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</pre><pre class="rust">
<span class="comment">// Copyright 2014-2016 bluss and ndarray developers.</span>
<span class="comment">//</span>
<span class="comment">// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or</span>
<span class="comment">// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license</span>
<span class="comment">// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your</span>
<span class="comment">// option. This file may not be copied, modified, or distributed</span>
<span class="comment">// except according to those terms.</span>
<span class="attribute">#[<span class="ident">macro_use</span>]</span> <span class="kw">mod</span> <span class="ident">macros</span>;
<span class="kw">mod</span> <span class="ident">chunks</span>;
<span class="kw">mod</span> <span class="ident">windows</span>;
<span class="kw">mod</span> <span class="ident">lanes</span>;
<span class="kw">pub</span> <span class="kw">mod</span> <span class="ident">iter</span>;
<span class="kw">use</span> <span class="ident">std::marker::PhantomData</span>;
<span class="kw">use</span> <span class="ident">std::ptr</span>;
<span class="kw">use</span> <span class="ident">Ix1</span>;
<span class="kw">use</span> <span class="kw">super</span>::{<span class="ident">Dimension</span>, <span class="ident">Ix</span>, <span class="ident">Ixs</span>};
<span class="kw">use</span> <span class="kw">super</span>::{
<span class="ident">ArrayBase</span>,
<span class="ident">Data</span>,
<span class="ident">ArrayView</span>,
<span class="ident">ArrayViewMut</span>,
<span class="ident">RemoveAxis</span>,
<span class="ident">Axis</span>,
<span class="ident">NdProducer</span>,
};
<span class="kw">pub</span> <span class="kw">use</span> <span class="self">self</span><span class="ident">::windows</span>::{
<span class="ident">Windows</span>,
<span class="ident">windows</span>
};
<span class="kw">pub</span> <span class="kw">use</span> <span class="self">self</span><span class="ident">::chunks</span>::{
<span class="ident">ExactChunks</span>,
<span class="ident">ExactChunksIter</span>,
<span class="ident">exact_chunks_of</span>,
<span class="ident">ExactChunksMut</span>,
<span class="ident">ExactChunksIterMut</span>,
<span class="ident">exact_chunks_mut_of</span>,
};
<span class="kw">pub</span> <span class="kw">use</span> <span class="self">self</span><span class="ident">::lanes</span>::{
<span class="ident">new_lanes</span>,
<span class="ident">new_lanes_mut</span>,
<span class="ident">Lanes</span>,
<span class="ident">LanesMut</span>,
};
<span class="kw">use</span> <span class="ident">std::slice</span>::{<span class="self">self</span>, <span class="ident">Iter</span> <span class="kw">as</span> <span class="ident">SliceIter</span>, <span class="ident">IterMut</span> <span class="kw">as</span> <span class="ident">SliceIterMut</span>};
<span class="doccomment">/// Base for array iterators</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Iterator element type is `&'a A`.</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Baseiter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>: <span class="lifetime">'a</span>, <span class="ident">D</span><span class="op">></span> {
<span class="comment">// Can have pub fields because it is not itself pub.</span>
<span class="kw">pub</span> <span class="ident">ptr</span>: <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">A</span>,
<span class="kw">pub</span> <span class="ident">dim</span>: <span class="ident">D</span>,
<span class="kw">pub</span> <span class="ident">strides</span>: <span class="ident">D</span>,
<span class="kw">pub</span> <span class="ident">index</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">D</span><span class="op">></span>,
<span class="kw">pub</span> <span class="ident">life</span>: <span class="ident">PhantomData</span><span class="op"><</span><span class="kw-2">&</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">D</span>: <span class="ident">Dimension</span><span class="op">></span> <span class="ident">Baseiter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span> {
<span class="doccomment">/// Creating a Baseiter is unsafe, because it can</span>
<span class="doccomment">/// have any lifetime, be immut or mut, and the</span>
<span class="doccomment">/// boundary and stride parameters need to be correct to</span>
<span class="doccomment">/// avoid memory unsafety.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// It must be placed in the correct mother iterator to be safe.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// NOTE: Mind the lifetime, it's arbitrary</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">new</span>(<span class="ident">ptr</span>: <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">A</span>, <span class="ident">len</span>: <span class="ident">D</span>, <span class="ident">stride</span>: <span class="ident">D</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Baseiter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span> {
<span class="ident">Baseiter</span> {
<span class="ident">ptr</span>: <span class="ident">ptr</span>,
<span class="ident">index</span>: <span class="ident">len</span>.<span class="ident">first_index</span>(),
<span class="ident">dim</span>: <span class="ident">len</span>,
<span class="ident">strides</span>: <span class="ident">stride</span>,
<span class="ident">life</span>: <span class="ident">PhantomData</span>,
}
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span>: <span class="ident">Dimension</span><span class="op">></span> <span class="ident">Baseiter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span> {
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">pub</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="op">></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">A</span><span class="op">></span> {
<span class="kw">let</span> <span class="ident">index</span> <span class="op">=</span> <span class="kw">match</span> <span class="self">self</span>.<span class="ident">index</span> {
<span class="prelude-val">None</span> <span class="op">=</span><span class="op">></span> <span class="kw">return</span> <span class="prelude-val">None</span>,
<span class="prelude-val">Some</span>(<span class="kw-2">ref</span> <span class="ident">ix</span>) <span class="op">=</span><span class="op">></span> <span class="ident">ix</span>.<span class="ident">clone</span>(),
};
<span class="kw">let</span> <span class="ident">offset</span> <span class="op">=</span> <span class="ident">D::stride_offset</span>(<span class="kw-2">&</span><span class="ident">index</span>, <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">strides</span>);
<span class="self">self</span>.<span class="ident">index</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">dim</span>.<span class="ident">next_for</span>(<span class="ident">index</span>);
<span class="kw">unsafe</span> { <span class="prelude-val">Some</span>(<span class="self">self</span>.<span class="ident">ptr</span>.<span class="ident">offset</span>(<span class="ident">offset</span>)) }
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">next_ref</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">A</span><span class="op">></span> {
<span class="kw">unsafe</span> { <span class="self">self</span>.<span class="ident">next</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">p</span><span class="op">|</span> <span class="kw-2">&</span><span class="kw-2">*</span><span class="ident">p</span>) }
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">next_ref_mut</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Option</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="op">></span> {
<span class="kw">unsafe</span> { <span class="self">self</span>.<span class="ident">next</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">p</span><span class="op">|</span> <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="kw-2">*</span><span class="ident">p</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="op">></span> <span class="ident">usize</span> {
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">index</span> {
<span class="prelude-val">None</span> <span class="op">=</span><span class="op">></span> <span class="number">0</span>,
<span class="prelude-val">Some</span>(<span class="kw-2">ref</span> <span class="ident">ix</span>) <span class="op">=</span><span class="op">></span> {
<span class="kw">let</span> <span class="ident">gone</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">dim</span>
.<span class="ident">default_strides</span>()
.<span class="ident">slice</span>()
.<span class="ident">iter</span>()
.<span class="ident">zip</span>(<span class="ident">ix</span>.<span class="ident">slice</span>().<span class="ident">iter</span>())
.<span class="ident">fold</span>(<span class="number">0</span>, <span class="op">|</span><span class="ident">s</span>, (<span class="kw-2">&</span><span class="ident">a</span>, <span class="kw-2">&</span><span class="ident">b</span>)<span class="op">|</span> <span class="ident">s</span> <span class="op">+</span> <span class="ident">a</span> <span class="kw">as</span> <span class="ident">usize</span> <span class="op">*</span> <span class="ident">b</span> <span class="kw">as</span> <span class="ident">usize</span>);
<span class="self">self</span>.<span class="ident">dim</span>.<span class="ident">size</span>() <span class="op">-</span> <span class="ident">gone</span>
}
}
}
<span class="kw">fn</span> <span class="ident">fold</span><span class="op"><</span><span class="ident">Acc</span>, <span class="ident">G</span><span class="op">></span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">init</span>: <span class="ident">Acc</span>, <span class="kw-2">mut</span> <span class="ident">g</span>: <span class="ident">G</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Acc</span>
<span class="kw">where</span> <span class="ident">G</span>: <span class="ident">FnMut</span>(<span class="ident">Acc</span>, <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">A</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Acc</span>,
{
<span class="kw">let</span> <span class="ident">ndim</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">dim</span>.<span class="ident">ndim</span>();
<span class="macro">debug_assert_ne!</span>(<span class="ident">ndim</span>, <span class="number">0</span>);
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">accum</span> <span class="op">=</span> <span class="ident">init</span>;
<span class="kw">loop</span> {
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="kw-2">mut</span> <span class="ident">index</span>) <span class="op">=</span> <span class="self">self</span>.<span class="ident">index</span>.<span class="ident">clone</span>() {
<span class="kw">let</span> <span class="ident">stride</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">strides</span>.<span class="ident">last_elem</span>() <span class="kw">as</span> <span class="ident">isize</span>;
<span class="kw">let</span> <span class="ident">elem_index</span> <span class="op">=</span> <span class="ident">index</span>.<span class="ident">last_elem</span>();
<span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">dim</span>.<span class="ident">last_elem</span>();
<span class="kw">let</span> <span class="ident">offset</span> <span class="op">=</span> <span class="ident">D::stride_offset</span>(<span class="kw-2">&</span><span class="ident">index</span>, <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">strides</span>);
<span class="kw">unsafe</span> {
<span class="kw">let</span> <span class="ident">row_ptr</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">ptr</span>.<span class="ident">offset</span>(<span class="ident">offset</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="op">-</span> <span class="ident">elem_index</span>) {
<span class="ident">accum</span> <span class="op">=</span> <span class="ident">g</span>(<span class="ident">accum</span>, <span class="ident">row_ptr</span>.<span class="ident">offset</span>(<span class="ident">i</span> <span class="kw">as</span> <span class="ident">isize</span> <span class="op">*</span> <span class="ident">stride</span>));
}
}
