span class="ident">index</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">index</span>.<span class="ident">to_usize</span>();
<span class="self">self</span>.<span class="ident">index</span> <span class="op">=</span> <span class="ident">Index</span>::<span class="ident">from</span>(<span class="ident">index</span> <span class="op">+</span> <span class="number">1</span>);
<span class="prelude-val">Some</span>(<span class="ident">ptr</span>::<span class="ident">read</span>(<span class="self">self</span>.<span class="ident">v</span>.<span class="ident">get_unchecked_mut</span>(<span class="ident">index</span>)))
}
}
}
<span class="kw">fn</span> <span class="ident">size_hint</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> (<span class="ident">usize</span>, <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span>) {
<span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">v</span>.<span class="ident">len</span>() <span class="op">-</span> <span class="self">self</span>.<span class="ident">index</span>.<span class="ident">to_usize</span>();
(<span class="ident">len</span>, <span class="prelude-val">Some</span>(<span class="ident">len</span>))
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">Array</span><span class="op">></span> <span class="ident">DoubleEndedIterator</span> <span class="kw">for</span> <span class="ident">IntoIter</span><span class="op"><</span><span class="ident">A</span><span class="op">></span> {
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">next_back</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">A</span>::<span class="ident">Item</span><span class="op">></span> {
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">index</span> <span class="op">==</span> <span class="self">self</span>.<span class="ident">v</span>.<span class="ident">len</span> {
<span class="prelude-val">None</span>
} <span class="kw">else</span> {
<span class="kw">unsafe</span> {
<span class="kw">let</span> <span class="ident">new_len</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">v</span>.<span class="ident">len</span>() <span class="op">-</span> <span class="number">1</span>;
<span class="self">self</span>.<span class="ident">v</span>.<span class="ident">set_len</span>(<span class="ident">new_len</span>);
<span class="prelude-val">Some</span>(<span class="ident">ptr</span>::<span class="ident">read</span>(<span class="self">self</span>.<span class="ident">v</span>.<span class="ident">get_unchecked_mut</span>(<span class="ident">new_len</span>)))
}
}
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">Array</span><span class="op">></span> <span class="ident">ExactSizeIterator</span> <span class="kw">for</span> <span class="ident">IntoIter</span><span class="op"><</span><span class="ident">A</span><span class="op">></span> { }
<span class="kw">impl</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">Array</span><span class="op">></span> <span class="ident">Drop</span> <span class="kw">for</span> <span class="ident">IntoIter</span><span class="op"><</span><span class="ident">A</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">drop</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) {
<span class="comment">// panic safety: Set length to 0 before dropping elements.</span>
<span class="kw">let</span> <span class="ident">index</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">index</span>.<span class="ident">to_usize</span>();
<span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">v</span>.<span class="ident">len</span>();
<span class="kw">unsafe</span> {
<span class="self">self</span>.<span class="ident">v</span>.<span class="ident">set_len</span>(<span class="number">0</span>);
<span class="kw">let</span> <span class="ident">elements</span> <span class="op">=</span> <span class="ident">slice</span>::<span class="ident">from_raw_parts_mut</span>(
<span class="self">self</span>.<span class="ident">v</span>.<span class="ident">get_unchecked_mut</span>(<span class="ident">index</span>),
<span class="ident">len</span> <span class="op">-</span> <span class="ident">index</span>);
<span class="ident">ptr</span>::<span class="ident">drop_in_place</span>(<span class="ident">elements</span>);
}
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">Array</span><span class="op">></span> <span class="ident">Clone</span> <span class="kw">for</span> <span class="ident">IntoIter</span><span class="op"><</span><span class="ident">A</span><span class="op">></span>
<span class="kw">where</span>
<span class="ident">A</span>::<span class="ident">Item</span>: <span class="ident">Clone</span>,
{
<span class="kw">fn</span> <span class="ident">clone</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">IntoIter</span><span class="op"><</span><span class="ident">A</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">v</span>[<span class="self">self</span>.<span class="ident">index</span>.<span class="ident">to_usize</span>()..]
