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</pre><pre class="rust"><code><span class="doccomment">//! An order-preserving immutable map constructed at compile time.
</span><span class="kw">use </span>core::fmt;
<span class="kw">use </span>core::iter::FusedIterator;
<span class="kw">use </span>core::iter::IntoIterator;
<span class="kw">use </span>core::ops::Index;
<span class="kw">use </span>core::slice;
<span class="kw">use </span>phf_shared::{<span class="self">self</span>, HashKey, PhfBorrow, PhfHash};
<span class="doccomment">/// An order-preserving immutable map constructed at compile time.
///
/// Unlike a `Map`, iteration order is guaranteed to match the definition
/// order.
///
/// ## Note
///
/// The fields of this struct are public so that they may be initialized by the
/// `phf_ordered_map!` macro and code generation. They are subject to change at
/// any time and should never be accessed directly.
</span><span class="kw">pub struct </span>OrderedMap<K: <span class="lifetime">'static</span>, V: <span class="lifetime">'static</span>> {
<span class="attr">#[doc(hidden)]
</span><span class="kw">pub </span>key: HashKey,
<span class="attr">#[doc(hidden)]
</span><span class="kw">pub </span>disps: <span class="kw-2">&</span><span class="lifetime">'static </span>[(u32, u32)],
<span class="attr">#[doc(hidden)]
</span><span class="kw">pub </span>idxs: <span class="kw-2">&</span><span class="lifetime">'static </span>[usize],
<span class="attr">#[doc(hidden)]
</span><span class="kw">pub </span>entries: <span class="kw-2">&</span><span class="lifetime">'static </span>[(K, V)],
}
<span class="kw">impl</span><K, V> fmt::Debug <span class="kw">for </span>OrderedMap<K, V>
<span class="kw">where
</span>K: fmt::Debug,
V: fmt::Debug,
{
<span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, fmt: <span class="kw-2">&mut </span>fmt::Formatter<<span class="lifetime">'_</span>>) -> fmt::Result {
fmt.debug_map().entries(<span class="self">self</span>.entries()).finish()
}
}
<span class="kw">impl</span><<span class="lifetime">'a</span>, K, V, T: <span class="question-mark">?</span>Sized> Index<<span class="kw-2">&</span><span class="lifetime">'a </span>T> <span class="kw">for </span>OrderedMap<K, V>
<span class="kw">where
</span>T: Eq + PhfHash,
K: PhfBorrow<T>,
{
<span class="kw">type </span>Output = V;
<span class="kw">fn </span>index(<span class="kw-2">&</span><span class="self">self</span>, k: <span class="kw-2">&</span><span class="lifetime">'a </span>T) -> <span class="kw-2">&</span>V {
<span class="self">self</span>.get(k).expect(<span class="string">"invalid key"</span>)
}
}
<span class="kw">impl</span><K, V> OrderedMap<K, V> {
<span class="doccomment">/// Returns the number of entries in the `OrderedMap`.
</span><span class="attr">#[inline]
</span><span class="kw">pub const fn </span>len(<span class="kw-2">&</span><span class="self">self</span>) -> usize {
<span class="self">self</span>.entries.len()
}
<span class="doccomment">/// Returns true if the `OrderedMap` is empty.
</span><span class="attr">#[inline]
</span><span class="kw">pub const fn </span>is_empty(<span class="kw-2">&</span><span class="self">self</span>) -> bool {
<span class="self">self</span>.len() == <span class="number">0
</span>}
<span class="doccomment">/// Returns a reference to the value that `key` maps to.
</span><span class="kw">pub fn </span>get<T: <span class="question-mark">?</span>Sized>(<span class="kw-2">&</span><span class="self">self</span>, key: <span class="kw-2">&</span>T) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span>V>
<span class="kw">where
</span>T: Eq + PhfHash,
K: PhfBorrow<T>,
{
<span class="self">self</span>.get_entry(key).map(|e| e.<span class="number">1</span>)
}
<span class="doccomment">/// Returns a reference to the map's internal static instance of the given
/// key.
///
/// This can be useful for interning schemes.
</span><span class="kw">pub fn </span>get_key<T: <span class="question-mark">?</span>Sized>(<span class="kw-2">&</span><span class="self">self</span>, key: <span class="kw-2">&</span>T) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span>K>
<span class="kw">where
</span>T: Eq + PhfHash,
K: PhfBorrow<T>,
{
<span class="self">self</span>.get_entry(key).map(|e| e.<span class="number">0</span>)
}
<span class="doccomment">/// Determines if `key` is in the `OrderedMap`.