<span class="ident">index</span>.<span class="ident">set_last_elem</span>(<span class="ident">len</span> <span class="op">-</span> <span class="number">1</span>);
<span class="self">self</span>.<span class="ident">index</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">dim</span>.<span class="ident">next_for</span>(<span class="ident">index</span>);
} <span class="kw">else</span> {
<span class="kw">break</span>;
};
}
<span class="ident">accum</span>
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span><span class="op">></span> <span class="ident">Baseiter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">Ix1</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="op">></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">A</span><span class="op">></span> {
<span class="kw">let</span> <span class="ident">index</span> <span class="op">=</span> <span class="kw">match</span> <span class="self">self</span>.<span class="ident">index</span> {
<span class="prelude-val">None</span> <span class="op">=</span><span class="op">></span> <span class="kw">return</span> <span class="prelude-val">None</span>,
<span class="prelude-val">Some</span>(<span class="ident">ix</span>) <span class="op">=</span><span class="op">></span> <span class="ident">ix</span>,
};
<span class="self">self</span>.<span class="ident">dim</span>[<span class="number">0</span>] <span class="op">-</span><span class="op">=</span> <span class="number">1</span>;
<span class="kw">let</span> <span class="ident">offset</span> <span class="op">=</span> <span class="op"><</span><span class="kw">_</span><span class="op">></span><span class="ident">::stride_offset</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">dim</span>, <span class="kw-2">&</span><span class="self">self</span>.<span class="ident">strides</span>);
<span class="kw">if</span> <span class="ident">index</span> <span class="op">=</span><span class="op">=</span> <span class="self">self</span>.<span class="ident">dim</span> {
<span class="self">self</span>.<span class="ident">index</span> <span class="op">=</span> <span class="prelude-val">None</span>;
}
<span class="kw">unsafe</span> { <span class="prelude-val">Some</span>(<span class="self">self</span>.<span class="ident">ptr</span>.<span class="ident">offset</span>(<span class="ident">offset</span>)) }
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">next_back_ref</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">A</span><span class="op">></span> {
<span class="kw">unsafe</span> { <span class="self">self</span>.<span class="ident">next_back</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">p</span><span class="op">|</span> <span class="kw-2">&</span><span class="kw-2">*</span><span class="ident">p</span>) }
}
<span class="attribute">#[<span class="ident">inline</span>]</span>
<span class="kw">fn</span> <span class="ident">next_back_ref_mut</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Option</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="op">></span> {
<span class="kw">unsafe</span> { <span class="self">self</span>.<span class="ident">next_back</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">p</span><span class="op">|</span> <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="kw-2">*</span><span class="ident">p</span>) }
}
}
<span class="macro">clone_bounds!</span>(
[<span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span>: <span class="ident">Clone</span>]
<span class="ident">Baseiter</span>[<span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span>] {
@<span class="ident">copy</span> {
<span class="ident">ptr</span>,
<span class="ident">life</span>,
}
<span class="ident">dim</span>,
<span class="ident">strides</span>,
<span class="ident">index</span>,
}
);
<span class="macro">clone_bounds!</span>(
[<span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span>: <span class="ident">Clone</span>]
<span class="ident">ElementsBase</span>[<span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span>] {
@<span class="ident">copy</span> {
}
<span class="ident">inner</span>,
}
);
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span>: <span class="ident">Dimension</span><span class="op">></span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">ElementsBase</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</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="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="op">></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">A</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">next_ref</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="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">inner</span>.<span class="ident">len</span>();
(<span class="ident">len</span>, <span class="prelude-val">Some</span>(<span class="ident">len</span>))
}
<span class="kw">fn</span> <span class="ident">fold</span><span class="op"><</span><span class="ident">Acc</span>, <span class="ident">G</span><span class="op">></span>(<span class="self">self</span>, <span class="ident">init</span>: <span class="ident">Acc</span>, <span class="kw-2">mut</span> <span class="ident">g</span>: <span class="ident">G</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Acc</span>
<span class="kw">where</span> <span class="ident">G</span>: <span class="ident">FnMut</span>(<span class="ident">Acc</span>, <span class="self">Self</span><span class="ident">::Item</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Acc</span>,
{
<span class="kw">unsafe</span> {
<span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">fold</span>(<span class="ident">init</span>, <span class="kw">move</span> <span class="op">|</span><span class="ident">acc</span>, <span class="ident">ptr</span><span class="op">|</span> <span class="ident">g</span>(<span class="ident">acc</span>, <span class="kw-2">&</span><span class="kw-2">*</span><span class="ident">ptr</span>))
}
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span><span class="op">></span> <span class="ident">DoubleEndedIterator</span> <span class="kw">for</span> <span class="ident">ElementsBase</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">Ix1</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="op">></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">A</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">next_back_ref</span>()
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span> <span class="ident">ExactSizeIterator</span> <span class="kw">for</span> <span class="ident">ElementsBase</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">Dimension</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="op">></span> <span class="ident">usize</span> {
<span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">len</span>()
}
}
<span class="macro">macro_rules!</span> <span class="ident">either</span> {
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">value</span>:<span class="ident">expr</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">inner</span>:<span class="ident">pat</span> <span class="op">=</span><span class="op">></span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">result</span>:<span class="ident">expr</span>) <span class="op">=</span><span class="op">></span> (
<span class="kw">match</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">value</span> {
<span class="ident">ElementsRepr::Slice</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">inner</span>) <span class="op">=</span><span class="op">></span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">result</span>,
<span class="ident">ElementsRepr::Counted</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">inner</span>) <span class="op">=</span><span class="op">></span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">result</span>,
}
)
}
<span class="macro">macro_rules!</span> <span class="ident">either_mut</span> {
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">value</span>:<span class="ident">expr</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">inner</span>:<span class="ident">ident</span> <span class="op">=</span><span class="op">></span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">result</span>:<span class="ident">expr</span>) <span class="op">=</span><span class="op">></span> (
<span class="kw">match</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">value</span> {
<span class="ident">ElementsRepr::Slice</span>(<span class="kw-2">ref</span> <span class="kw-2">mut</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">inner</span>) <span class="op">=</span><span class="op">></span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">result</span>,
<span class="ident">ElementsRepr::Counted</span>(<span class="kw-2">ref</span> <span class="kw-2">mut</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">inner</span>) <span class="op">=</span><span class="op">></span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">result</span>,
}
)
}
<span class="macro">clone_bounds!</span>(
[<span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span>: <span class="ident">Clone</span>]
<span class="ident">Iter</span>[<span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span>] {
@<span class="ident">copy</span> {
}
<span class="ident">inner</span>,
}
);
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span> <span class="ident">Iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">Dimension</span>
{
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">self_</span>: <span class="ident">ArrayView</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>) <span class="op">-</span><span class="op">></span> <span class="self">Self</span> {
<span class="ident">Iter</span> {
<span class="ident">inner</span>: <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">slc</span>) <span class="op">=</span> <span class="ident">self_</span>.<span class="ident">into_slice</span>() {
<span class="ident">ElementsRepr::Slice</span>(<span class="ident">slc</span>.<span class="ident">iter</span>())
} <span class="kw">else</span> {
<span class="ident">ElementsRepr::Counted</span>(<span class="ident">self_</span>.<span class="ident">into_elements_base</span>())
},
}
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span> <span class="ident">IterMut</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">Dimension</span>
{
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">self_</span>: <span class="ident">ArrayViewMut</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>) <span class="op">-</span><span class="op">></span> <span class="self">Self</span> {
<span class="ident">IterMut</span> {
<span class="ident">inner</span>:
<span class="kw">match</span> <span class="ident">self_</span>.<span class="ident">into_slice_</span>() {
<span class="prelude-val">Ok</span>(<span class="ident">x</span>) <span class="op">=</span><span class="op">></span> <span class="ident">ElementsRepr::Slice</span>(<span class="ident">x</span>.<span class="ident">into_iter</span>()),
<span class="prelude-val">Err</span>(<span class="ident">self_</span>) <span class="op">=</span><span class="op">></span> <span class="ident">ElementsRepr::Counted</span>(<span class="ident">self_</span>.<span class="ident">into_elements_base</span>()),
}
}
}
}
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>)]</span>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">ElementsRepr</span><span class="op"><</span><span class="ident">S</span>, <span class="ident">C</span><span class="op">></span> {
<span class="ident">Slice</span>(<span class="ident">S</span>),
<span class="ident">Counted</span>(<span class="ident">C</span>),
}
<span class="doccomment">/// An iterator over the elements of an array.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Iterator element type is `&'a A`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// See [`.iter()`](../struct.ArrayBase.html#method.iter) for more information.</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>: <span class="lifetime">'a</span>, <span class="ident">D</span><span class="op">></span> {
<span class="ident">inner</span>: <span class="ident">ElementsRepr</span><span class="op"><</span><span class="ident">SliceIter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span><span class="op">></span>, <span class="ident">ElementsBase</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span><span class="op">></span>,