.<span class="ident">iter</span>()
.<span class="ident">cloned</span>()
.<span class="ident">collect</span>::<span class="op"><</span><span class="ident">ArrayVec</span><span class="op"><</span><span class="ident">A</span><span class="op">>></span>()
.<span class="ident">into_iter</span>()
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">Array</span><span class="op">></span> <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">IntoIter</span><span class="op"><</span><span class="ident">A</span><span class="op">></span>
<span class="kw">where</span>
<span class="ident">A</span>::<span class="ident">Item</span>: <span class="ident">fmt</span>::<span class="ident">Debug</span>,
{
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="ident">f</span>.<span class="ident">debug_list</span>()
.<span class="ident">entries</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">v</span>[<span class="self">self</span>.<span class="ident">index</span>.<span class="ident">to_usize</span>()..])
.<span class="ident">finish</span>()
}
}
<span class="doccomment">/// A draining iterator for `ArrayVec`.</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Drain</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">A</span>: <span class="ident">Array</span>,
<span class="ident">A</span>::<span class="ident">Item</span>: <span class="lifetime">'a</span>,
{
<span class="doccomment">/// Index of tail to preserve</span>
<span class="ident">tail_start</span>: <span class="ident">usize</span>,
<span class="doccomment">/// Length of tail</span>
<span class="ident">tail_len</span>: <span class="ident">usize</span>,
<span class="doccomment">/// Current remaining range to remove</span>
<span class="ident">iter</span>: <span class="ident">slice</span>::<span class="ident">Iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>::<span class="ident">Item</span><span class="op">></span>,
<span class="ident">vec</span>: <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">ArrayVec</span><span class="op"><</span><span class="ident">A</span><span class="op">></span>,
}
<span class="kw">unsafe</span> <span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>: <span class="ident">Array</span> <span class="op">+</span> <span class="ident">Sync</span><span class="op">></span> <span class="ident">Sync</span> <span class="kw">for</span> <span class="ident">Drain</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span><span class="op">></span> {}
<span class="kw">unsafe</span> <span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>: <span class="ident">Array</span> <span class="op">+</span> <span class="ident">Send</span><span class="op">></span> <span class="ident">Send</span> <span class="kw">for</span> <span class="ident">Drain</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span><span class="op">></span> {}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>: <span class="ident">Array</span><span class="op">></span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">Drain</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">A</span>::<span class="ident">Item</span>: <span class="lifetime">'a</span>,
{
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="ident">A</span>::<span class="ident">Item</span>;
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">next</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="self">Self</span>::<span class="ident">Item</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">next</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">elt</span><span class="op">|</span>
<span class="kw">unsafe</span> {
<span class="ident">ptr</span>::<span class="ident">read</span>(<span class="ident">elt</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="kw">_</span>)
}
)
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">size_hint</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> (<span class="ident">usize</span>, <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span>) {
<span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">size_hint</span>()
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>: <span class="ident">Array</span><span class="op">></span> <span class="ident">DoubleEndedIterator</span> <span class="kw">for</span> <span class="ident">Drain</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">A</span>::<span class="ident">Item</span>: <span class="lifetime">'a</span>,
{
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">next_back</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="self">Self</span>::<span class="ident">Item</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">next_back</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">elt</span><span class="op">|</span>
<span class="kw">unsafe</span> {
<span class="ident">ptr</span>::<span class="ident">read</span>(<span class="ident">elt</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw">const</span> <span class="kw">_</span>)
}
)
