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</pre><pre class="rust">
<span class="kw">use</span> <span class="ident">Dimension</span>;
<span class="kw">use</span> {<span class="ident">Shape</span>, <span class="ident">StrideShape</span>};
<span class="kw">use</span> <span class="ident">dimension::IntoDimension</span>;
<span class="doccomment">/// A trait for `Shape` and `D where D: Dimension` that allows</span>
<span class="doccomment">/// customizing the memory layout (strides) of an array shape.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// This trait is used together with array constructor methods like</span>
<span class="doccomment">/// `Array::from_shape_vec`.</span>
<span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">ShapeBuilder</span> {
<span class="kw">type</span> <span class="ident">Dim</span>: <span class="ident">Dimension</span>;
<span class="kw">type</span> <span class="ident">Strides</span>;
<span class="kw">fn</span> <span class="ident">into_shape</span>(<span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Shape</span><span class="op"><</span><span class="self">Self</span><span class="ident">::Dim</span><span class="op">></span>;
<span class="kw">fn</span> <span class="ident">f</span>(<span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Shape</span><span class="op"><</span><span class="self">Self</span><span class="ident">::Dim</span><span class="op">></span>;
<span class="kw">fn</span> <span class="ident">set_f</span>(<span class="self">self</span>, <span class="ident">is_f</span>: <span class="ident">bool</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Shape</span><span class="op"><</span><span class="self">Self</span><span class="ident">::Dim</span><span class="op">></span>;
<span class="kw">fn</span> <span class="ident">strides</span>(<span class="self">self</span>, <span class="ident">strides</span>: <span class="self">Self</span><span class="ident">::Strides</span>) <span class="op">-</span><span class="op">></span> <span class="ident">StrideShape</span><span class="op"><</span><span class="self">Self</span><span class="ident">::Dim</span><span class="op">></span>;
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">D</span><span class="op">></span> <span class="ident">From</span><span class="op"><</span><span class="ident">D</span><span class="op">></span> <span class="kw">for</span> <span class="ident">Shape</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">/// Create a `Shape` from `dimension`, using the default memory layout.</span>
<span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">dimension</span>: <span class="ident">D</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Shape</span><span class="op"><</span><span class="ident">D</span><span class="op">></span> {
<span class="ident">dimension</span>.<span class="ident">into_shape</span>()
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span>, <span class="ident">D</span><span class="op">></span> <span class="ident">From</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="kw">for</span> <span class="ident">StrideShape</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="ident">T</span>: <span class="ident">ShapeBuilder</span><span class="op"><</span><span class="ident">Dim</span><span class="op">=</span><span class="ident">D</span><span class="op">></span>,
{
<span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">value</span>: <span class="ident">T</span>) <span class="op">-</span><span class="op">></span> <span class="self">Self</span> {
<span class="kw">let</span> <span class="ident">shape</span> <span class="op">=</span> <span class="ident">value</span>.<span class="ident">into_shape</span>();
<span class="kw">let</span> <span class="ident">d</span> <span class="op">=</span> <span class="ident">shape</span>.<span class="ident">dim</span>;
<span class="kw">let</span> <span class="ident">st</span> <span class="op">=</span> <span class="kw">if</span> <span class="ident">shape</span>.<span class="ident">is_c</span> { <span class="ident">d</span>.<span class="ident">default_strides</span>() } <span class="kw">else</span> { <span class="ident">d</span>.<span class="ident">fortran_strides</span>() };
<span class="ident">StrideShape</span> {
<span class="ident">strides</span>: <span class="ident">st</span>,
<span class="ident">dim</span>: <span class="ident">d</span>,
<span class="ident">custom</span>: <span class="bool-val">false</span>,
}
}
}
<span class="comment">/*
impl<D> From<Shape<D>> for StrideShape<D>
where D: Dimension
{
fn from(shape: Shape<D>) -> Self {
let d = shape.dim;
let st = if shape.is_c { d.default_strides() } else { d.fortran_strides() };
StrideShape {
strides: st,
dim: d,
custom: false,
}
}
}
*/</span>