}
<span class="doccomment">/// Counted read only iterator</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">ElementsBase</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>: <span class="lifetime">'a</span>, <span class="ident">D</span><span class="op">></span> {
<span class="kw">pub</span> <span class="ident">inner</span>: <span class="ident">Baseiter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>,
}
<span class="doccomment">/// An iterator over the elements of an array (mutable).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Iterator element type is `&'a mut A`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// See [`.iter_mut()`](../struct.ArrayBase.html#method.iter_mut) for more information.</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">IterMut</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>: <span class="lifetime">'a</span>, <span class="ident">D</span><span class="op">></span> {
<span class="ident">inner</span>: <span class="ident">ElementsRepr</span><span class="op"><</span><span class="ident">SliceIterMut</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span><span class="op">></span>, <span class="ident">ElementsBaseMut</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span><span class="op">></span>,
}
<span class="doccomment">/// An iterator over the elements of an array.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Iterator element type is `&'a mut A`.</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">ElementsBaseMut</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>: <span class="lifetime">'a</span>, <span class="ident">D</span><span class="op">></span> {
<span class="kw">pub</span> <span class="ident">inner</span>: <span class="ident">Baseiter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>,
}
<span class="doccomment">/// An iterator over the indexes and elements of an array.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// See [`.indexed_iter()`](../struct.ArrayBase.html#method.indexed_iter) for more information.</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">IndexedIter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>: <span class="lifetime">'a</span>, <span class="ident">D</span><span class="op">></span>(<span class="ident">ElementsBase</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>);
<span class="doccomment">/// An iterator over the indexes and elements of an array (mutable).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// See [`.indexed_iter_mut()`](../struct.ArrayBase.html#method.indexed_iter_mut) for more information.</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">IndexedIterMut</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>: <span class="lifetime">'a</span>, <span class="ident">D</span><span class="op">></span>(<span class="ident">ElementsBaseMut</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</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">D</span><span class="op">></span> <span class="ident">IndexedIter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">Dimension</span>
{
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">x</span>: <span class="ident">ElementsBase</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>) <span class="op">-</span><span class="op">></span> <span class="self">Self</span> {
<span class="ident">IndexedIter</span>(<span class="ident">x</span>)
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span> <span class="ident">IndexedIterMut</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">Dimension</span>
{
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">x</span>: <span class="ident">ElementsBaseMut</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>) <span class="op">-</span><span class="op">></span> <span class="self">Self</span> {
<span class="ident">IndexedIterMut</span>(<span class="ident">x</span>)
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span>: <span class="ident">Dimension</span><span class="op">></span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">Iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</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="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="op">></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">A</span><span class="op">></span> {
<span class="macro">either_mut!</span>(<span class="self">self</span>.<span class="ident">inner</span>, <span class="ident">iter</span> <span class="op">=</span><span class="op">></span> <span class="ident">iter</span>.<span class="ident">next</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="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="macro">either!</span>(<span class="self">self</span>.<span class="ident">inner</span>, <span class="kw-2">ref</span> <span class="ident">iter</span> <span class="op">=</span><span class="op">></span> <span class="ident">iter</span>.<span class="ident">size_hint</span>())
}
<span class="kw">fn</span> <span class="ident">fold</span><span class="op"><</span><span class="ident">Acc</span>, <span class="ident">G</span><span class="op">></span>(<span class="self">self</span>, <span class="ident">init</span>: <span class="ident">Acc</span>, <span class="ident">g</span>: <span class="ident">G</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Acc</span>
<span class="kw">where</span> <span class="ident">G</span>: <span class="ident">FnMut</span>(<span class="ident">Acc</span>, <span class="self">Self</span><span class="ident">::Item</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Acc</span>
{
<span class="macro">either!</span>(<span class="self">self</span>.<span class="ident">inner</span>, <span class="ident">iter</span> <span class="op">=</span><span class="op">></span> <span class="ident">iter</span>.<span class="ident">fold</span>(<span class="ident">init</span>, <span class="ident">g</span>))
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span><span class="op">></span> <span class="ident">DoubleEndedIterator</span> <span class="kw">for</span> <span class="ident">Iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">Ix1</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="op">></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">A</span><span class="op">></span> {
<span class="macro">either_mut!</span>(<span class="self">self</span>.<span class="ident">inner</span>, <span class="ident">iter</span> <span class="op">=</span><span class="op">></span> <span class="ident">iter</span>.<span class="ident">next_back</span>())
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span> <span class="ident">ExactSizeIterator</span> <span class="kw">for</span> <span class="ident">Iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">Dimension</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="op">></span> <span class="ident">usize</span> {
<span class="macro">either!</span>(<span class="self">self</span>.<span class="ident">inner</span>, <span class="kw-2">ref</span> <span class="ident">iter</span> <span class="op">=</span><span class="op">></span> <span class="ident">iter</span>.<span class="ident">len</span>())
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span>: <span class="ident">Dimension</span><span class="op">></span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">IndexedIter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span> {
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> (<span class="ident">D::Pattern</span>, <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">A</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="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="kw">let</span> <span class="ident">index</span> <span class="op">=</span> <span class="kw">match</span> <span class="self">self</span>.<span class="number">0</span>.<span class="ident">inner</span>.<span class="ident">index</span> {
<span class="prelude-val">None</span> <span class="op">=</span><span class="op">></span> <span class="kw">return</span> <span class="prelude-val">None</span>,
<span class="prelude-val">Some</span>(<span class="kw-2">ref</span> <span class="ident">ix</span>) <span class="op">=</span><span class="op">></span> <span class="ident">ix</span>.<span class="ident">clone</span>(),
};
<span class="kw">match</span> <span class="self">self</span>.<span class="number">0</span>.<span class="ident">inner</span>.<span class="ident">next_ref</span>() {
<span class="prelude-val">None</span> <span class="op">=</span><span class="op">></span> <span class="prelude-val">None</span>,
<span class="prelude-val">Some</span>(<span class="ident">p</span>) <span class="op">=</span><span class="op">></span> <span class="prelude-val">Some</span>((<span class="ident">index</span>.<span class="ident">into_pattern</span>(), <span class="ident">p</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="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="number">0</span>.<span class="ident">inner</span>.<span class="ident">len</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="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span> <span class="ident">ExactSizeIterator</span> <span class="kw">for</span> <span class="ident">IndexedIter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">Dimension</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="op">></span> <span class="ident">usize</span> {
<span class="self">self</span>.<span class="number">0</span>.<span class="ident">inner</span>.<span class="ident">len</span>()
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span>: <span class="ident">Dimension</span><span class="op">></span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">IterMut</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</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="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="op">></span> <span class="prelude-ty">Option</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="op">></span> {
<span class="macro">either_mut!</span>(<span class="self">self</span>.<span class="ident">inner</span>, <span class="ident">iter</span> <span class="op">=</span><span class="op">></span> <span class="ident">iter</span>.<span class="ident">next</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="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="macro">either!</span>(<span class="self">self</span>.<span class="ident">inner</span>, <span class="kw-2">ref</span> <span class="ident">iter</span> <span class="op">=</span><span class="op">></span> <span class="ident">iter</span>.<span class="ident">size_hint</span>())
}
<span class="kw">fn</span> <span class="ident">fold</span><span class="op"><</span><span class="ident">Acc</span>, <span class="ident">G</span><span class="op">></span>(<span class="self">self</span>, <span class="ident">init</span>: <span class="ident">Acc</span>, <span class="ident">g</span>: <span class="ident">G</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Acc</span>
<span class="kw">where</span> <span class="ident">G</span>: <span class="ident">FnMut</span>(<span class="ident">Acc</span>, <span class="self">Self</span><span class="ident">::Item</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Acc</span>
{
<span class="macro">either!</span>(<span class="self">self</span>.<span class="ident">inner</span>, <span class="ident">iter</span> <span class="op">=</span><span class="op">></span> <span class="ident">iter</span>.<span class="ident">fold</span>(<span class="ident">init</span>, <span class="ident">g</span>))
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span><span class="op">></span> <span class="ident">DoubleEndedIterator</span> <span class="kw">for</span> <span class="ident">IterMut</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">Ix1</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="op">></span> <span class="prelude-ty">Option</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="op">></span> {
<span class="macro">either_mut!</span>(<span class="self">self</span>.<span class="ident">inner</span>, <span class="ident">iter</span> <span class="op">=</span><span class="op">></span> <span class="ident">iter</span>.<span class="ident">next_back</span>())