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>: <span class="ident">Array</span><span class="op">></span> <span class="ident">ExactSizeIterator</span> <span class="kw">for</span> <span class="ident">Drain</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span><span class="op">></span> <span class="kw">where</span> <span class="ident">A</span>::<span class="ident">Item</span>: <span class="lifetime">'a</span> {}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>: <span class="ident">Array</span><span class="op">></span> <span class="ident">Drop</span> <span class="kw">for</span> <span class="ident">Drain</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">A</span>::<span class="ident">Item</span>: <span class="lifetime">'a</span>
{
<span class="kw">fn</span> <span class="ident">drop</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) {
<span class="comment">// len is currently 0 so panicking while dropping will not cause a double drop.</span>
<span class="comment">// exhaust self first</span>
<span class="kw">while</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="kw">_</span>) <span class="op">=</span> <span class="self">self</span>.<span class="ident">next</span>() { }
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">tail_len</span> <span class="op">></span> <span class="number">0</span> {
<span class="kw">unsafe</span> {
<span class="kw">let</span> <span class="ident">source_vec</span> <span class="op">=</span> <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="kw-2">*</span><span class="self">self</span>.<span class="ident">vec</span>;
<span class="comment">// memmove back untouched tail, update to new length</span>
<span class="kw">let</span> <span class="ident">start</span> <span class="op">=</span> <span class="ident">source_vec</span>.<span class="ident">len</span>();
<span class="kw">let</span> <span class="ident">tail</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">tail_start</span>;
<span class="kw">let</span> <span class="ident">src</span> <span class="op">=</span> <span class="ident">source_vec</span>.<span class="ident">as_ptr</span>().<span class="ident">offset</span>(<span class="ident">tail</span> <span class="kw">as</span> <span class="ident">isize</span>);
<span class="kw">let</span> <span class="ident">dst</span> <span class="op">=</span> <span class="ident">source_vec</span>.<span class="ident">as_mut_ptr</span>().<span class="ident">offset</span>(<span class="ident">start</span> <span class="kw">as</span> <span class="ident">isize</span>);
<span class="ident">ptr</span>::<span class="ident">copy</span>(<span class="ident">src</span>, <span class="ident">dst</span>, <span class="self">self</span>.<span class="ident">tail_len</span>);
<span class="ident">source_vec</span>.<span class="ident">set_len</span>(<span class="ident">start</span> <span class="op">+</span> <span class="self">self</span>.<span class="ident">tail_len</span>);
}
}
}
}
<span class="kw">struct</span> <span class="ident">ScopeExitGuard</span><span class="op"><</span><span class="ident">T</span>, <span class="ident">Data</span>, <span class="ident">F</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">F</span>: <span class="ident">FnMut</span>(<span class="kw-2">&</span><span class="ident">Data</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">T</span>)
{
<span class="ident">value</span>: <span class="ident">T</span>,
<span class="ident">data</span>: <span class="ident">Data</span>,
<span class="ident">f</span>: <span class="ident">F</span>,
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>, <span class="ident">Data</span>, <span class="ident">F</span><span class="op">></span> <span class="ident">Drop</span> <span class="kw">for</span> <span class="ident">ScopeExitGuard</span><span class="op"><</span><span class="ident">T</span>, <span class="ident">Data</span>, <span class="ident">F</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">F</span>: <span class="ident">FnMut</span>(<span class="kw-2">&</span><span class="ident">Data</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">T</span>)
{
<span class="kw">fn</span> <span class="ident">drop</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) {
(<span class="self">self</span>.<span class="ident">f</span>)(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">data</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>.<span class="ident">value</span>)
}
}
<span class="doccomment">/// Extend the `ArrayVec` with an iterator.</span>
<span class="doccomment">/// </span>
<span class="doccomment">/// Does not extract more items than there is space for. No error</span>
<span class="doccomment">/// occurs if there are more iterator elements.</span>
<span class="kw">impl</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">Array</span><span class="op">></span> <span class="ident">Extend</span><span class="op"><</span><span class="ident">A</span>::<span class="ident">Item</span><span class="op">></span> <span class="kw">for</span> <span class="ident">ArrayVec</span><span class="op"><</span><span class="ident">A</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">extend</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">IntoIterator</span><span class="op"><</span><span class="ident">Item</span><span class="op">=</span><span class="ident">A</span>::<span class="ident">Item</span><span class="op">>></span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">iter</span>: <span class="ident">T</span>) {
