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 </pre><pre class="rust"><code><span class="kw">use </span>std::fmt::Debug;
 <span class="kw">use </span>std::ops::Range;

 <span class="kw">use </span>fastfield_codecs::MonotonicallyMappableToU64;
 <span class="kw">use </span>rustc_hash::FxHashMap;
 <span class="kw">use </span>serde::{Deserialize, Serialize};

 <span class="kw">use </span><span class="kw">crate</span>::aggregation::agg_req_with_accessor::{
     AggregationsWithAccessor, BucketAggregationWithAccessor,
 };
 <span class="kw">use </span><span class="kw">crate</span>::aggregation::intermediate_agg_result::{
     IntermediateBucketResult, IntermediateRangeBucketEntry, IntermediateRangeBucketResult,
 };
 <span class="kw">use </span><span class="kw">crate</span>::aggregation::segment_agg_result::{BucketCount, SegmentAggregationResultsCollector};
 <span class="kw">use </span><span class="kw">crate</span>::aggregation::{
     f64_from_fastfield_u64, f64_to_fastfield_u64, format_date, Key, SerializedKey,
 };
 <span class="kw">use </span><span class="kw">crate</span>::schema::Type;
 <span class="kw">use crate</span>::{DocId, TantivyError};

 <span class="doccomment">/// Provide user-defined buckets to aggregate on.
 /// Two special buckets will automatically be created to cover the whole range of values.
 /// The provided buckets have to be continuous.
 /// During the aggregation, the values extracted from the fast_field `field` will be checked
 /// against each bucket range. Note that this aggregation includes the from value and excludes the
 /// to value for each range.
 ///
 /// Result type is [`BucketResult`](crate::aggregation::agg_result::BucketResult) with
 /// [`RangeBucketEntry`](crate::aggregation::agg_result::RangeBucketEntry) on the
 /// `AggregationCollector`.
 ///
 /// Result type is
 /// [`IntermediateBucketResult`](crate::aggregation::intermediate_agg_result::IntermediateBucketResult) with
 /// [`IntermediateRangeBucketEntry`](crate::aggregation::intermediate_agg_result::IntermediateRangeBucketEntry) on the
 /// `DistributedAggregationCollector`.
 ///
 /// # Limitations/Compatibility
 /// Overlapping ranges are not yet supported.
 ///
 /// # Request JSON Format
 /// ```json
 /// {
 ///     &quot;my_ranges&quot;: {
 ///         &quot;field&quot;: &quot;score&quot;,
 ///         &quot;ranges&quot;: [
 ///             { &quot;to&quot;: 3.0 },
 ///             { &quot;from&quot;: 3.0, &quot;to&quot;: 7.0 },
 ///             { &quot;from&quot;: 7.0, &quot;to&quot;: 20.0 },
 ///             { &quot;from&quot;: 20.0 }
 ///         ]
 ///     }
 /// }
 /// ```
 </span><span class="attribute">#[derive(Clone, Debug, Default, PartialEq, Serialize, Deserialize)]
 </span><span class="kw">pub struct </span>RangeAggregation {
     <span class="doccomment">/// The field to aggregate on.
     </span><span class="kw">pub </span>field: String,
     <span class="doccomment">/// Note that this aggregation includes the from value and excludes the to value for each
     /// range. Extra buckets will be created until the first to, and last from, if necessary.
     </span><span class="kw">pub </span>ranges: Vec&lt;RangeAggregationRange&gt;,
     <span class="doccomment">/// Whether to return the buckets as a hash map
     </span><span class="attribute">#[serde(default)]
     </span><span class="kw">pub </span>keyed: bool,
 }