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span> <span class="ident">ExactSizeIterator</span> <span class="kw">for</span> <span class="ident">IterMut</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">Dimension</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="op">></span> <span class="ident">usize</span> {
<span class="macro">either!</span>(<span class="self">self</span>.<span class="ident">inner</span>, <span class="kw-2">ref</span> <span class="ident">iter</span> <span class="op">=</span><span class="op">></span> <span class="ident">iter</span>.<span class="ident">len</span>())
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span>: <span class="ident">Dimension</span><span class="op">></span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">ElementsBaseMut</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</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="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="op">></span> <span class="prelude-ty">Option</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="op">></span> {
<span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">next_ref_mut</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="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">inner</span>.<span class="ident">len</span>();
(<span class="ident">len</span>, <span class="prelude-val">Some</span>(<span class="ident">len</span>))
}
<span class="kw">fn</span> <span class="ident">fold</span><span class="op"><</span><span class="ident">Acc</span>, <span class="ident">G</span><span class="op">></span>(<span class="self">self</span>, <span class="ident">init</span>: <span class="ident">Acc</span>, <span class="kw-2">mut</span> <span class="ident">g</span>: <span class="ident">G</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Acc</span>
<span class="kw">where</span> <span class="ident">G</span>: <span class="ident">FnMut</span>(<span class="ident">Acc</span>, <span class="self">Self</span><span class="ident">::Item</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Acc</span>
{
<span class="kw">unsafe</span> {
<span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">fold</span>(<span class="ident">init</span>, <span class="kw">move</span> <span class="op">|</span><span class="ident">acc</span>, <span class="ident">ptr</span><span class="op">|</span> <span class="ident">g</span>(<span class="ident">acc</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="kw-2">*</span><span class="ident">ptr</span>))
}
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span><span class="op">></span> <span class="ident">DoubleEndedIterator</span> <span class="kw">for</span> <span class="ident">ElementsBaseMut</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">Ix1</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="op">></span> <span class="prelude-ty">Option</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="op">></span> {
<span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">next_back_ref_mut</span>()
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span> <span class="ident">ExactSizeIterator</span> <span class="kw">for</span> <span class="ident">ElementsBaseMut</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">Dimension</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="op">></span> <span class="ident">usize</span> {
<span class="self">self</span>.<span class="ident">inner</span>.<span class="ident">len</span>()
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span>: <span class="ident">Dimension</span><span class="op">></span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">IndexedIterMut</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span> {
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> (<span class="ident">D::Pattern</span>, <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="kw-2">mut</span> <span class="ident">A</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="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="kw">let</span> <span class="ident">index</span> <span class="op">=</span> <span class="kw">match</span> <span class="self">self</span>.<span class="number">0</span>.<span class="ident">inner</span>.<span class="ident">index</span> {
<span class="prelude-val">None</span> <span class="op">=</span><span class="op">></span> <span class="kw">return</span> <span class="prelude-val">None</span>,
<span class="prelude-val">Some</span>(<span class="kw-2">ref</span> <span class="ident">ix</span>) <span class="op">=</span><span class="op">></span> <span class="ident">ix</span>.<span class="ident">clone</span>(),
};
<span class="kw">match</span> <span class="self">self</span>.<span class="number">0</span>.<span class="ident">inner</span>.<span class="ident">next_ref_mut</span>() {
<span class="prelude-val">None</span> <span class="op">=</span><span class="op">></span> <span class="prelude-val">None</span>,
<span class="prelude-val">Some</span>(<span class="ident">p</span>) <span class="op">=</span><span class="op">></span> <span class="prelude-val">Some</span>((<span class="ident">index</span>.<span class="ident">into_pattern</span>(), <span class="ident">p</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="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="number">0</span>.<span class="ident">inner</span>.<span class="ident">len</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="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span> <span class="ident">ExactSizeIterator</span> <span class="kw">for</span> <span class="ident">IndexedIterMut</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">Dimension</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="op">></span> <span class="ident">usize</span> {
<span class="self">self</span>.<span class="number">0</span>.<span class="ident">inner</span>.<span class="ident">len</span>()
}
}
<span class="doccomment">/// An iterator that traverses over all dimensions but the innermost,</span>
<span class="doccomment">/// and yields each inner row.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// See [`.lanes()`](../struct.ArrayBase.html#method.lanes) for more information.</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">LanesIter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>: <span class="lifetime">'a</span>, <span class="ident">D</span><span class="op">></span> {
<span class="ident">inner_len</span>: <span class="ident">Ix</span>,
<span class="ident">inner_stride</span>: <span class="ident">Ixs</span>,
<span class="ident">iter</span>: <span class="ident">Baseiter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</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">D</span><span class="op">></span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">LanesIter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">Dimension</span>
{
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="ident">ArrayView</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">Ix1</span><span class="op">></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="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">ptr</span><span class="op">|</span> {
<span class="kw">unsafe</span> { <span class="ident">ArrayView::new_</span>(<span class="ident">ptr</span>, <span class="ident">Ix1</span>(<span class="self">self</span>.<span class="ident">inner_len</span>), <span class="ident">Ix1</span>(<span class="self">self</span>.<span class="ident">inner_stride</span> <span class="kw">as</span> <span class="ident">Ix</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="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">iter</span>.<span class="ident">len</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="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span> <span class="ident">ExactSizeIterator</span> <span class="kw">for</span> <span class="ident">LanesIter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">Dimension</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="op">></span> <span class="ident">usize</span> {
<span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">len</span>()
}
}
<span class="comment">// NOTE: LanesIterMut is a mutable iterator and must not expose aliasing</span>
<span class="comment">// pointers. Due to this we use an empty slice for the raw data (it's unused</span>
<span class="comment">// anyway).</span>
<span class="doccomment">/// An iterator that traverses over all dimensions but the innermost,</span>
<span class="doccomment">/// and yields each inner row (mutable).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// See [`.lanes_mut()`](../struct.ArrayBase.html#method.lanes_mut)</span>
<span class="doccomment">/// for more information.</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">LanesIterMut</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>: <span class="lifetime">'a</span>, <span class="ident">D</span><span class="op">></span> {
<span class="ident">inner_len</span>: <span class="ident">Ix</span>,
<span class="ident">inner_stride</span>: <span class="ident">Ixs</span>,
<span class="ident">iter</span>: <span class="ident">Baseiter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</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">D</span><span class="op">></span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">LanesIterMut</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">Dimension</span>,
{
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="ident">ArrayViewMut</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">Ix1</span><span class="op">></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="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">ptr</span><span class="op">|</span> {
<span class="kw">unsafe</span> {
<span class="ident">ArrayViewMut::new_</span>(<span class="ident">ptr</span>, <span class="ident">Ix1</span>(<span class="self">self</span>.<span class="ident">inner_len</span>), <span class="ident">Ix1</span>(<span class="self">self</span>.<span class="ident">inner_stride</span> <span class="kw">as</span> <span class="ident">Ix</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="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">iter</span>.<span class="ident">len</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="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span> <span class="ident">ExactSizeIterator</span> <span class="kw">for</span> <span class="ident">LanesIterMut</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">Dimension</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="op">></span> <span class="ident">usize</span> {
<span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">len</span>()
}
}
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">OuterIterCore</span><span class="op"><</span><span class="ident">A</span>, <span class="ident">D</span><span class="op">></span> {
<span class="ident">index</span>: <span class="ident">Ix</span>,
<span class="ident">len</span>: <span class="ident">Ix</span>,
<span class="ident">stride</span>: <span class="ident">Ixs</span>,
<span class="ident">inner_dim</span>: <span class="ident">D</span>,
<span class="ident">inner_strides</span>: <span class="ident">D</span>,
<span class="ident">ptr</span>: <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">A</span>,
}
<span class="macro">clone_bounds!</span>(
[<span class="ident">A</span>, <span class="ident">D</span>: <span class="ident">Clone</span>]
<span class="ident">OuterIterCore</span>[<span class="ident">A</span>, <span class="ident">D</span>] {
@<span class="ident">copy</span> {
<span class="ident">index</span>,
<span class="ident">len</span>,
<span class="ident">stride</span>,
<span class="ident">ptr</span>,
}
<span class="ident">inner_dim</span>,
<span class="ident">inner_strides</span>,
}
);
<span class="kw">fn</span> <span class="ident">new_outer_core</span><span class="op"><</span><span class="ident">A</span>, <span class="ident">S</span>, <span class="ident">D</span><span class="op">></span>(<span class="ident">v</span>: <span class="ident">ArrayBase</span><span class="op"><</span><span class="ident">S</span>, <span class="ident">D</span><span class="op">></span>, <span class="ident">axis</span>: <span class="ident">usize</span>)