</span><span class="kw">pub fn </span>contains_key<T: <span class="question-mark">?</span>Sized>(<span class="kw-2">&</span><span class="self">self</span>, key: <span class="kw-2">&</span>T) -> bool
<span class="kw">where
</span>T: Eq + PhfHash,
K: PhfBorrow<T>,
{
<span class="self">self</span>.get(key).is_some()
}
<span class="doccomment">/// Returns the index of the key within the list used to initialize
/// the ordered map.
</span><span class="kw">pub fn </span>get_index<T: <span class="question-mark">?</span>Sized>(<span class="kw-2">&</span><span class="self">self</span>, key: <span class="kw-2">&</span>T) -> <span class="prelude-ty">Option</span><usize>
<span class="kw">where
</span>T: Eq + PhfHash,
K: PhfBorrow<T>,
{
<span class="self">self</span>.get_internal(key).map(|(i, <span class="kw">_</span>)| i)
}
<span class="doccomment">/// Returns references to both the key and values at an index
/// within the list used to initialize the ordered map. See `.get_index(key)`.
</span><span class="kw">pub fn </span>index(<span class="kw-2">&</span><span class="self">self</span>, index: usize) -> <span class="prelude-ty">Option</span><(<span class="kw-2">&</span>K, <span class="kw-2">&</span>V)> {
<span class="self">self</span>.entries.get(index).map(|<span class="kw-2">&</span>(<span class="kw-2">ref </span>k, <span class="kw-2">ref </span>v)| (k, v))
}
<span class="doccomment">/// Like `get`, but returns both the key and the value.
</span><span class="kw">pub fn </span>get_entry<T: <span class="question-mark">?</span>Sized>(<span class="kw-2">&</span><span class="self">self</span>, key: <span class="kw-2">&</span>T) -> <span class="prelude-ty">Option</span><(<span class="kw-2">&</span>K, <span class="kw-2">&</span>V)>
<span class="kw">where
</span>T: Eq + PhfHash,
K: PhfBorrow<T>,
{
<span class="self">self</span>.get_internal(key).map(|(<span class="kw">_</span>, e)| e)
}
<span class="kw">fn </span>get_internal<T: <span class="question-mark">?</span>Sized>(<span class="kw-2">&</span><span class="self">self</span>, key: <span class="kw-2">&</span>T) -> <span class="prelude-ty">Option</span><(usize, (<span class="kw-2">&</span>K, <span class="kw-2">&</span>V))>
<span class="kw">where
</span>T: Eq + PhfHash,
K: PhfBorrow<T>,
{
<span class="kw">if </span><span class="self">self</span>.disps.is_empty() {
<span class="kw">return </span><span class="prelude-val">None</span>;
} <span class="comment">//Prevent panic on empty map
</span><span class="kw">let </span>hashes = phf_shared::hash(key, <span class="kw-2">&</span><span class="self">self</span>.key);
<span class="kw">let </span>idx_index = phf_shared::get_index(<span class="kw-2">&</span>hashes, <span class="self">self</span>.disps, <span class="self">self</span>.idxs.len());
<span class="kw">let </span>idx = <span class="self">self</span>.idxs[idx_index <span class="kw">as </span>usize];
<span class="kw">let </span>entry = <span class="kw-2">&</span><span class="self">self</span>.entries[idx];
<span class="kw">let </span>b: <span class="kw-2">&</span>T = entry.<span class="number">0</span>.borrow();
<span class="kw">if </span>b == key {
<span class="prelude-val">Some</span>((idx, (<span class="kw-2">&</span>entry.<span class="number">0</span>, <span class="kw-2">&</span>entry.<span class="number">1</span>)))
} <span class="kw">else </span>{
<span class="prelude-val">None
</span>}
}
<span class="doccomment">/// Returns an iterator over the key/value pairs in the map.
///
/// Entries are returned in the same order in which they were defined.
</span><span class="kw">pub fn </span>entries(<span class="kw-2">&</span><span class="self">self</span>) -> Entries<<span class="lifetime">'_</span>, K, V> {
Entries {
iter: <span class="self">self</span>.entries.iter(),
}
}
<span class="doccomment">/// Returns an iterator over the keys in the map.
///
/// Keys are returned in the same order in which they were defined.
</span><span class="kw">pub fn </span>keys(<span class="kw-2">&</span><span class="self">self</span>) -> Keys<<span class="lifetime">'_</span>, K, V> {
Keys {
iter: <span class="self">self</span>.entries(),
}
}
<span class="doccomment">/// Returns an iterator over the values in the map.