 <span class="attribute">#[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 </span><span class="doccomment">/// The range for one range bucket.
 </span><span class="kw">pub struct </span>RangeAggregationRange {
     <span class="doccomment">/// Custom key for the range bucket
     </span><span class="attribute">#[serde(skip_serializing_if = <span class="string">&quot;Option::is_none&quot;</span>, default)]
     </span><span class="kw">pub </span>key: <span class="prelude-ty">Option</span>&lt;String&gt;,
     <span class="doccomment">/// The from range value, which is inclusive in the range.
     /// `None` equals to an open ended interval.
     </span><span class="attribute">#[serde(skip_serializing_if = <span class="string">&quot;Option::is_none&quot;</span>, default)]
     </span><span class="kw">pub </span>from: <span class="prelude-ty">Option</span>&lt;f64&gt;,
     <span class="doccomment">/// The to range value, which is not inclusive in the range.
     /// `None` equals to an open ended interval.
     </span><span class="attribute">#[serde(skip_serializing_if = <span class="string">&quot;Option::is_none&quot;</span>, default)]
     </span><span class="kw">pub </span>to: <span class="prelude-ty">Option</span>&lt;f64&gt;,
 }

 <span class="kw">impl </span>From&lt;Range&lt;f64&gt;&gt; <span class="kw">for </span>RangeAggregationRange {
     <span class="kw">fn </span>from(range: Range&lt;f64&gt;) -&gt; <span class="self">Self </span>{
         <span class="kw">let </span>from = <span class="kw">if </span>range.start == f64::MIN {
             <span class="prelude-val">None
         </span>} <span class="kw">else </span>{
             <span class="prelude-val">Some</span>(range.start)
         };
         <span class="kw">let </span>to = <span class="kw">if </span>range.end == f64::MAX {
             <span class="prelude-val">None
         </span>} <span class="kw">else </span>{
             <span class="prelude-val">Some</span>(range.end)
         };
         RangeAggregationRange {
             key: <span class="prelude-val">None</span>,
             from,
             to,
         }
     }
 }

 <span class="attribute">#[derive(Clone, Debug, PartialEq)]
 </span><span class="doccomment">/// Internally used u64 range for one range bucket.
 </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct </span>InternalRangeAggregationRange {
     <span class="doccomment">/// Custom key for the range bucket
     </span>key: <span class="prelude-ty">Option</span>&lt;String&gt;,
     <span class="doccomment">/// `u64` range value
     </span>range: Range&lt;u64&gt;,
 }

 <span class="kw">impl </span>From&lt;Range&lt;u64&gt;&gt; <span class="kw">for </span>InternalRangeAggregationRange {
     <span class="kw">fn </span>from(range: Range&lt;u64&gt;) -&gt; <span class="self">Self </span>{
         InternalRangeAggregationRange { key: <span class="prelude-val">None</span>, range }
     }
 }

 <span class="attribute">#[derive(Clone, Debug, PartialEq)]
 </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct </span>SegmentRangeAndBucketEntry {
     range: Range&lt;u64&gt;,
     bucket: SegmentRangeBucketEntry,
 }

 <span class="doccomment">/// The collector puts values from the fast field into the correct buckets and does a conversion to
 /// the correct datatype.
 </span><span class="attribute">#[derive(Clone, Debug, PartialEq)]
 </span><span class="kw">pub struct </span>SegmentRangeCollector {
     <span class="doccomment">/// The buckets containing the aggregation data.
     </span>buckets: Vec&lt;SegmentRangeAndBucketEntry&gt;,
     field_type: Type,
 }

 <span class="attribute">#[derive(Clone, PartialEq)]
 </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct </span>SegmentRangeBucketEntry {
     <span class="kw">pub </span>key: Key,
     <span class="kw">pub </span>doc_count: u64,
     <span class="kw">pub </span>sub_aggregation: <span class="prelude-ty">Option</span>&lt;SegmentAggregationResultsCollector&gt;,
     <span class="doccomment">/// The from range of the bucket. Equals `f64::MIN` when `None`.
     </span><span class="kw">pub </span>from: <span class="prelude-ty">Option</span>&lt;f64&gt;,
     <span class="doccomment">/// The to range of the bucket. Equals `f64::MAX` when `None`. Open interval, `to` is not
     /// inclusive.
     </span><span class="kw">pub </span>to: <span class="prelude-ty">Option</span>&lt;f64&gt;,
 }