<span class="op">-</span><span class="op">></span> <span class="ident">OuterIterCore</span><span class="op"><</span><span class="ident">A</span>, <span class="ident">D::Smaller</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">RemoveAxis</span>,
<span class="ident">S</span>: <span class="ident">Data</span><span class="op"><</span><span class="ident">Elem</span> <span class="op">=</span> <span class="ident">A</span><span class="op">></span>
{
<span class="kw">let</span> <span class="ident">shape</span> <span class="op">=</span> <span class="ident">v</span>.<span class="ident">shape</span>()[<span class="ident">axis</span>];
<span class="kw">let</span> <span class="ident">stride</span> <span class="op">=</span> <span class="ident">v</span>.<span class="ident">strides</span>()[<span class="ident">axis</span>];
<span class="ident">OuterIterCore</span> {
<span class="ident">index</span>: <span class="number">0</span>,
<span class="ident">len</span>: <span class="ident">shape</span>,
<span class="ident">stride</span>: <span class="ident">stride</span>,
<span class="ident">inner_dim</span>: <span class="ident">v</span>.<span class="ident">dim</span>.<span class="ident">remove_axis</span>(<span class="ident">Axis</span>(<span class="ident">axis</span>)),
<span class="ident">inner_strides</span>: <span class="ident">v</span>.<span class="ident">strides</span>.<span class="ident">remove_axis</span>(<span class="ident">Axis</span>(<span class="ident">axis</span>)),
<span class="ident">ptr</span>: <span class="ident">v</span>.<span class="ident">ptr</span>,
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">A</span>, <span class="ident">D</span><span class="op">></span> <span class="ident">OuterIterCore</span><span class="op"><</span><span class="ident">A</span>, <span class="ident">D</span><span class="op">></span> {
<span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">offset</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">index</span>: <span class="ident">usize</span>) <span class="op">-</span><span class="op">></span> <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">A</span> {
<span class="macro">debug_assert!</span>(<span class="ident">index</span> <span class="op"><</span><span class="op">=</span> <span class="self">self</span>.<span class="ident">len</span>,
<span class="string">"index={}, len={}, stride={}"</span>, <span class="ident">index</span>, <span class="self">self</span>.<span class="ident">len</span>, <span class="self">self</span>.<span class="ident">stride</span>);
<span class="self">self</span>.<span class="ident">ptr</span>.<span class="ident">offset</span>(<span class="ident">index</span> <span class="kw">as</span> <span class="ident">isize</span> <span class="op">*</span> <span class="self">self</span>.<span class="ident">stride</span>)
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">A</span>, <span class="ident">D</span><span class="op">></span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">OuterIterCore</span><span class="op"><</span><span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">Dimension</span>,
{
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">A</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="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="kw">if</span> <span class="self">self</span>.<span class="ident">index</span> <span class="op">></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="kw">let</span> <span class="ident">ptr</span> <span class="op">=</span> <span class="kw">unsafe</span> { <span class="self">self</span>.<span class="ident">offset</span>(<span class="self">self</span>.<span class="ident">index</span>) };
<span class="self">self</span>.<span class="ident">index</span> <span class="op">+</span><span class="op">=</span> <span class="number">1</span>;
<span class="prelude-val">Some</span>(<span class="ident">ptr</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="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">len</span> <span class="op">-</span> <span class="self">self</span>.<span class="ident">index</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">D</span><span class="op">></span> <span class="ident">DoubleEndedIterator</span> <span class="kw">for</span> <span class="ident">OuterIterCore</span><span class="op"><</span><span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">Dimension</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="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="kw">if</span> <span class="self">self</span>.<span class="ident">index</span> <span class="op">></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">len</span> <span class="op">-</span><span class="op">=</span> <span class="number">1</span>;
<span class="kw">let</span> <span class="ident">ptr</span> <span class="op">=</span> <span class="kw">unsafe</span> { <span class="self">self</span>.<span class="ident">offset</span>(<span class="self">self</span>.<span class="ident">len</span>) };
<span class="prelude-val">Some</span>(<span class="ident">ptr</span>)
}
}
}
<span class="doccomment">/// An iterator that traverses over an axis and</span>
<span class="doccomment">/// and yields each subview.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The outermost dimension is `Axis(0)`, created with `.outer_iter()`,</span>
<span class="doccomment">/// but you can traverse arbitrary dimension with `.axis_iter()`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// For example, in a 3 × 5 × 5 array, with `axis` equal to `Axis(2)`,</span>
<span class="doccomment">/// the iterator element is a 3 × 5 subview (and there are 5 in total).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Iterator element type is `ArrayView<'a, A, D>`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// See [`.outer_iter()`](../struct.ArrayBase.html#method.outer_iter)</span>
<span class="doccomment">/// or [`.axis_iter()`](../struct.ArrayBase.html#method.axis_iter)</span>
<span class="doccomment">/// for more information.</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">AxisIter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>: <span class="lifetime">'a</span>, <span class="ident">D</span><span class="op">></span> {
<span class="ident">iter</span>: <span class="ident">OuterIterCore</span><span class="op"><</span><span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>,
<span class="ident">life</span>: <span class="ident">PhantomData</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">A</span><span class="op">></span>,
}
<span class="macro">clone_bounds!</span>(
[<span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span>: <span class="ident">Clone</span>]
<span class="ident">AxisIter</span>[<span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span>] {
@<span class="ident">copy</span> {
<span class="ident">life</span>,
}
<span class="ident">iter</span>,
}
);
<span class="macro">macro_rules!</span> <span class="ident">outer_iter_split_at_impl</span> {
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">iter</span>: <span class="ident">ident</span>) <span class="op">=</span><span class="op">></span> (
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">Dimension</span>
{
<span class="doccomment">/// Split the iterator at index, yielding two disjoint iterators.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// *panics* if `index` is strictly greater than the iterator's length</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">split_at</span>(<span class="self">self</span>, <span class="ident">index</span>: <span class="ident">Ix</span>)
<span class="op">-</span><span class="op">></span> (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>)
{
<span class="macro">assert!</span>(<span class="ident">index</span> <span class="op"><</span><span class="op">=</span> <span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">len</span>);
<span class="kw">let</span> <span class="ident">right_ptr</span> <span class="op">=</span> <span class="kw">if</span> <span class="ident">index</span> <span class="op">!</span><span class="op">=</span> <span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">len</span> {
<span class="kw">unsafe</span> { <span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">offset</span>(<span class="ident">index</span>) }
}
<span class="kw">else</span> {
<span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">ptr</span>
};
<span class="kw">let</span> <span class="ident">left</span> <span class="op">=</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">iter</span> {
<span class="ident">iter</span>: <span class="ident">OuterIterCore</span> {
<span class="ident">index</span>: <span class="number">0</span>,
<span class="ident">len</span>: <span class="ident">index</span>,
<span class="ident">stride</span>: <span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">stride</span>,
<span class="ident">inner_dim</span>: <span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">inner_dim</span>.<span class="ident">clone</span>(),
<span class="ident">inner_strides</span>: <span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">inner_strides</span>.<span class="ident">clone</span>(),
<span class="ident">ptr</span>: <span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">ptr</span>,
},
<span class="ident">life</span>: <span class="self">self</span>.<span class="ident">life</span>,
};
<span class="kw">let</span> <span class="ident">right</span> <span class="op">=</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">iter</span> {
<span class="ident">iter</span>: <span class="ident">OuterIterCore</span> {
<span class="ident">index</span>: <span class="number">0</span>,
<span class="ident">len</span>: <span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">len</span> <span class="op">-</span> <span class="ident">index</span>,
<span class="ident">stride</span>: <span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">stride</span>,
<span class="ident">inner_dim</span>: <span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">inner_dim</span>,
<span class="ident">inner_strides</span>: <span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">inner_strides</span>,
<span class="ident">ptr</span>: <span class="ident">right_ptr</span>,
},
<span class="ident">life</span>: <span class="self">self</span>.<span class="ident">life</span>,
};
(<span class="ident">left</span>, <span class="ident">right</span>)
}
}
)
}
<span class="macro">outer_iter_split_at_impl!</span>(<span class="ident">AxisIter</span>);
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">AxisIter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">Dimension</span>
{
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="ident">ArrayView</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></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="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">ptr</span><span class="op">|</span> {
<span class="kw">unsafe</span> {
<span class="self">self</span>.<span class="ident">as_ref</span>(<span class="ident">ptr</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="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">D</span><span class="op">></span> <span class="ident">DoubleEndedIterator</span> <span class="kw">for</span> <span class="ident">AxisIter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">Dimension</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="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">ptr</span><span class="op">|</span> {
<span class="kw">unsafe</span> {
<span class="self">self</span>.<span class="ident">as_ref</span>(<span class="ident">ptr</span>)
}
})
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span> <span class="ident">ExactSizeIterator</span> <span class="kw">for</span> <span class="ident">AxisIter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">Dimension</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="op">></span> <span class="ident">usize</span> {
<span class="self">self</span>.<span class="ident">size_hint</span>().<span class="number">0</span>
}