<span class="kw">let</span> <span class="ident">take</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">capacity</span>() <span class="op">-</span> <span class="self">self</span>.<span class="ident">len</span>();
<span class="kw">unsafe</span> {
<span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">len</span>();
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">ptr</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">as_mut_ptr</span>().<span class="ident">offset</span>(<span class="ident">len</span> <span class="kw">as</span> <span class="ident">isize</span>);
<span class="comment">// Keep the length in a separate variable, write it back on scope</span>
<span class="comment">// exit. To help the compiler with alias analysis and stuff.</span>
<span class="comment">// We update the length to handle panic in the iteration of the</span>
<span class="comment">// user's iterator, without dropping any elements on the floor.</span>
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">guard</span> <span class="op">=</span> <span class="ident">ScopeExitGuard</span> {
<span class="ident">value</span>: <span class="self">self</span>,
<span class="ident">data</span>: <span class="ident">len</span>,
<span class="ident">f</span>: <span class="op">|</span><span class="kw-2">&</span><span class="ident">len</span>, <span class="ident">self_</span><span class="op">|</span> {
<span class="ident">self_</span>.<span class="ident">set_len</span>(<span class="ident">len</span>)
}
};
<span class="kw">for</span> <span class="ident">elt</span> <span class="kw">in</span> <span class="ident">iter</span>.<span class="ident">into_iter</span>().<span class="ident">take</span>(<span class="ident">take</span>) {
<span class="ident">ptr</span>::<span class="ident">write</span>(<span class="ident">ptr</span>, <span class="ident">elt</span>);
<span class="ident">ptr</span> <span class="op">=</span> <span class="ident">ptr</span>.<span class="ident">offset</span>(<span class="number">1</span>);
<span class="ident">guard</span>.<span class="ident">data</span> <span class="op">+=</span> <span class="number">1</span>;
}
}
}
}
<span class="doccomment">/// Create an `ArrayVec` from an iterator.</span>
<span class="doccomment">/// </span>
<span class="doccomment">/// Does not extract more items than there is space for. No error</span>
<span class="doccomment">/// occurs if there are more iterator elements.</span>
<span class="kw">impl</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">Array</span><span class="op">></span> <span class="ident">iter</span>::<span class="ident">FromIterator</span><span class="op"><</span><span class="ident">A</span>::<span class="ident">Item</span><span class="op">></span> <span class="kw">for</span> <span class="ident">ArrayVec</span><span class="op"><</span><span class="ident">A</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">from_iter</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">IntoIterator</span><span class="op"><</span><span class="ident">Item</span><span class="op">=</span><span class="ident">A</span>::<span class="ident">Item</span><span class="op">>></span>(<span class="ident">iter</span>: <span class="ident">T</span>) <span class="op">-></span> <span class="self">Self</span> {
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">array</span> <span class="op">=</span> <span class="ident">ArrayVec</span>::<span class="ident">new</span>();
<span class="ident">array</span>.<span class="ident">extend</span>(<span class="ident">iter</span>);
<span class="ident">array</span>
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">Array</span><span class="op">></span> <span class="ident">Clone</span> <span class="kw">for</span> <span class="ident">ArrayVec</span><span class="op"><</span><span class="ident">A</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">A</span>::<span class="ident">Item</span>: <span class="ident">Clone</span>
{
<span class="kw">fn</span> <span class="ident">clone</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="self">Self</span> {
<span class="self">self</span>.<span class="ident">iter</span>().<span class="ident">cloned</span>().<span class="ident">collect</span>()
}
<span class="kw">fn</span> <span class="ident">clone_from</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">rhs</span>: <span class="kw-2">&</span><span class="self">Self</span>) {
<span class="comment">// recursive case for the common prefix</span>
<span class="kw">let</span> <span class="ident">prefix</span> <span class="op">=</span> <span class="ident">cmp</span>::<span class="ident">min</span>(<span class="self">self</span>.<span class="ident">len</span>(), <span class="ident">rhs</span>.<span class="ident">len</span>());