 <span class="kw">impl </span>Debug <span class="kw">for </span>SegmentRangeBucketEntry {
     <span class="kw">fn </span>fmt(<span class="kw-2">&amp;</span><span class="self">self</span>, f: <span class="kw-2">&amp;mut </span>std::fmt::Formatter&lt;<span class="lifetime">&#39;_</span>&gt;) -&gt; std::fmt::Result {
         f.debug_struct(<span class="string">&quot;SegmentRangeBucketEntry&quot;</span>)
             .field(<span class="string">&quot;key&quot;</span>, <span class="kw-2">&amp;</span><span class="self">self</span>.key)
             .field(<span class="string">&quot;doc_count&quot;</span>, <span class="kw-2">&amp;</span><span class="self">self</span>.doc_count)
             .field(<span class="string">&quot;from&quot;</span>, <span class="kw-2">&amp;</span><span class="self">self</span>.from)
             .field(<span class="string">&quot;to&quot;</span>, <span class="kw-2">&amp;</span><span class="self">self</span>.to)
             .finish()
     }
 }
 <span class="kw">impl </span>SegmentRangeBucketEntry {
     <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>into_intermediate_bucket_entry(
         <span class="self">self</span>,
         agg_with_accessor: <span class="kw-2">&amp;</span>AggregationsWithAccessor,
     ) -&gt; <span class="kw">crate</span>::Result&lt;IntermediateRangeBucketEntry&gt; {
         <span class="kw">let </span>sub_aggregation = <span class="kw">if let </span><span class="prelude-val">Some</span>(sub_aggregation) = <span class="self">self</span>.sub_aggregation {
             sub_aggregation.into_intermediate_aggregations_result(agg_with_accessor)<span class="question-mark">?
         </span>} <span class="kw">else </span>{
             Default::default()
         };

         <span class="prelude-val">Ok</span>(IntermediateRangeBucketEntry {
             key: <span class="self">self</span>.key,
             doc_count: <span class="self">self</span>.doc_count,
             sub_aggregation,
             from: <span class="self">self</span>.from,
             to: <span class="self">self</span>.to,
         })
     }
 }

 <span class="kw">impl </span>SegmentRangeCollector {
     <span class="kw">pub fn </span>into_intermediate_bucket_result(
         <span class="self">self</span>,
         agg_with_accessor: <span class="kw-2">&amp;</span>BucketAggregationWithAccessor,
     ) -&gt; <span class="kw">crate</span>::Result&lt;IntermediateBucketResult&gt; {
         <span class="kw">let </span>field_type = <span class="self">self</span>.field_type;

         <span class="kw">let </span>buckets: FxHashMap&lt;SerializedKey, IntermediateRangeBucketEntry&gt; = <span class="self">self
             </span>.buckets
             .into_iter()
             .map(<span class="kw">move </span>|range_bucket| {
                 <span class="prelude-val">Ok</span>((
                     range_to_string(<span class="kw-2">&amp;</span>range_bucket.range, <span class="kw-2">&amp;</span>field_type)<span class="question-mark">?</span>,
                     range_bucket
                         .bucket
                         .into_intermediate_bucket_entry(<span class="kw-2">&amp;</span>agg_with_accessor.sub_aggregation)<span class="question-mark">?</span>,
                 ))
             })
             .collect::&lt;<span class="kw">crate</span>::Result&lt;<span class="kw">_</span>&gt;&gt;()<span class="question-mark">?</span>;

         <span class="prelude-val">Ok</span>(IntermediateBucketResult::Range(
             IntermediateRangeBucketResult { buckets },
         ))
     }