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new_outer_iter</span><span class="op"><</span><span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>(<span class="ident">v</span>: <span class="ident">ArrayView</span><span class="op"><</span><span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>) <span class="op">-</span><span class="op">></span> <span class="ident">AxisIter</span><span class="op"><</span><span class="ident">A</span>, <span class="ident">D::Smaller</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">RemoveAxis</span>
{
<span class="ident">AxisIter</span> {
<span class="ident">iter</span>: <span class="ident">new_outer_core</span>(<span class="ident">v</span>, <span class="number">0</span>),
<span class="ident">life</span>: <span class="ident">PhantomData</span>,
}
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new_axis_iter</span><span class="op"><</span><span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>(<span class="ident">v</span>: <span class="ident">ArrayView</span><span class="op"><</span><span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>, <span class="ident">axis</span>: <span class="ident">usize</span>)
<span class="op">-</span><span class="op">></span> <span class="ident">AxisIter</span><span class="op"><</span><span class="ident">A</span>, <span class="ident">D::Smaller</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">RemoveAxis</span>
{
<span class="ident">AxisIter</span> {
<span class="ident">iter</span>: <span class="ident">new_outer_core</span>(<span class="ident">v</span>, <span class="ident">axis</span>),
<span class="ident">life</span>: <span class="ident">PhantomData</span>,
}
}
<span class="doccomment">/// An iterator that traverses over an axis and</span>
<span class="doccomment">/// and yields each subview (mutable)</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The outermost dimension is `Axis(0)`, created with `.outer_iter()`,</span>
<span class="doccomment">/// but you can traverse arbitrary dimension with `.axis_iter()`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// For example, in a 3 × 5 × 5 array, with `axis` equal to `Axis(2)`,</span>
<span class="doccomment">/// the iterator element is a 3 × 5 subview (and there are 5 in total).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Iterator element type is `ArrayViewMut<'a, A, D>`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// See [`.outer_iter_mut()`](../struct.ArrayBase.html#method.outer_iter_mut)</span>
<span class="doccomment">/// or [`.axis_iter_mut()`](../struct.ArrayBase.html#method.axis_iter_mut)</span>
<span class="doccomment">/// for more information.</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">AxisIterMut</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>: <span class="lifetime">'a</span>, <span class="ident">D</span><span class="op">></span> {
<span class="ident">iter</span>: <span class="ident">OuterIterCore</span><span class="op"><</span><span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>,
<span class="ident">life</span>: <span class="ident">PhantomData</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="op">></span>,
}
<span class="macro">outer_iter_split_at_impl!</span>(<span class="ident">AxisIterMut</span>);
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">AxisIterMut</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">Dimension</span>
{
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="ident">ArrayViewMut</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></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="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">ptr</span><span class="op">|</span> {
<span class="kw">unsafe</span> {
<span class="self">self</span>.<span class="ident">as_ref</span>(<span class="ident">ptr</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="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">D</span><span class="op">></span> <span class="ident">DoubleEndedIterator</span> <span class="kw">for</span> <span class="ident">AxisIterMut</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">Dimension</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="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">ptr</span><span class="op">|</span> {
<span class="kw">unsafe</span> {
<span class="self">self</span>.<span class="ident">as_ref</span>(<span class="ident">ptr</span>)
}
})
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span> <span class="ident">ExactSizeIterator</span> <span class="kw">for</span> <span class="ident">AxisIterMut</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">Dimension</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="op">></span> <span class="ident">usize</span> {
<span class="self">self</span>.<span class="ident">size_hint</span>().<span class="number">0</span>
}
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new_outer_iter_mut</span><span class="op"><</span><span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>(<span class="ident">v</span>: <span class="ident">ArrayViewMut</span><span class="op"><</span><span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>) <span class="op">-</span><span class="op">></span> <span class="ident">AxisIterMut</span><span class="op"><</span><span class="ident">A</span>, <span class="ident">D::Smaller</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">RemoveAxis</span>
{
<span class="ident">AxisIterMut</span> {
<span class="ident">iter</span>: <span class="ident">new_outer_core</span>(<span class="ident">v</span>, <span class="number">0</span>),
<span class="ident">life</span>: <span class="ident">PhantomData</span>,
}
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new_axis_iter_mut</span><span class="op"><</span><span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>(<span class="ident">v</span>: <span class="ident">ArrayViewMut</span><span class="op"><</span><span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>, <span class="ident">axis</span>: <span class="ident">usize</span>)
<span class="op">-</span><span class="op">></span> <span class="ident">AxisIterMut</span><span class="op"><</span><span class="ident">A</span>, <span class="ident">D::Smaller</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">RemoveAxis</span>
{
<span class="ident">AxisIterMut</span> {
<span class="ident">iter</span>: <span class="ident">new_outer_core</span>(<span class="ident">v</span>, <span class="ident">axis</span>),
<span class="ident">life</span>: <span class="ident">PhantomData</span>,
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span>: <span class="ident">Dimension</span><span class="op">></span> <span class="ident">NdProducer</span> <span class="kw">for</span> <span class="ident">AxisIter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>
{
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="op"><</span><span class="self">Self</span> <span class="kw">as</span> <span class="ident">Iterator</span><span class="op">></span><span class="ident">::Item</span>;
<span class="kw">type</span> <span class="ident">Dim</span> <span class="op">=</span> <span class="ident">Ix1</span>;
<span class="kw">type</span> <span class="ident">Ptr</span> <span class="op">=</span> <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">A</span>;
<span class="kw">type</span> <span class="ident">Stride</span> <span class="op">=</span> <span class="ident">isize</span>;
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
<span class="kw">fn</span> <span class="ident">layout</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">::Layout</span> {
<span class="ident">::Layout::one_dimensional</span>()
}
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
<span class="kw">fn</span> <span class="ident">raw_dim</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="self">Self</span><span class="ident">::Dim</span> {
<span class="ident">Ix1</span>(<span class="self">self</span>.<span class="ident">len</span>())
}
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
<span class="kw">fn</span> <span class="ident">as_ptr</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="self">Self</span><span class="ident">::Ptr</span> {
<span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">ptr</span>
}
<span class="kw">fn</span> <span class="ident">contiguous_stride</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">isize</span> {
<span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">stride</span>
}
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
<span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">as_ref</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">ptr</span>: <span class="self">Self</span><span class="ident">::Ptr</span>) <span class="op">-</span><span class="op">></span> <span class="self">Self</span><span class="ident">::Item</span> {
<span class="ident">ArrayView::new_</span>(<span class="ident">ptr</span>,
<span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">inner_dim</span>.<span class="ident">clone</span>(),
<span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">inner_strides</span>.<span class="ident">clone</span>())
}
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
<span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">uget_ptr</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">i</span>: <span class="kw-2">&</span><span class="self">Self</span><span class="ident">::Dim</span>) <span class="op">-</span><span class="op">></span> <span class="self">Self</span><span class="ident">::Ptr</span> {
<span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">ptr</span>.<span class="ident">offset</span>(<span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">stride</span> <span class="op">*</span> <span class="ident">i</span>[<span class="number">0</span>] <span class="kw">as</span> <span class="ident">isize</span>)
}
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
<span class="kw">fn</span> <span class="ident">stride_of</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">_axis</span>: <span class="ident">Axis</span>) <span class="op">-</span><span class="op">></span> <span class="ident">isize</span> {
<span class="self">self</span>.<span class="ident">contiguous_stride</span>()
}
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
<span class="kw">fn</span> <span class="ident">split_at</span>(<span class="self">self</span>, <span class="ident">_axis</span>: <span class="ident">Axis</span>, <span class="ident">index</span>: <span class="ident">usize</span>) <span class="op">-</span><span class="op">></span> (<span class="self">Self</span>, <span class="self">Self</span>) {
<span class="self">self</span>.<span class="ident">split_at</span>(<span class="ident">index</span>)
}
<span class="macro">private_impl!</span>{}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span>: <span class="ident">Dimension</span><span class="op">></span> <span class="ident">NdProducer</span> <span class="kw">for</span> <span class="ident">AxisIterMut</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>
{
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="op"><</span><span class="self">Self</span> <span class="kw">as</span> <span class="ident">Iterator</span><span class="op">></span><span class="ident">::Item</span>;
<span class="kw">type</span> <span class="ident">Dim</span> <span class="op">=</span> <span class="ident">Ix1</span>;
<span class="kw">type</span> <span class="ident">Ptr</span> <span class="op">=</span> <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">A</span>;
<span class="kw">type</span> <span class="ident">Stride</span> <span class="op">=</span> <span class="ident">isize</span>;
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
<span class="kw">fn</span> <span class="ident">layout</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">::Layout</span> {
<span class="ident">::Layout::one_dimensional</span>()
}
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
<span class="kw">fn</span> <span class="ident">raw_dim</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="self">Self</span><span class="ident">::Dim</span> {
<span class="ident">Ix1</span>(<span class="self">self</span>.<span class="ident">len</span>())
}
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
<span class="kw">fn</span> <span class="ident">as_ptr</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="self">Self</span><span class="ident">::Ptr</span> {
<span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">ptr</span>
}
