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</pre><pre class="rust ">
<span class="kw">use</span> <span class="ident">avl</span>::{<span class="ident">Iter</span>, <span class="ident">Tree</span>};
<span class="kw">use</span> <span class="ident">std</span>::{
<span class="ident">borrow</span>::<span class="ident">Borrow</span>,
<span class="ident">cmp</span>::{<span class="ident">Eq</span>, <span class="ident">Ord</span>, <span class="ident">Ordering</span>, <span class="ident">PartialEq</span>, <span class="ident">PartialOrd</span>},
<span class="ident">default</span>::<span class="ident">Default</span>,
<span class="ident">fmt</span>::{<span class="self">self</span>, <span class="ident">Debug</span>, <span class="ident">Formatter</span>},
<span class="ident">hash</span>::{<span class="ident">Hash</span>, <span class="ident">Hasher</span>},
<span class="ident">iter</span>::<span class="ident">FromIterator</span>,
<span class="ident">ops</span>::<span class="ident">Bound</span>,
};
<span class="doccomment">/// This set uses a similar strategy to BTreeSet to ensure cache</span>
<span class="doccomment">/// efficient performance on modern hardware while still providing</span>
<span class="doccomment">/// log(N) get, insert, and remove operations.</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::string::String;</span>
<span class="doccomment">/// use self::immutable_chunkmap::set::Set;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let m =</span>
<span class="doccomment">/// Set::new()</span>
<span class="doccomment">/// .insert(String::from("1")).0</span>
<span class="doccomment">/// .insert(String::from("2")).0</span>
<span class="doccomment">/// .insert(String::from("3")).0;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// assert_eq!(m.contains("1"), true);</span>
<span class="doccomment">/// assert_eq!(m.contains("2"), true);</span>
<span class="doccomment">/// assert_eq!(m.contains("3"), true);</span>
<span class="doccomment">/// assert_eq!(m.contains("4"), false);</span>
<span class="doccomment">///</span>
<span class="doccomment">/// for k in &m { println!("{}", k) }</span>
<span class="doccomment">/// ```</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">Set</span><span class="op"><</span><span class="ident">K</span>: <span class="ident">Ord</span> <span class="op">+</span> <span class="ident">Clone</span><span class="op">></span>(<span class="ident">Tree</span><span class="op"><</span><span class="ident">K</span>, ()<span class="op">></span>);
<span class="kw">impl</span><span class="op"><</span><span class="ident">K</span><span class="op">></span> <span class="ident">Hash</span> <span class="kw">for</span> <span class="ident">Set</span><span class="op"><</span><span class="ident">K</span><span class="op">></span>
<span class="kw">where</span>
<span class="ident">K</span>: <span class="ident">Hash</span> <span class="op">+</span> <span class="ident">Ord</span> <span class="op">+</span> <span class="ident">Clone</span>,
{
<span class="kw">fn</span> <span class="ident">hash</span><span class="op"><</span><span class="ident">H</span>: <span class="ident">Hasher</span><span class="op">></span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">state</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">H</span>) {
<span class="self">self</span>.<span class="number">0</span>.<span class="ident">hash</span>(<span class="ident">state</span>)
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">K</span><span class="op">></span> <span class="ident">Default</span> <span class="kw">for</span> <span class="ident">Set</span><span class="op"><</span><span class="ident">K</span><span class="op">></span>
<span class="kw">where</span>
<span class="ident">K</span>: <span class="ident">Ord</span> <span class="op">+</span> <span class="ident">Clone</span>,
{
<span class="kw">fn</span> <span class="ident">default</span>() <span class="op">-></span> <span class="ident">Set</span><span class="op"><</span><span class="ident">K</span><span class="op">></span> {
<span class="ident">Set</span>::<span class="ident">new</span>()
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">K</span><span class="op">></span> <span class="ident">PartialEq</span> <span class="kw">for</span> <span class="ident">Set</span><span class="op"><</span><span class="ident">K</span><span class="op">></span>
<span class="kw">where</span>
<span class="ident">K</span>: <span class="ident">Ord</span> <span class="op">+</span> <span class="ident">Clone</span>,
{
<span class="kw">fn</span> <span class="ident">eq</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">other</span>: <span class="kw-2">&</span><span class="ident">Set</span><span class="op"><</span><span class="ident">K</span><span class="op">></span>) <span class="op">-></span> <span class="ident">bool</span> {