<span class="self">self</span>[..<span class="ident">prefix</span>].<span class="ident">clone_from_slice</span>(<span class="kw-2">&</span><span class="ident">rhs</span>[..<span class="ident">prefix</span>]);
<span class="kw">if</span> <span class="ident">prefix</span> <span class="op"><</span> <span class="self">self</span>.<span class="ident">len</span>() {
<span class="comment">// rhs was shorter</span>
<span class="kw">for</span> <span class="kw">_</span> <span class="kw">in</span> <span class="number">0</span>..<span class="self">self</span>.<span class="ident">len</span>() <span class="op">-</span> <span class="ident">prefix</span> {
<span class="self">self</span>.<span class="ident">pop</span>();
}
} <span class="kw">else</span> {
<span class="kw">let</span> <span class="ident">rhs_elems</span> <span class="op">=</span> <span class="ident">rhs</span>[<span class="self">self</span>.<span class="ident">len</span>()..].<span class="ident">iter</span>().<span class="ident">cloned</span>();
<span class="self">self</span>.<span class="ident">extend</span>(<span class="ident">rhs_elems</span>);
}
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">Array</span><span class="op">></span> <span class="ident">Hash</span> <span class="kw">for</span> <span class="ident">ArrayVec</span><span class="op"><</span><span class="ident">A</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">A</span>::<span class="ident">Item</span>: <span class="ident">Hash</span>
{
<span class="kw">fn</span> <span class="ident">hash</span><span class="op"><</span><span class="ident">H</span>: <span class="ident">Hasher</span><span class="op">></span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">state</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">H</span>) {
<span class="ident">Hash</span>::<span class="ident">hash</span>(<span class="kw-2">&</span><span class="kw-2">*</span><span class="kw-2">*</span><span class="self">self</span>, <span class="ident">state</span>)
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">Array</span><span class="op">></span> <span class="ident">PartialEq</span> <span class="kw">for</span> <span class="ident">ArrayVec</span><span class="op"><</span><span class="ident">A</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">A</span>::<span class="ident">Item</span>: <span class="ident">PartialEq</span>
{
<span class="kw">fn</span> <span class="ident">eq</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">other</span>: <span class="kw-2">&</span><span class="self">Self</span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="kw-2">*</span><span class="kw-2">*</span><span class="self">self</span> <span class="op">==</span> <span class="kw-2">*</span><span class="kw-2">*</span><span class="ident">other</span>
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">Array</span><span class="op">></span> <span class="ident">PartialEq</span><span class="op"><</span>[<span class="ident">A</span>::<span class="ident">Item</span>]<span class="op">></span> <span class="kw">for</span> <span class="ident">ArrayVec</span><span class="op"><</span><span class="ident">A</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">A</span>::<span class="ident">Item</span>: <span class="ident">PartialEq</span>
{
<span class="kw">fn</span> <span class="ident">eq</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">other</span>: <span class="kw-2">&</span>[<span class="ident">A</span>::<span class="ident">Item</span>]) <span class="op">-></span> <span class="ident">bool</span> {
<span class="kw-2">*</span><span class="kw-2">*</span><span class="self">self</span> <span class="op">==</span> <span class="kw-2">*</span><span class="ident">other</span>
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">Array</span><span class="op">></span> <span class="ident">Eq</span> <span class="kw">for</span> <span class="ident">ArrayVec</span><span class="op"><</span><span class="ident">A</span><span class="op">></span> <span class="kw">where</span> <span class="ident">A</span>::<span class="ident">Item</span>: <span class="ident">Eq</span> { }
<span class="kw">impl</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">Array</span><span class="op">></span> <span class="ident">Borrow</span><span class="op"><</span>[<span class="ident">A</span>::<span class="ident">Item</span>]<span class="op">></span> <span class="kw">for</span> <span class="ident">ArrayVec</span><span class="op"><</span><span class="ident">A</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">borrow</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span>[<span class="ident">A</span>::<span class="ident">Item</span>] { <span class="self">self</span> }
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">Array</span><span class="op">></span> <span class="ident">BorrowMut</span><span class="op"><</span>[<span class="ident">A</span>::<span class="ident">Item</span>]<span class="op">></span> <span class="kw">for</span> <span class="ident">ArrayVec</span><span class="op"><</span><span class="ident">A</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">borrow_mut</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span><span class="kw-2">mut</span> [<span class="ident">A</span>::<span class="ident">Item</span>] { <span class="self">self</span> }