///
/// Values are returned in the same order in which they were defined.
</span><span class="kw">pub fn </span>values(<span class="kw-2">&</span><span class="self">self</span>) -> Values<<span class="lifetime">'_</span>, K, V> {
Values {
iter: <span class="self">self</span>.entries(),
}
}
}
<span class="kw">impl</span><<span class="lifetime">'a</span>, K, V> IntoIterator <span class="kw">for </span><span class="kw-2">&</span><span class="lifetime">'a </span>OrderedMap<K, V> {
<span class="kw">type </span>Item = (<span class="kw-2">&</span><span class="lifetime">'a </span>K, <span class="kw-2">&</span><span class="lifetime">'a </span>V);
<span class="kw">type </span>IntoIter = Entries<<span class="lifetime">'a</span>, K, V>;
<span class="kw">fn </span>into_iter(<span class="self">self</span>) -> Entries<<span class="lifetime">'a</span>, K, V> {
<span class="self">self</span>.entries()
}
}
<span class="doccomment">/// An iterator over the entries in a `OrderedMap`.
</span><span class="kw">pub struct </span>Entries<<span class="lifetime">'a</span>, K, V> {
iter: slice::Iter<<span class="lifetime">'a</span>, (K, V)>,
}
<span class="kw">impl</span><<span class="lifetime">'a</span>, K, V> Clone <span class="kw">for </span>Entries<<span class="lifetime">'a</span>, K, V> {
<span class="attr">#[inline]
</span><span class="kw">fn </span>clone(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="self">Self </span>{
<span class="self">Self </span>{
iter: <span class="self">self</span>.iter.clone(),
}
}
}
<span class="kw">impl</span><<span class="lifetime">'a</span>, K, V> fmt::Debug <span class="kw">for </span>Entries<<span class="lifetime">'a</span>, K, V>
<span class="kw">where
</span>K: fmt::Debug,
V: fmt::Debug,
{
<span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter) -> fmt::Result {
f.debug_list().entries(<span class="self">self</span>.clone()).finish()
}
}
<span class="kw">impl</span><<span class="lifetime">'a</span>, K, V> Iterator <span class="kw">for </span>Entries<<span class="lifetime">'a</span>, K, V> {
<span class="kw">type </span>Item = (<span class="kw-2">&</span><span class="lifetime">'a </span>K, <span class="kw-2">&</span><span class="lifetime">'a </span>V);
<span class="kw">fn </span>next(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><(<span class="kw-2">&</span><span class="lifetime">'a </span>K, <span class="kw-2">&</span><span class="lifetime">'a </span>V)> {
<span class="self">self</span>.iter.next().map(|e| (<span class="kw-2">&</span>e.<span class="number">0</span>, <span class="kw-2">&</span>e.<span class="number">1</span>))
}
<span class="kw">fn </span>size_hint(<span class="kw-2">&</span><span class="self">self</span>) -> (usize, <span class="prelude-ty">Option</span><usize>) {
<span class="self">self</span>.iter.size_hint()
}
}
<span class="kw">impl</span><<span class="lifetime">'a</span>, K, V> DoubleEndedIterator <span class="kw">for </span>Entries<<span class="lifetime">'a</span>, K, V> {
<span class="kw">fn </span>next_back(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><(<span class="kw-2">&</span><span class="lifetime">'a </span>K, <span class="kw-2">&</span><span class="lifetime">'a </span>V)> {
<span class="self">self</span>.iter.next_back().map(|e| (<span class="kw-2">&</span>e.<span class="number">0</span>, <span class="kw-2">&</span>e.<span class="number">1</span>))
}
}
<span class="kw">impl</span><<span class="lifetime">'a</span>, K, V> ExactSizeIterator <span class="kw">for </span>Entries<<span class="lifetime">'a</span>, K, V> {}
<span class="kw">impl</span><<span class="lifetime">'a</span>, K, V> FusedIterator <span class="kw">for </span>Entries<<span class="lifetime">'a</span>, K, V> {}
<span class="doccomment">/// An iterator over the keys in a `OrderedMap`.