<span class="self">self</span>.<span class="number">0</span> <span class="op">==</span> <span class="ident">other</span>.<span class="number">0</span>
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">K</span><span class="op">></span> <span class="ident">Eq</span> <span class="kw">for</span> <span class="ident">Set</span><span class="op"><</span><span class="ident">K</span><span class="op">></span> <span class="kw">where</span> <span class="ident">K</span>: <span class="ident">Eq</span> <span class="op">+</span> <span class="ident">Ord</span> <span class="op">+</span> <span class="ident">Clone</span> {}
<span class="kw">impl</span><span class="op"><</span><span class="ident">K</span><span class="op">></span> <span class="ident">PartialOrd</span> <span class="kw">for</span> <span class="ident">Set</span><span class="op"><</span><span class="ident">K</span><span class="op">></span>
<span class="kw">where</span>
<span class="ident">K</span>: <span class="ident">Ord</span> <span class="op">+</span> <span class="ident">Clone</span>,
{
<span class="kw">fn</span> <span class="ident">partial_cmp</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">other</span>: <span class="kw-2">&</span><span class="ident">Set</span><span class="op"><</span><span class="ident">K</span><span class="op">></span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Ordering</span><span class="op">></span> {
<span class="self">self</span>.<span class="number">0</span>.<span class="ident">partial_cmp</span>(<span class="kw-2">&</span><span class="ident">other</span>.<span class="number">0</span>)
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">K</span><span class="op">></span> <span class="ident">Ord</span> <span class="kw">for</span> <span class="ident">Set</span><span class="op"><</span><span class="ident">K</span><span class="op">></span>
<span class="kw">where</span>
<span class="ident">K</span>: <span class="ident">Ord</span> <span class="op">+</span> <span class="ident">Clone</span>,
{
<span class="kw">fn</span> <span class="ident">cmp</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">other</span>: <span class="kw-2">&</span><span class="ident">Set</span><span class="op"><</span><span class="ident">K</span><span class="op">></span>) <span class="op">-></span> <span class="ident">Ordering</span> {
<span class="self">self</span>.<span class="number">0</span>.<span class="ident">cmp</span>(<span class="kw-2">&</span><span class="ident">other</span>.<span class="number">0</span>)
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">K</span><span class="op">></span> <span class="ident">Debug</span> <span class="kw">for</span> <span class="ident">Set</span><span class="op"><</span><span class="ident">K</span><span class="op">></span>
<span class="kw">where</span>
<span class="ident">K</span>: <span class="ident">Debug</span> <span class="op">+</span> <span class="ident">Ord</span> <span class="op">+</span> <span class="ident">Clone</span>,
{
<span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
<span class="ident">f</span>.<span class="ident">debug_set</span>().<span class="ident">entries</span>(<span class="self">self</span>.<span class="ident">into_iter</span>()).<span class="ident">finish</span>()
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">K</span><span class="op">></span> <span class="ident">FromIterator</span><span class="op"><</span><span class="ident">K</span><span class="op">></span> <span class="kw">for</span> <span class="ident">Set</span><span class="op"><</span><span class="ident">K</span><span class="op">></span>
<span class="kw">where</span>
<span class="ident">K</span>: <span class="ident">Ord</span> <span class="op">+</span> <span class="ident">Clone</span>,
{
<span class="kw">fn</span> <span class="ident">from_iter</span><span class="op"><</span><span class="ident">T</span>: <span class="ident">IntoIterator</span><span class="op"><</span><span class="ident">Item</span> <span class="op">=</span> <span class="ident">K</span><span class="op">>></span>(<span class="ident">iter</span>: <span class="ident">T</span>) <span class="op">-></span> <span class="self">Self</span> {
<span class="ident">Set</span>::<span class="ident">new</span>().<span class="ident">insert_many</span>(<span class="ident">iter</span>)
}
}
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">SetIter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">Q</span>: <span class="ident">Ord</span>, <span class="ident">K</span>: <span class="lifetime">'a</span> <span class="op">+</span> <span class="ident">Clone</span> <span class="op">+</span> <span class="ident">Ord</span> <span class="op">+</span> <span class="ident">Borrow</span><span class="op"><</span><span class="ident">Q</span><span class="op">>></span>(<span class="ident">Iter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">Q</span>, <span class="ident">K</span>, ()<span class="op">></span>);