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">Array</span><span class="op">></span> <span class="ident">AsRef</span><span class="op"><</span>[<span class="ident">A</span>::<span class="ident">Item</span>]<span class="op">></span> <span class="kw">for</span> <span class="ident">ArrayVec</span><span class="op"><</span><span class="ident">A</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">as_ref</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span>[<span class="ident">A</span>::<span class="ident">Item</span>] { <span class="self">self</span> }
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">Array</span><span class="op">></span> <span class="ident">AsMut</span><span class="op"><</span>[<span class="ident">A</span>::<span class="ident">Item</span>]<span class="op">></span> <span class="kw">for</span> <span class="ident">ArrayVec</span><span class="op"><</span><span class="ident">A</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">as_mut</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="kw-2">&</span><span class="kw-2">mut</span> [<span class="ident">A</span>::<span class="ident">Item</span>] { <span class="self">self</span> }
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">Array</span><span class="op">></span> <span class="ident">fmt</span>::<span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">ArrayVec</span><span class="op"><</span><span class="ident">A</span><span class="op">></span> <span class="kw">where</span> <span class="ident">A</span>::<span class="ident">Item</span>: <span class="ident">fmt</span>::<span class="ident">Debug</span> {
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> { (<span class="kw-2">*</span><span class="kw-2">*</span><span class="self">self</span>).<span class="ident">fmt</span>(<span class="ident">f</span>) }
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">Array</span><span class="op">></span> <span class="ident">Default</span> <span class="kw">for</span> <span class="ident">ArrayVec</span><span class="op"><</span><span class="ident">A</span><span class="op">></span> {
<span class="doccomment">/// Return an empty array</span>
<span class="kw">fn</span> <span class="ident">default</span>() <span class="op">-></span> <span class="ident">ArrayVec</span><span class="op"><</span><span class="ident">A</span><span class="op">></span> {
<span class="ident">ArrayVec</span>::<span class="ident">new</span>()
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">Array</span><span class="op">></span> <span class="ident">PartialOrd</span> <span class="kw">for</span> <span class="ident">ArrayVec</span><span class="op"><</span><span class="ident">A</span><span class="op">></span> <span class="kw">where</span> <span class="ident">A</span>::<span class="ident">Item</span>: <span class="ident">PartialOrd</span> {
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">partial_cmp</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">other</span>: <span class="kw-2">&</span><span class="ident">ArrayVec</span><span class="op"><</span><span class="ident">A</span><span class="op">></span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">cmp</span>::<span class="ident">Ordering</span><span class="op">></span> {
(<span class="kw-2">*</span><span class="kw-2">*</span><span class="self">self</span>).<span class="ident">partial_cmp</span>(<span class="ident">other</span>)
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">lt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">other</span>: <span class="kw-2">&</span><span class="self">Self</span>) <span class="op">-></span> <span class="ident">bool</span> {
(<span class="kw-2">*</span><span class="kw-2">*</span><span class="self">self</span>).<span class="ident">lt</span>(<span class="ident">other</span>)
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">le</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">other</span>: <span class="kw-2">&</span><span class="self">Self</span>) <span class="op">-></span> <span class="ident">bool</span> {
(<span class="kw-2">*</span><span class="kw-2">*</span><span class="self">self</span>).<span class="ident">le</span>(<span class="ident">other</span>)
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">ge</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">other</span>: <span class="kw-2">&</span><span class="self">Self</span>) <span class="op">-></span> <span class="ident">bool</span> {
(<span class="kw-2">*</span><span class="kw-2">*</span><span class="self">self</span>).<span class="ident">ge</span>(<span class="ident">other</span>)
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">gt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">other</span>: <span class="kw-2">&</span><span class="self">Self</span>) <span class="op">-></span> <span class="ident">bool</span> {
(<span class="kw-2">*</span><span class="kw-2">*</span><span class="self">self</span>).<span class="ident">gt</span>(<span class="ident">other</span>)