<span class="kw">impl</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> <span class="ident">ShapeBuilder</span> <span class="kw">for</span> <span class="ident">T</span>
<span class="kw">where</span> <span class="ident">T</span>: <span class="ident">IntoDimension</span>
{
<span class="kw">type</span> <span class="ident">Dim</span> <span class="op">=</span> <span class="ident">T::Dim</span>;
<span class="kw">type</span> <span class="ident">Strides</span> <span class="op">=</span> <span class="ident">T</span>;
<span class="kw">fn</span> <span class="ident">into_shape</span>(<span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Shape</span><span class="op"><</span><span class="self">Self</span><span class="ident">::Dim</span><span class="op">></span> {
<span class="ident">Shape</span> {
<span class="ident">dim</span>: <span class="self">self</span>.<span class="ident">into_dimension</span>(),
<span class="ident">is_c</span>: <span class="bool-val">true</span>,
}
}
<span class="kw">fn</span> <span class="ident">f</span>(<span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Shape</span><span class="op"><</span><span class="self">Self</span><span class="ident">::Dim</span><span class="op">></span> { <span class="self">self</span>.<span class="ident">set_f</span>(<span class="bool-val">true</span>) }
<span class="kw">fn</span> <span class="ident">set_f</span>(<span class="self">self</span>, <span class="ident">is_f</span>: <span class="ident">bool</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Shape</span><span class="op"><</span><span class="self">Self</span><span class="ident">::Dim</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">into_shape</span>().<span class="ident">set_f</span>(<span class="ident">is_f</span>)
}
<span class="kw">fn</span> <span class="ident">strides</span>(<span class="self">self</span>, <span class="ident">st</span>: <span class="ident">T</span>) <span class="op">-</span><span class="op">></span> <span class="ident">StrideShape</span><span class="op"><</span><span class="self">Self</span><span class="ident">::Dim</span><span class="op">></span> {
<span class="self">self</span>.<span class="ident">into_shape</span>().<span class="ident">strides</span>(<span class="ident">st</span>.<span class="ident">into_dimension</span>())
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">D</span><span class="op">></span> <span class="ident">ShapeBuilder</span> <span class="kw">for</span> <span class="ident">Shape</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">type</span> <span class="ident">Dim</span> <span class="op">=</span> <span class="ident">D</span>;
<span class="kw">type</span> <span class="ident">Strides</span> <span class="op">=</span> <span class="ident">D</span>;
<span class="kw">fn</span> <span class="ident">into_shape</span>(<span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Shape</span><span class="op"><</span><span class="ident">D</span><span class="op">></span> { <span class="self">self</span> }
<span class="kw">fn</span> <span class="ident">f</span>(<span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="self">Self</span> { <span class="self">self</span>.<span class="ident">set_f</span>(<span class="bool-val">true</span>) }
<span class="kw">fn</span> <span class="ident">set_f</span>(<span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">is_f</span>: <span class="ident">bool</span>) <span class="op">-</span><span class="op">></span> <span class="self">Self</span> {
<span class="self">self</span>.<span class="ident">is_c</span> <span class="op">=</span> <span class="op">!</span><span class="ident">is_f</span>;
<span class="self">self</span>
}
<span class="kw">fn</span> <span class="ident">strides</span>(<span class="self">self</span>, <span class="ident">st</span>: <span class="ident">D</span>) <span class="op">-</span><span class="op">></span> <span class="ident">StrideShape</span><span class="op"><</span><span class="ident">D</span><span class="op">></span> {
<span class="ident">StrideShape</span> {
<span class="ident">dim</span>: <span class="self">self</span>.<span class="ident">dim</span>,
<span class="ident">strides</span>: <span class="ident">st</span>,
<span class="ident">custom</span>: <span class="bool-val">true</span>,
}
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">D</span><span class="op">></span> <span class="ident">Shape</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="comment">// Return a reference to the dimension</span>
<span class="comment">//pub fn dimension(&self) -> &D { &self.dim }</span>
<span class="doccomment">/// Return the size of the shape in number of elements</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">size</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">dim</span>.<span class="ident">size</span>() }
}
</pre></div>
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