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">Q</span>, <span class="ident">K</span><span class="op">></span> <span class="ident">Iterator</span> <span class="kw">for</span> <span class="ident">SetIter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">Q</span>, <span class="ident">K</span><span class="op">></span>
<span class="kw">where</span>
<span class="ident">Q</span>: <span class="ident">Ord</span>,
<span class="ident">K</span>: <span class="lifetime">'a</span> <span class="op">+</span> <span class="ident">Clone</span> <span class="op">+</span> <span class="ident">Ord</span> <span class="op">+</span> <span class="ident">Borrow</span><span class="op"><</span><span class="ident">Q</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">K</span>;
<span class="kw">fn</span> <span class="ident">next</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="self">Self</span>::<span class="ident">Item</span><span class="op">></span> {
<span class="self">self</span>.<span class="number">0</span>.<span class="ident">next</span>().<span class="ident">map</span>(<span class="op">|</span>(<span class="ident">k</span>, ())<span class="op">|</span> <span class="ident">k</span>)
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">Q</span>, <span class="ident">K</span><span class="op">></span> <span class="ident">DoubleEndedIterator</span> <span class="kw">for</span> <span class="ident">SetIter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">Q</span>, <span class="ident">K</span><span class="op">></span>
<span class="kw">where</span>
<span class="ident">Q</span>: <span class="ident">Ord</span>,
<span class="ident">K</span>: <span class="lifetime">'a</span> <span class="op">+</span> <span class="ident">Clone</span> <span class="op">+</span> <span class="ident">Ord</span> <span class="op">+</span> <span class="ident">Borrow</span><span class="op"><</span><span class="ident">Q</span><span class="op">></span>,
{
<span class="kw">fn</span> <span class="ident">next_back</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="self">Self</span>::<span class="ident">Item</span><span class="op">></span> {
<span class="self">self</span>.<span class="number">0</span>.<span class="ident">next_back</span>().<span class="ident">map</span>(<span class="op">|</span>(<span class="ident">k</span>, ())<span class="op">|</span> <span class="ident">k</span>)
}
}
<span class="kw">impl</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">K</span><span class="op">></span> <span class="ident">IntoIterator</span> <span class="kw">for</span> <span class="kw-2">&</span><span class="lifetime">'a</span> <span class="ident">Set</span><span class="op"><</span><span class="ident">K</span><span class="op">></span>
<span class="kw">where</span>
<span class="ident">K</span>: <span class="lifetime">'a</span> <span class="op">+</span> <span class="ident">Borrow</span><span class="op"><</span><span class="ident">K</span><span class="op">></span> <span class="op">+</span> <span class="ident">Ord</span> <span class="op">+</span> <span class="ident">Clone</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">K</span>;
<span class="kw">type</span> <span class="ident">IntoIter</span> <span class="op">=</span> <span class="ident">SetIter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">K</span>, <span class="ident">K</span><span class="op">></span>;
<span class="kw">fn</span> <span class="ident">into_iter</span>(<span class="self">self</span>) <span class="op">-></span> <span class="self">Self</span>::<span class="ident">IntoIter</span> {
<span class="ident">SetIter</span>(<span class="self">self</span>.<span class="number">0</span>.<span class="ident">into_iter</span>())
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">K</span><span class="op">></span> <span class="ident">Set</span><span class="op"><</span><span class="ident">K</span><span class="op">></span>
<span class="kw">where</span>
<span class="ident">K</span>: <span class="ident">Ord</span> <span class="op">+</span> <span class="ident">Clone</span>,
{
<span class="doccomment">/// Create a new empty set</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>() <span class="op">-></span> <span class="self">Self</span> {
<span class="ident">Set</span>(<span class="ident">Tree</span>::<span class="ident">new</span>())
}
<span class="doccomment">/// This will insert many elements at once, and is</span>
<span class="doccomment">/// potentially a lot faster than inserting one by one,</span>
<span class="doccomment">/// especially if the data is sorted.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// #Examples</span>
<span class="doccomment">///```</span>
<span class="doccomment">/// use self::immutable_chunkmap::set::Set;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let mut v = vec![1, 10, -12, 44, 50];</span>