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">Array</span><span class="op">></span> <span class="ident">Ord</span> <span class="kw">for</span> <span class="ident">ArrayVec</span><span class="op"><</span><span class="ident">A</span><span class="op">></span> <span class="kw">where</span> <span class="ident">A</span>::<span class="ident">Item</span>: <span class="ident">Ord</span> {
<span class="kw">fn</span> <span class="ident">cmp</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">other</span>: <span class="kw-2">&</span><span class="ident">ArrayVec</span><span class="op"><</span><span class="ident">A</span><span class="op">></span>) <span class="op">-></span> <span class="ident">cmp</span>::<span class="ident">Ordering</span> {
(<span class="kw-2">*</span><span class="kw-2">*</span><span class="self">self</span>).<span class="ident">cmp</span>(<span class="ident">other</span>)
}
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span><span class="op">=</span><span class="string">"std"</span>)]</span>
<span class="doccomment">/// `Write` appends written data to the end of the vector.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Requires `features="std"`.</span>
<span class="kw">impl</span><span class="op"><</span><span class="ident">A</span>: <span class="ident">Array</span><span class="op"><</span><span class="ident">Item</span><span class="op">=</span><span class="ident">u8</span><span class="op">>></span> <span class="ident">io</span>::<span class="ident">Write</span> <span class="kw">for</span> <span class="ident">ArrayVec</span><span class="op"><</span><span class="ident">A</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">write</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">data</span>: <span class="kw-2">&</span>[<span class="ident">u8</span>]) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span> {
<span class="kw">unsafe</span> {
<span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">len</span>();
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">tail</span> <span class="op">=</span> <span class="ident">slice</span>::<span class="ident">from_raw_parts_mut</span>(<span class="self">self</span>.<span class="ident">get_unchecked_mut</span>(<span class="ident">len</span>),
<span class="ident">A</span>::<span class="ident">capacity</span>() <span class="op">-</span> <span class="ident">len</span>);
<span class="kw">let</span> <span class="ident">result</span> <span class="op">=</span> <span class="ident">tail</span>.<span class="ident">write</span>(<span class="ident">data</span>);
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">written</span>) <span class="op">=</span> <span class="ident">result</span> {
<span class="self">self</span>.<span class="ident">set_len</span>(<span class="ident">len</span> <span class="op">+</span> <span class="ident">written</span>);
}
<span class="ident">result</span>
}
}
<span class="kw">fn</span> <span class="ident">flush</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { <span class="prelude-val">Ok</span>(()) }
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span><span class="op">=</span><span class="string">"serde-1"</span>)]</span>
<span class="doccomment">/// Requires crate feature `"serde-1"`</span>
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">Serialize</span>, <span class="ident">A</span>: <span class="ident">Array</span><span class="op"><</span><span class="ident">Item</span><span class="op">=</span><span class="ident">T</span><span class="op">>></span> <span class="ident">Serialize</span> <span class="kw">for</span> <span class="ident">ArrayVec</span><span class="op"><</span><span class="ident">A</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">serialize</span><span class="op"><</span><span class="ident">S</span><span class="op">></span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">serializer</span>: <span class="ident">S</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">S</span>::<span class="prelude-val">Ok</span>, <span class="ident">S</span>::<span class="ident">Error</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">S</span>: <span class="ident">Serializer</span>
{
<span class="ident">serializer</span>.<span class="ident">collect_seq</span>(<span class="self">self</span>)
}
}
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">feature</span><span class="op">=</span><span class="string">"serde-1"</span>)]</span>
<span class="doccomment">/// Requires crate feature `"serde-1"`</span>
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'de</span>, <span class="ident">T</span>: <span class="ident">Deserialize</span><span class="op"><</span><span class="lifetime">'de</span><span class="op">></span>, <span class="ident">A</span>: <span class="ident">Array</span><span class="op"><</span><span class="ident">Item</span><span class="op">=</span><span class="ident">T</span><span class="op">>></span> <span class="ident">Deserialize</span><span class="op"><</span><span class="lifetime">'de</span><span class="op">></span> <span class="kw">for</span> <span class="ident">ArrayVec</span><span class="op"><</span><span class="ident">A</span><span class="op">></span> {