</span><span class="kw">pub struct </span>Keys<<span class="lifetime">'a</span>, K, V> {
iter: Entries<<span class="lifetime">'a</span>, K, V>,
}
<span class="kw">impl</span><<span class="lifetime">'a</span>, K, V> Clone <span class="kw">for </span>Keys<<span class="lifetime">'a</span>, K, V> {
<span class="attr">#[inline]
</span><span class="kw">fn </span>clone(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="self">Self </span>{
<span class="self">Self </span>{
iter: <span class="self">self</span>.iter.clone(),
}
}
}
<span class="kw">impl</span><<span class="lifetime">'a</span>, K, V> fmt::Debug <span class="kw">for </span>Keys<<span class="lifetime">'a</span>, K, V>
<span class="kw">where
</span>K: fmt::Debug,
{
<span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter) -> fmt::Result {
f.debug_list().entries(<span class="self">self</span>.clone()).finish()
}
}
<span class="kw">impl</span><<span class="lifetime">'a</span>, K, V> Iterator <span class="kw">for </span>Keys<<span class="lifetime">'a</span>, K, V> {
<span class="kw">type </span>Item = <span class="kw-2">&</span><span class="lifetime">'a </span>K;
<span class="kw">fn </span>next(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span><span class="lifetime">'a </span>K> {
<span class="self">self</span>.iter.next().map(|e| e.<span class="number">0</span>)
}
<span class="kw">fn </span>size_hint(<span class="kw-2">&</span><span class="self">self</span>) -> (usize, <span class="prelude-ty">Option</span><usize>) {
<span class="self">self</span>.iter.size_hint()
}
}
<span class="kw">impl</span><<span class="lifetime">'a</span>, K, V> DoubleEndedIterator <span class="kw">for </span>Keys<<span class="lifetime">'a</span>, K, V> {
<span class="kw">fn </span>next_back(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span><span class="lifetime">'a </span>K> {
<span class="self">self</span>.iter.next_back().map(|e| e.<span class="number">0</span>)
}
}
<span class="kw">impl</span><<span class="lifetime">'a</span>, K, V> ExactSizeIterator <span class="kw">for </span>Keys<<span class="lifetime">'a</span>, K, V> {}
<span class="kw">impl</span><<span class="lifetime">'a</span>, K, V> FusedIterator <span class="kw">for </span>Keys<<span class="lifetime">'a</span>, K, V> {}
<span class="doccomment">/// An iterator over the values in a `OrderedMap`.
</span><span class="kw">pub struct </span>Values<<span class="lifetime">'a</span>, K, V> {
iter: Entries<<span class="lifetime">'a</span>, K, V>,
}
<span class="kw">impl</span><<span class="lifetime">'a</span>, K, V> Clone <span class="kw">for </span>Values<<span class="lifetime">'a</span>, K, V> {
<span class="attr">#[inline]
</span><span class="kw">fn </span>clone(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="self">Self </span>{
<span class="self">Self </span>{
iter: <span class="self">self</span>.iter.clone(),
}
}
}
<span class="kw">impl</span><<span class="lifetime">'a</span>, K, V> fmt::Debug <span class="kw">for </span>Values<<span class="lifetime">'a</span>, K, V>
<span class="kw">where
</span>V: fmt::Debug,
{
<span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter) -> fmt::Result {
f.debug_list().entries(<span class="self">self</span>.clone()).finish()
}
}
<span class="kw">impl</span><<span class="lifetime">'a</span>, K, V> Iterator <span class="kw">for </span>Values<<span class="lifetime">'a</span>, K, V> {
<span class="kw">type </span>Item = <span class="kw-2">&</span><span class="lifetime">'a </span>V;
<span class="kw">fn </span>next(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span><span class="lifetime">'a </span>V> {
<span class="self">self</span>.iter.next().map(|e| e.<span class="number">1</span>)
}
<span class="kw">fn </span>size_hint(<span class="kw-2">&</span><span class="self">self</span>) -> (usize, <span class="prelude-ty">Option</span><usize>) {
<span class="self">self</span>.iter.size_hint()
}
}
<span class="kw">impl</span><<span class="lifetime">'a</span>, K, V> DoubleEndedIterator <span class="kw">for </span>Values<<span class="lifetime">'a</span>, K, V> {
<span class="kw">fn </span>next_back(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span><span class="lifetime">'a </span>V> {
<span class="self">self</span>.iter.next_back().map(|e| e.<span class="number">1</span>)
}
}
<span class="kw">impl</span><<span class="lifetime">'a</span>, K, V> ExactSizeIterator <span class="kw">for </span>Values<<span class="lifetime">'a</span>, K, V> {}
<span class="kw">impl</span><<span class="lifetime">'a</span>, K, V> FusedIterator <span class="kw">for </span>Values<<span class="lifetime">'a</span>, K, V> {}
</code></pre></div>
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