<span class="doccomment">/// v.sort_unstable();</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let m = Set::new().insert_many(v.iter().map(|k| *k));</span>
<span class="doccomment">///</span>
<span class="doccomment">/// for k in &v {</span>
<span class="doccomment">/// assert_eq!(m.contains(k), true)</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// ```</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">insert_many</span><span class="op"><</span><span class="ident">E</span>: <span class="ident">IntoIterator</span><span class="op"><</span><span class="ident">Item</span> <span class="op">=</span> <span class="ident">K</span><span class="op">>></span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">elts</span>: <span class="ident">E</span>) <span class="op">-></span> <span class="self">Self</span> {
<span class="kw">let</span> <span class="ident">root</span> <span class="op">=</span> <span class="self">self</span>.<span class="number">0</span>.<span class="ident">insert_many</span>(<span class="ident">elts</span>.<span class="ident">into_iter</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">k</span><span class="op">|</span> (<span class="ident">k</span>, ())));
<span class="ident">Set</span>(<span class="ident">root</span>)
}
<span class="doccomment">/// Remove multiple elements in a single pass. Similar performance</span>
<span class="doccomment">/// to insert_many.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">remove_many</span><span class="op"><</span><span class="ident">Q</span>, <span class="ident">E</span><span class="op">></span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">elts</span>: <span class="ident">E</span>) <span class="op">-></span> <span class="self">Self</span>
<span class="kw">where</span>
<span class="ident">Q</span>: <span class="ident">Ord</span>,
<span class="ident">K</span>: <span class="ident">Borrow</span><span class="op"><</span><span class="ident">Q</span><span class="op">></span>,
<span class="ident">E</span>: <span class="ident">IntoIterator</span><span class="op"><</span><span class="ident">Item</span> <span class="op">=</span> <span class="ident">Q</span><span class="op">></span>,
{
<span class="kw">let</span> <span class="ident">root</span> <span class="op">=</span> <span class="self">self</span>
.<span class="number">0</span>
.<span class="ident">update_many</span>(<span class="ident">elts</span>.<span class="ident">into_iter</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">k</span><span class="op">|</span> (<span class="ident">k</span>, ())), <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="op">|</span><span class="kw">_</span>, <span class="kw">_</span>, <span class="kw">_</span><span class="op">|</span> <span class="prelude-val">None</span>);
<span class="ident">Set</span>(<span class="ident">root</span>)
}
<span class="doccomment">/// This is just slightly wierd, however if you have a bunch of</span>
<span class="doccomment">/// borrowed forms of members of the set, and you want to look at</span>
<span class="doccomment">/// the real entries and possibly add/update/remove them, then</span>
<span class="doccomment">/// this method is for you.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">update_many</span><span class="op"><</span><span class="ident">Q</span>, <span class="ident">E</span>, <span class="ident">F</span><span class="op">></span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">elts</span>: <span class="ident">E</span>, <span class="kw-2">mut</span> <span class="ident">f</span>: <span class="ident">F</span>) <span class="op">-></span> <span class="self">Self</span>
<span class="kw">where</span>
<span class="ident">Q</span>: <span class="ident">Ord</span>,
<span class="ident">K</span>: <span class="ident">Borrow</span><span class="op"><</span><span class="ident">Q</span><span class="op">></span>,
<span class="ident">E</span>: <span class="ident">IntoIterator</span><span class="op"><</span><span class="ident">Item</span> <span class="op">=</span> <span class="ident">Q</span><span class="op">></span>,
<span class="ident">F</span>: <span class="ident">FnMut</span>(<span class="ident">Q</span>, <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">K</span><span class="op">></span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">K</span><span class="op">></span>,
{
<span class="kw">let</span> <span class="ident">root</span> <span class="op">=</span> <span class="self">self</span>
.<span class="number">0</span>
.<span class="ident">update_many</span>(<span class="ident">elts</span>.<span class="ident">into_iter</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">k</span><span class="op">|</span> (<span class="ident">k</span>, ())), <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="op">|</span><span class="ident">q</span>, (), <span class="ident">cur</span><span class="op">|</span> {