<span class="kw">fn</span> <span class="ident">deserialize</span><span class="op"><</span><span class="ident">D</span><span class="op">></span>(<span class="ident">deserializer</span>: <span class="ident">D</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="self">Self</span>, <span class="ident">D</span>::<span class="ident">Error</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">Deserializer</span><span class="op"><</span><span class="lifetime">'de</span><span class="op">></span>
{
<span class="kw">use</span> <span class="ident">serde</span>::<span class="ident">de</span>::{<span class="ident">Visitor</span>, <span class="ident">SeqAccess</span>, <span class="ident">Error</span>};
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">marker</span>::<span class="ident">PhantomData</span>;
<span class="kw">struct</span> <span class="ident">ArrayVecVisitor</span><span class="op"><</span><span class="lifetime">'de</span>, <span class="ident">T</span>: <span class="ident">Deserialize</span><span class="op"><</span><span class="lifetime">'de</span><span class="op">></span>, <span class="ident">A</span>: <span class="ident">Array</span><span class="op"><</span><span class="ident">Item</span><span class="op">=</span><span class="ident">T</span><span class="op">>></span>(<span class="ident">PhantomData</span><span class="op"><</span>(<span class="kw-2">&</span><span class="lifetime">'de</span> (), <span class="ident">T</span>, <span class="ident">A</span>)<span class="op">></span>);
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'de</span>, <span class="ident">T</span>: <span class="ident">Deserialize</span><span class="op"><</span><span class="lifetime">'de</span><span class="op">></span>, <span class="ident">A</span>: <span class="ident">Array</span><span class="op"><</span><span class="ident">Item</span><span class="op">=</span><span class="ident">T</span><span class="op">>></span> <span class="ident">Visitor</span><span class="op"><</span><span class="lifetime">'de</span><span class="op">></span> <span class="kw">for</span> <span class="ident">ArrayVecVisitor</span><span class="op"><</span><span class="lifetime">'de</span>, <span class="ident">T</span>, <span class="ident">A</span><span class="op">></span> {
<span class="kw">type</span> <span class="ident">Value</span> <span class="op">=</span> <span class="ident">ArrayVec</span><span class="op"><</span><span class="ident">A</span><span class="op">></span>;
<span class="kw">fn</span> <span class="ident">expecting</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">formatter</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="macro">write</span><span class="macro">!</span>(<span class="ident">formatter</span>, <span class="string">"an array with no more than {} items"</span>, <span class="ident">A</span>::<span class="ident">capacity</span>())
}
<span class="kw">fn</span> <span class="ident">visit_seq</span><span class="op"><</span><span class="ident">SA</span><span class="op">></span>(<span class="self">self</span>, <span class="kw-2">mut</span> <span class="ident">seq</span>: <span class="ident">SA</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="self">Self</span>::<span class="ident">Value</span>, <span class="ident">SA</span>::<span class="ident">Error</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">SA</span>: <span class="ident">SeqAccess</span><span class="op"><</span><span class="lifetime">'de</span><span class="op">></span>,
{
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">values</span> <span class="op">=</span> <span class="ident">ArrayVec</span>::<span class="op"><</span><span class="ident">A</span><span class="op">></span>::<span class="ident">new</span>();
<span class="kw">while</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">value</span>) <span class="op">=</span> <span class="macro">try</span><span class="macro">!</span>(<span class="ident">seq</span>.<span class="ident">next_element</span>()) {
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Err</span>(<span class="kw">_</span>) <span class="op">=</span> <span class="ident">values</span>.<span class="ident">try_push</span>(<span class="ident">value</span>) {
<span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">SA</span>::<span class="ident">Error</span>::<span class="ident">invalid_length</span>(<span class="ident">A</span>::<span class="ident">capacity</span>() <span class="op">+</span> <span class="number">1</span>, <span class="kw-2">&</span><span class="self">self</span>));
}
}
<span class="prelude-val">Ok</span>(<span class="ident">values</span>)
}
}
<span class="ident">deserializer</span>.<span class="ident">deserialize_seq</span>(<span class="ident">ArrayVecVisitor</span>::<span class="op"><</span><span class="ident">T</span>, <span class="ident">A</span><span class="op">></span>(<span class="ident">PhantomData</span>))
}
}
</pre>
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