<span class="kw">fn</span> <span class="ident">contiguous_stride</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">isize</span> {
<span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">stride</span>
}
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
<span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">as_ref</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">ptr</span>: <span class="self">Self</span><span class="ident">::Ptr</span>) <span class="op">-</span><span class="op">></span> <span class="self">Self</span><span class="ident">::Item</span> {
<span class="ident">ArrayViewMut::new_</span>(<span class="ident">ptr</span>,
<span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">inner_dim</span>.<span class="ident">clone</span>(),
<span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">inner_strides</span>.<span class="ident">clone</span>())
}
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
<span class="kw">unsafe</span> <span class="kw">fn</span> <span class="ident">uget_ptr</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">i</span>: <span class="kw-2">&</span><span class="self">Self</span><span class="ident">::Dim</span>) <span class="op">-</span><span class="op">></span> <span class="self">Self</span><span class="ident">::Ptr</span> {
<span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">ptr</span>.<span class="ident">offset</span>(<span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">stride</span> <span class="op">*</span> <span class="ident">i</span>[<span class="number">0</span>] <span class="kw">as</span> <span class="ident">isize</span>)
}
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
<span class="kw">fn</span> <span class="ident">stride_of</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">_axis</span>: <span class="ident">Axis</span>) <span class="op">-</span><span class="op">></span> <span class="ident">isize</span> {
<span class="self">self</span>.<span class="ident">contiguous_stride</span>()
}
<span class="attribute">#[<span class="ident">doc</span>(<span class="ident">hidden</span>)]</span>
<span class="kw">fn</span> <span class="ident">split_at</span>(<span class="self">self</span>, <span class="ident">_axis</span>: <span class="ident">Axis</span>, <span class="ident">index</span>: <span class="ident">usize</span>) <span class="op">-</span><span class="op">></span> (<span class="self">Self</span>, <span class="self">Self</span>) {
<span class="self">self</span>.<span class="ident">split_at</span>(<span class="ident">index</span>)
}
<span class="macro">private_impl!</span>{}
}
<span class="doccomment">/// An iterator that traverses over the specified axis</span>
<span class="doccomment">/// and yields views of the specified size on this axis.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// For example, in a 2 × 8 × 3 array, if the axis of iteration</span>
<span class="doccomment">/// is 1 and the chunk size is 2, the yielded elements</span>
<span class="doccomment">/// are 2 × 2 × 3 views (and there are 4 in total).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Iterator element type is `ArrayView<'a, A, D>`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// See [`.axis_chunks_iter()`](../struct.ArrayBase.html#method.axis_chunks_iter) for more information.</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">AxisChunksIter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>: <span class="lifetime">'a</span>, <span class="ident">D</span><span class="op">></span> {
<span class="ident">iter</span>: <span class="ident">OuterIterCore</span><span class="op"><</span><span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>,
<span class="ident">last_ptr</span>: <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">A</span>,
<span class="ident">last_dim</span>: <span class="ident">D</span>,
<span class="ident">life</span>: <span class="ident">PhantomData</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">A</span><span class="op">></span>,
}
<span class="macro">clone_bounds!</span>(
[<span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span>: <span class="ident">Clone</span>]
<span class="ident">AxisChunksIter</span>[<span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span>] {
@<span class="ident">copy</span> {
<span class="ident">life</span>,
<span class="ident">last_ptr</span>,
}
<span class="ident">iter</span>,
<span class="ident">last_dim</span>,
}
);
<span class="kw">fn</span> <span class="ident">chunk_iter_parts</span><span class="op"><</span><span class="ident">A</span>, <span class="ident">D</span>: <span class="ident">Dimension</span><span class="op">></span>(<span class="ident">v</span>: <span class="ident">ArrayView</span><span class="op"><</span><span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>, <span class="ident">axis</span>: <span class="ident">usize</span>, <span class="ident">size</span>: <span class="ident">usize</span>)
<span class="op">-</span><span class="op">></span> (<span class="ident">OuterIterCore</span><span class="op"><</span><span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>, <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">A</span>, <span class="ident">D</span>)
{
<span class="kw">let</span> <span class="ident">axis_len</span> <span class="op">=</span> <span class="ident">v</span>.<span class="ident">shape</span>()[<span class="ident">axis</span>];
<span class="kw">let</span> <span class="ident">size</span> <span class="op">=</span> <span class="kw">if</span> <span class="ident">size</span> <span class="op">></span> <span class="ident">axis_len</span> { <span class="ident">axis_len</span> } <span class="kw">else</span> { <span class="ident">size</span> };
<span class="kw">let</span> <span class="ident">last_index</span> <span class="op">=</span> <span class="ident">axis_len</span> <span class="op">/</span> <span class="ident">size</span>;
<span class="kw">let</span> <span class="ident">rem</span> <span class="op">=</span> <span class="ident">axis_len</span> <span class="op">%</span> <span class="ident">size</span>;
<span class="kw">let</span> <span class="ident">shape</span> <span class="op">=</span> <span class="kw">if</span> <span class="ident">rem</span> <span class="op">=</span><span class="op">=</span> <span class="number">0</span> { <span class="ident">last_index</span> } <span class="kw">else</span> { <span class="ident">last_index</span> <span class="op">+</span> <span class="number">1</span> };
<span class="kw">let</span> <span class="ident">stride</span> <span class="op">=</span> <span class="ident">v</span>.<span class="ident">strides</span>()[<span class="ident">axis</span>] <span class="op">*</span> <span class="ident">size</span> <span class="kw">as</span> <span class="ident">isize</span>;
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">inner_dim</span> <span class="op">=</span> <span class="ident">v</span>.<span class="ident">dim</span>.<span class="ident">clone</span>();
<span class="ident">inner_dim</span>.<span class="ident">slice_mut</span>()[<span class="ident">axis</span>] <span class="op">=</span> <span class="ident">size</span>;
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">last_dim</span> <span class="op">=</span> <span class="ident">v</span>.<span class="ident">dim</span>;
<span class="ident">last_dim</span>.<span class="ident">slice_mut</span>()[<span class="ident">axis</span>] <span class="op">=</span> <span class="kw">if</span> <span class="ident">rem</span> <span class="op">=</span><span class="op">=</span> <span class="number">0</span> { <span class="ident">size</span> } <span class="kw">else</span> { <span class="ident">rem</span> };
<span class="kw">let</span> <span class="ident">last_ptr</span> <span class="op">=</span> <span class="kw">if</span> <span class="ident">rem</span> <span class="op">!</span><span class="op">=</span> <span class="number">0</span> {
<span class="kw">unsafe</span> {
<span class="ident">v</span>.<span class="ident">ptr</span>.<span class="ident">offset</span>(<span class="ident">stride</span> <span class="op">*</span> <span class="ident">last_index</span> <span class="kw">as</span> <span class="ident">isize</span>)
}
}
<span class="kw">else</span> {
<span class="ident">v</span>.<span class="ident">ptr</span>
};
<span class="kw">let</span> <span class="ident">iter</span> <span class="op">=</span> <span class="ident">OuterIterCore</span> {
<span class="ident">index</span>: <span class="number">0</span>,
<span class="ident">len</span>: <span class="ident">shape</span>,
<span class="ident">stride</span>: <span class="ident">stride</span>,
<span class="ident">inner_dim</span>: <span class="ident">inner_dim</span>,
<span class="ident">inner_strides</span>: <span class="ident">v</span>.<span class="ident">strides</span>,
<span class="ident">ptr</span>: <span class="ident">v</span>.<span class="ident">ptr</span>,
};
(<span class="ident">iter</span>, <span class="ident">last_ptr</span>, <span class="ident">last_dim</span>)
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new_chunk_iter</span><span class="op"><</span><span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>(<span class="ident">v</span>: <span class="ident">ArrayView</span><span class="op"><</span><span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>, <span class="ident">axis</span>: <span class="ident">usize</span>, <span class="ident">size</span>: <span class="ident">usize</span>)
<span class="op">-</span><span class="op">></span> <span class="ident">AxisChunksIter</span><span class="op"><</span><span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">Dimension</span>
{
<span class="kw">let</span> (<span class="ident">iter</span>, <span class="ident">last_ptr</span>, <span class="ident">last_dim</span>) <span class="op">=</span> <span class="ident">chunk_iter_parts</span>(<span class="ident">v</span>, <span class="ident">axis</span>, <span class="ident">size</span>);
<span class="ident">AxisChunksIter</span> {
<span class="ident">iter</span>: <span class="ident">iter</span>,
<span class="ident">last_ptr</span>: <span class="ident">last_ptr</span>,
<span class="ident">last_dim</span>: <span class="ident">last_dim</span>,
<span class="ident">life</span>: <span class="ident">PhantomData</span>,
}
}
<span class="macro">macro_rules!</span> <span class="ident">chunk_iter_impl</span> {
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">iter</span>:<span class="ident">ident</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">array</span>:<span class="ident">ident</span>) <span class="op">=</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">D</span><span class="op">></span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">Dimension</span>
{
<span class="kw">fn</span> <span class="ident">get_subview</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">iter_item</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">A</span><span class="op">></span>)
<span class="op">-</span><span class="op">></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="macro-nonterminal">$</span><span class="macro-nonterminal">array</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span><span class="op">></span>
{
<span class="ident">iter_item</span>.<span class="ident">map</span>(<span class="op">|</span><span class="ident">ptr</span><span class="op">|</span> {
<span class="kw">if</span> <span class="ident">ptr</span> <span class="op">!</span><span class="op">=</span> <span class="self">self</span>.<span class="ident">last_ptr</span> {
<span class="kw">unsafe</span> {
<span class="macro-nonterminal">$</span><span class="macro-nonterminal">array::new_</span>(<span class="ident">ptr</span>,
<span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">inner_dim</span>.<span class="ident">clone</span>(),
<span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">inner_strides</span>.<span class="ident">clone</span>())
}
}
<span class="kw">else</span> {
<span class="kw">unsafe</span> {
<span class="macro-nonterminal">$</span><span class="macro-nonterminal">array::new_</span>(<span class="ident">ptr</span>,
<span class="self">self</span>.<span class="ident">last_dim</span>.<span class="ident">clone</span>(),
<span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">inner_strides</span>.<span class="ident">clone</span>())
}
}
})