<span class="kw">let</span> <span class="ident">cur</span> <span class="op">=</span> <span class="ident">cur</span>.<span class="ident">map</span>(<span class="op">|</span>(<span class="ident">k</span>, ())<span class="op">|</span> <span class="ident">k</span>);
<span class="ident">f</span>(<span class="ident">q</span>, <span class="ident">cur</span>).<span class="ident">map</span>(<span class="op">|</span><span class="ident">k</span><span class="op">|</span> (<span class="ident">k</span>, ()))
});
<span class="ident">Set</span>(<span class="ident">root</span>)
}
<span class="doccomment">/// return a new set with k inserted into it. If k already</span>
<span class="doccomment">/// exists in the old set return true, else false. If the</span>
<span class="doccomment">/// element already exists in the set memory will not be</span>
<span class="doccomment">/// allocated.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">insert</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">k</span>: <span class="ident">K</span>) <span class="op">-></span> (<span class="self">Self</span>, <span class="ident">bool</span>) {
<span class="kw">if</span> <span class="self">self</span>.<span class="ident">contains</span>(<span class="kw-2">&</span><span class="ident">k</span>) {
(<span class="self">self</span>.<span class="ident">clone</span>(), <span class="bool-val">true</span>)
} <span class="kw">else</span> {
(<span class="ident">Set</span>(<span class="self">self</span>.<span class="number">0</span>.<span class="ident">insert</span>(<span class="ident">k</span>, ()).<span class="number">0</span>), <span class="bool-val">false</span>)
}
}
<span class="doccomment">/// return true if the set contains k, else false. Runs in</span>
<span class="doccomment">/// log(N) time and constant space. where N is the size of</span>
<span class="doccomment">/// the set.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">contains</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">Q</span><span class="op">></span>(<span class="kw-2">&</span><span class="lifetime">'a</span> <span class="self">self</span>, <span class="ident">k</span>: <span class="kw-2">&</span><span class="ident">Q</span>) <span class="op">-></span> <span class="ident">bool</span>
<span class="kw">where</span>
<span class="ident">Q</span>: <span class="question-mark">?</span><span class="ident">Sized</span> <span class="op">+</span> <span class="ident">Ord</span>,
<span class="ident">K</span>: <span class="ident">Borrow</span><span class="op"><</span><span class="ident">Q</span><span class="op">></span>,
{
<span class="self">self</span>.<span class="number">0</span>.<span class="ident">get</span>(<span class="ident">k</span>).<span class="ident">is_some</span>()
}
<span class="doccomment">/// return a reference to an item in the set if any that is equal to the given value.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">get</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">Q</span><span class="op">></span>(<span class="kw-2">&</span><span class="lifetime">'a</span> <span class="self">self</span>, <span class="ident">k</span>: <span class="kw-2">&</span><span class="ident">Q</span>) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">K</span><span class="op">></span>
<span class="kw">where</span>
<span class="ident">Q</span>: <span class="question-mark">?</span><span class="ident">Sized</span> <span class="op">+</span> <span class="ident">Ord</span>,
<span class="ident">K</span>: <span class="ident">Borrow</span><span class="op"><</span><span class="ident">Q</span><span class="op">></span>,
{
<span class="self">self</span>.<span class="number">0</span>.<span class="ident">get_key</span>(<span class="ident">k</span>)
}
<span class="doccomment">/// return a new set with k removed. Runs in log(N) time</span>
<span class="doccomment">/// and log(N) space, where N is the size of the set</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">remove</span><span class="op"><</span><span class="ident">Q</span>: <span class="ident">Sized</span> <span class="op">+</span> <span class="ident">Ord</span><span class="op">></span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">k</span>: <span class="kw-2">&</span><span class="ident">Q</span>) <span class="op">-></span> (<span class="self">Self</span>, <span class="ident">bool</span>)
<span class="kw">where</span>
<span class="ident">K</span>: <span class="ident">Borrow</span><span class="op"><</span><span class="ident">Q</span><span class="op">></span>,
{
<span class="kw">let</span> (<span class="ident">t</span>, <span class="ident">prev</span>) <span class="op">=</span> <span class="self">self</span>.<span class="number">0</span>.<span class="ident">remove</span>(<span class="ident">k</span>);
(<span class="ident">Set</span>(<span class="ident">t</span>), <span class="ident">prev</span>.<span class="ident">is_some</span>())
}
<span class="doccomment">/// return the union of 2 sets. Runs in O(log(N) + M) time, where</span>
<span class="doccomment">/// N is the largest of the two sets, and M is the number of</span>
<span class="doccomment">/// chunks that intersect, which is roughly proportional to the</span>
<span class="doccomment">/// size of the intersection.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// # Examples</span>
<span class="doccomment">/// ```</span>
<span class="doccomment">/// use std::iter::FromIterator;</span>
<span class="doccomment">/// use self::immutable_chunkmap::set::Set;</span>
<span class="doccomment">///</span>
<span class="doccomment">/// let s0 = Set::from_iter(0..10);</span>
<span class="doccomment">/// let s1 = Set::from_iter(5..15);</span>
<span class="doccomment">/// let s2 = s0.union(&s1);</span>
<span class="doccomment">/// for i in 0..15 {</span>
<span class="doccomment">/// assert!(s2.contains(&i));</span>
<span class="doccomment">/// }</span>
<span class="doccomment">/// ```</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">union</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">other</span>: <span class="kw-2">&</span><span class="ident">Set</span><span class="op"><</span><span class="ident">K</span><span class="op">></span>) <span class="op">-></span> <span class="self">Self</span> {
<span class="ident">Set</span>(<span class="ident">Tree</span>::<span class="ident">merge</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="number">0</span>, <span class="kw-2">&</span><span class="ident">other</span>.<span class="number">0</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="op">|</span><span class="kw">_</span>, (), ()<span class="op">|</span> <span class="prelude-val">Some</span>(())))
}
<span class="doccomment">/// get the number of elements in the map O(1) time and space</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">len</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">usize</span> {
<span class="self">self</span>.<span class="number">0</span>.<span class="ident">len</span>()
}
<span class="doccomment">/// return an iterator over the subset of elements in the</span>
<span class="doccomment">/// set that are within the specified range.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// The returned iterator runs in O(log(N) + M) time, and</span>
<span class="doccomment">/// constant space. N is the number of elements in the</span>
<span class="doccomment">/// tree, and M is the number of elements you examine.</span>
<span class="doccomment">///</span>
<span class="doccomment">/// if lbound >= ubound the returned iterator will be empty</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">range</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">Q</span><span class="op">></span>(<span class="kw-2">&</span><span class="lifetime">'a</span> <span class="self">self</span>, <span class="ident">lbound</span>: <span class="ident">Bound</span><span class="op"><</span><span class="ident">Q</span><span class="op">></span>, <span class="ident">ubound</span>: <span class="ident">Bound</span><span class="op"><</span><span class="ident">Q</span><span class="op">></span>) <span class="op">-></span> <span class="ident">SetIter</span><span class="op"><</span><span class="lifetime">'a</span>, <span class="ident">Q</span>, <span class="ident">K</span><span class="op">></span>
<span class="kw">where</span>
<span class="ident">Q</span>: <span class="ident">Ord</span>,
<span class="ident">K</span>: <span class="lifetime">'a</span> <span class="op">+</span> <span class="ident">Clone</span> <span class="op">+</span> <span class="ident">Ord</span> <span class="op">+</span> <span class="ident">Borrow</span><span class="op"><</span><span class="ident">Q</span><span class="op">></span>,
{
<span class="ident">SetIter</span>(<span class="self">self</span>.<span class="number">0</span>.<span class="ident">range</span>(<span class="ident">lbound</span>, <span class="ident">ubound</span>))
}
}
<span class="kw">impl</span><span class="op"><</span><span class="ident">K</span><span class="op">></span> <span class="ident">Set</span><span class="op"><</span><span class="ident">K</span><span class="op">></span>
<span class="kw">where</span>
<span class="ident">K</span>: <span class="ident">Ord</span> <span class="op">+</span> <span class="ident">Clone</span> <span class="op">+</span> <span class="ident">Debug</span>,
{
<span class="attribute">#[<span class="ident">allow</span>(<span class="ident">dead_code</span>)]</span>
<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn</span> <span class="ident">invariant</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> () {
<span class="self">self</span>.<span class="number">0</span>.<span class="ident">invariant</span>()
}
}
</pre>
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