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">Dimension</span>,
{
<span class="kw">type</span> <span class="ident">Item</span> <span class="op">=</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">array</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></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="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="kw">let</span> <span class="ident">res</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">next</span>();
<span class="self">self</span>.<span class="ident">get_subview</span>(<span class="ident">res</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="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">D</span><span class="op">></span> <span class="ident">DoubleEndedIterator</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">Dimension</span>,
{
<span class="kw">fn</span> <span class="ident">next_back</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="self">Self</span><span class="ident">::Item</span><span class="op">></span> {
<span class="kw">let</span> <span class="ident">res</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">iter</span>.<span class="ident">next_back</span>();
<span class="self">self</span>.<span class="ident">get_subview</span>(<span class="ident">res</span>)
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span> <span class="ident">ExactSizeIterator</span> <span class="kw">for</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">Dimension</span>,
{ }
)
}
<span class="doccomment">/// An iterator that traverses over the specified axis</span>
<span class="doccomment">/// and yields mutable views of the specified size on this axis.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// For example, in a 2 × 8 × 3 array, if the axis of iteration</span>
<span class="doccomment">/// is 1 and the chunk size is 2, the yielded elements</span>
<span class="doccomment">/// are 2 × 2 × 3 views (and there are 4 in total).</span>
<span class="doccomment">///</span>
<span class="doccomment">/// Iterator element type is `ArrayViewMut<'a, A, D>`.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// See [`.axis_chunks_iter_mut()`](../struct.ArrayBase.html#method.axis_chunks_iter_mut)</span>
<span class="doccomment">/// for more information.</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">AxisChunksIterMut</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>: <span class="lifetime">'a</span>, <span class="ident">D</span><span class="op">></span> {
<span class="ident">iter</span>: <span class="ident">OuterIterCore</span><span class="op"><</span><span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>,
<span class="ident">last_ptr</span>: <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">A</span>,
<span class="ident">last_dim</span>: <span class="ident">D</span>,
<span class="ident">life</span>: <span class="ident">PhantomData</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="op">></span>,
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new_chunk_iter_mut</span><span class="op"><</span><span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>(<span class="ident">v</span>: <span class="ident">ArrayViewMut</span><span class="op"><</span><span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>, <span class="ident">axis</span>: <span class="ident">usize</span>, <span class="ident">size</span>: <span class="ident">usize</span>)
<span class="op">-</span><span class="op">></span> <span class="ident">AxisChunksIterMut</span><span class="op"><</span><span class="ident">A</span>, <span class="ident">D</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">D</span>: <span class="ident">Dimension</span>
{
<span class="kw">let</span> (<span class="ident">iter</span>, <span class="ident">last_ptr</span>, <span class="ident">last_dim</span>) <span class="op">=</span> <span class="ident">chunk_iter_parts</span>(<span class="ident">v</span>.<span class="ident">into_view</span>(), <span class="ident">axis</span>, <span class="ident">size</span>);
<span class="ident">AxisChunksIterMut</span> {
<span class="ident">iter</span>: <span class="ident">iter</span>,
<span class="ident">last_ptr</span>: <span class="ident">last_ptr</span>,
<span class="ident">last_dim</span>: <span class="ident">last_dim</span>,
<span class="ident">life</span>: <span class="ident">PhantomData</span>,
}
}
<span class="macro">chunk_iter_impl!</span>(<span class="ident">AxisChunksIter</span>, <span class="ident">ArrayView</span>);
<span class="macro">chunk_iter_impl!</span>(<span class="ident">AxisChunksIterMut</span>, <span class="ident">ArrayViewMut</span>);
<span class="macro">send_sync_read_only!</span>(<span class="ident">Iter</span>);
<span class="macro">send_sync_read_only!</span>(<span class="ident">IndexedIter</span>);
<span class="macro">send_sync_read_only!</span>(<span class="ident">LanesIter</span>);
<span class="macro">send_sync_read_only!</span>(<span class="ident">AxisIter</span>);
<span class="macro">send_sync_read_only!</span>(<span class="ident">AxisChunksIter</span>);
<span class="macro">send_sync_read_only!</span>(<span class="ident">ElementsBase</span>);
<span class="macro">send_sync_read_write!</span>(<span class="ident">IterMut</span>);
<span class="macro">send_sync_read_write!</span>(<span class="ident">IndexedIterMut</span>);
<span class="macro">send_sync_read_write!</span>(<span class="ident">LanesIterMut</span>);
<span class="macro">send_sync_read_write!</span>(<span class="ident">AxisIterMut</span>);
<span class="macro">send_sync_read_write!</span>(<span class="ident">AxisChunksIterMut</span>);
<span class="macro">send_sync_read_write!</span>(<span class="ident">ElementsBaseMut</span>);
<span class="doccomment">/// (Trait used internally) An iterator that we trust</span>
<span class="doccomment">/// to deliver exactly as many items as it said it would.</span>
<span class="kw">pub</span> <span class="kw">unsafe</span> <span class="kw">trait</span> <span class="ident">TrustedIterator</span> { }
<span class="kw">use</span> <span class="ident">std</span>;
<span class="kw">use</span> <span class="ident">linspace::Linspace</span>;
<span class="kw">use</span> <span class="ident">iter::IndicesIter</span>;
<span class="kw">use</span> <span class="ident">indexes::IndicesIterF</span>;
<span class="kw">unsafe</span> <span class="kw">impl</span><span class="op"><</span><span class="ident">F</span><span class="op">></span> <span class="ident">TrustedIterator</span> <span class="kw">for</span> <span class="ident">Linspace</span><span class="op"><</span><span class="ident">F</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">D</span><span class="op">></span> <span class="ident">TrustedIterator</span> <span class="kw">for</span> <span class="ident">Iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">A</span>, <span class="ident">D</span><span class="op">></span> { }
<span class="kw">unsafe</span> <span class="kw">impl</span><span class="op"><</span><span class="ident">I</span>, <span class="ident">F</span><span class="op">></span> <span class="ident">TrustedIterator</span> <span class="kw">for</span> <span class="ident">std::iter::Map</span><span class="op"><</span><span class="ident">I</span>, <span class="ident">F</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">I</span>: <span class="ident">TrustedIterator</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="op">></span> <span class="ident">TrustedIterator</span> <span class="kw">for</span> <span class="ident">slice::Iter</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="ident">TrustedIterator</span> <span class="kw">for</span> <span class="ident">::std::ops::Range</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span> { }
<span class="comment">// FIXME: These indices iter are dubious -- size needs to be checked up front.</span>
<span class="kw">unsafe</span> <span class="kw">impl</span><span class="op"><</span><span class="ident">D</span><span class="op">></span> <span class="ident">TrustedIterator</span> <span class="kw">for</span> <span class="ident">IndicesIter</span><span class="op"><</span><span class="ident">D</span><span class="op">></span> <span class="kw">where</span> <span class="ident">D</span>: <span class="ident">Dimension</span> { }
<span class="kw">unsafe</span> <span class="kw">impl</span><span class="op"><</span><span class="ident">D</span><span class="op">></span> <span class="ident">TrustedIterator</span> <span class="kw">for</span> <span class="ident">IndicesIterF</span><span class="op"><</span><span class="ident">D</span><span class="op">></span> <span class="kw">where</span> <span class="ident">D</span>: <span class="ident">Dimension</span> { }
<span class="doccomment">/// Like Iterator::collect, but only for trusted length iterators</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">to_vec</span><span class="op"><</span><span class="ident">I</span><span class="op">></span>(<span class="ident">iter</span>: <span class="ident">I</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Vec</span><span class="op"><</span><span class="ident">I::Item</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">I</span>: <span class="ident">TrustedIterator</span> <span class="op">+</span> <span class="ident">ExactSizeIterator</span>
{
<span class="ident">to_vec_mapped</span>(<span class="ident">iter</span>, <span class="op">|</span><span class="ident">x</span><span class="op">|</span> <span class="ident">x</span>)
}
<span class="doccomment">/// Like Iterator::collect, but only for trusted length iterators</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">to_vec_mapped</span><span class="op"><</span><span class="ident">I</span>, <span class="ident">F</span>, <span class="ident">B</span><span class="op">></span>(<span class="ident">iter</span>: <span class="ident">I</span>, <span class="kw-2">mut</span> <span class="ident">f</span>: <span class="ident">F</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Vec</span><span class="op"><</span><span class="ident">B</span><span class="op">></span>
<span class="kw">where</span> <span class="ident">I</span>: <span class="ident">TrustedIterator</span> <span class="op">+</span> <span class="ident">ExactSizeIterator</span>,
<span class="ident">F</span>: <span class="ident">FnMut</span>(<span class="ident">I::Item</span>) <span class="op">-</span><span class="op">></span> <span class="ident">B</span>,
{
<span class="comment">// Use an `unsafe` block to do this efficiently.</span>
<span class="comment">// We know that iter will produce exactly .size() elements,</span>
<span class="comment">// and the loop can vectorize if it's clean (without branch to grow the vector).</span>
<span class="kw">let</span> (<span class="ident">size</span>, <span class="kw">_</span>) <span class="op">=</span> <span class="ident">iter</span>.<span class="ident">size_hint</span>();
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">result</span> <span class="op">=</span> <span class="ident">Vec::with_capacity</span>(<span class="ident">size</span>);
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">out_ptr</span> <span class="op">=</span> <span class="ident">result</span>.<span class="ident">as_mut_ptr</span>();
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">len</span> <span class="op">=</span> <span class="number">0</span>;
<span class="ident">iter</span>.<span class="ident">fold</span>((), <span class="op">|</span>(), <span class="ident">elt</span><span class="op">|</span> {
<span class="kw">unsafe</span> {
<span class="ident">ptr::write</span>(<span class="ident">out_ptr</span>, <span class="ident">f</span>(<span class="ident">elt</span>));
<span class="ident">len</span> <span class="op">+</span><span class="op">=</span> <span class="number">1</span>;
<span class="ident">result</span>.<span class="ident">set_len</span>(<span class="ident">len</span>);
<span class="ident">out_ptr</span> <span class="op">=</span> <span class="ident">out_ptr</span>.<span class="ident">offset</span>(<span class="number">1</span>);
}
});
<span class="macro">debug_assert_eq!</span>(<span class="ident">size</span>, <span class="ident">result</span>.<span class="ident">len</span>());
<span class="ident">result</span>
}
</pre></div>
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