     <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>from_req_and_validate(
         req: <span class="kw-2">&amp;</span>RangeAggregation,
         sub_aggregation: <span class="kw-2">&amp;</span>AggregationsWithAccessor,
         bucket_count: <span class="kw-2">&amp;</span>BucketCount,
         field_type: Type,
     ) -&gt; <span class="kw">crate</span>::Result&lt;<span class="self">Self</span>&gt; {
         <span class="comment">// The range input on the request is f64.
         // We need to convert to u64 ranges, because we read the values as u64.
         // The mapping from the conversion is monotonic so ordering is preserved.
         </span><span class="kw">let </span>buckets: Vec&lt;<span class="kw">_</span>&gt; = extend_validate_ranges(<span class="kw-2">&amp;</span>req.ranges, <span class="kw-2">&amp;</span>field_type)<span class="question-mark">?
             </span>.iter()
             .map(|range| {
                 <span class="kw">let </span>key = range
                     .key
                     .clone()
                     .map(|key| <span class="prelude-val">Ok</span>(Key::Str(key)))
                     .unwrap_or_else(|| range_to_key(<span class="kw-2">&amp;</span>range.range, <span class="kw-2">&amp;</span>field_type))<span class="question-mark">?</span>;
                 <span class="kw">let </span>to = <span class="kw">if </span>range.range.end == u64::MAX {
                     <span class="prelude-val">None
                 </span>} <span class="kw">else </span>{
                     <span class="prelude-val">Some</span>(f64_from_fastfield_u64(range.range.end, <span class="kw-2">&amp;</span>field_type))
                 };
                 <span class="kw">let </span>from = <span class="kw">if </span>range.range.start == u64::MIN {
                     <span class="prelude-val">None
                 </span>} <span class="kw">else </span>{
                     <span class="prelude-val">Some</span>(f64_from_fastfield_u64(range.range.start, <span class="kw-2">&amp;</span>field_type))
                 };
                 <span class="kw">let </span>sub_aggregation = <span class="kw">if </span>sub_aggregation.is_empty() {
                     <span class="prelude-val">None
                 </span>} <span class="kw">else </span>{
                     <span class="prelude-val">Some</span>(SegmentAggregationResultsCollector::from_req_and_validate(
                         sub_aggregation,
                     )<span class="question-mark">?</span>)
                 };

                 <span class="prelude-val">Ok</span>(SegmentRangeAndBucketEntry {
                     range: range.range.clone(),
                     bucket: SegmentRangeBucketEntry {
                         doc_count: <span class="number">0</span>,
                         sub_aggregation,
                         key,
                         from,
                         to,
                     },
                 })
             })
             .collect::&lt;<span class="kw">crate</span>::Result&lt;<span class="kw">_</span>&gt;&gt;()<span class="question-mark">?</span>;

         bucket_count.add_count(buckets.len() <span class="kw">as </span>u32);
         bucket_count.validate_bucket_count()<span class="question-mark">?</span>;

         <span class="prelude-val">Ok</span>(SegmentRangeCollector {
             buckets,
             field_type,
         })
     }

     <span class="attribute">#[inline]
     </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>collect_block(
         <span class="kw-2">&amp;mut </span><span class="self">self</span>,
         doc: <span class="kw-2">&amp;</span>[DocId],
         bucket_with_accessor: <span class="kw-2">&amp;</span>BucketAggregationWithAccessor,
         force_flush: bool,
     ) -&gt; <span class="kw">crate</span>::Result&lt;()&gt; {
         <span class="kw">let </span><span class="kw-2">mut </span>iter = doc.chunks_exact(<span class="number">4</span>);
         <span class="kw">let </span>accessor = bucket_with_accessor
             .accessor
             .as_single()
             .expect(<span class="string">&quot;unexpected fast field cardinality&quot;</span>);
         <span class="kw">for </span>docs <span class="kw">in </span>iter.by_ref() {
             <span class="kw">let </span>val1 = accessor.get_val(docs[<span class="number">0</span>]);
             <span class="kw">let </span>val2 = accessor.get_val(docs[<span class="number">1</span>]);
             <span class="kw">let </span>val3 = accessor.get_val(docs[<span class="number">2</span>]);
             <span class="kw">let </span>val4 = accessor.get_val(docs[<span class="number">3</span>]);
             <span class="kw">let </span>bucket_pos1 = <span class="self">self</span>.get_bucket_pos(val1);
             <span class="kw">let </span>bucket_pos2 = <span class="self">self</span>.get_bucket_pos(val2);
             <span class="kw">let </span>bucket_pos3 = <span class="self">self</span>.get_bucket_pos(val3);
             <span class="kw">let </span>bucket_pos4 = <span class="self">self</span>.get_bucket_pos(val4);

             <span class="self">self</span>.increment_bucket(bucket_pos1, docs[<span class="number">0</span>], <span class="kw-2">&amp;</span>bucket_with_accessor.sub_aggregation)<span class="question-mark">?</span>;
             <span class="self">self</span>.increment_bucket(bucket_pos2, docs[<span class="number">1</span>], <span class="kw-2">&amp;</span>bucket_with_accessor.sub_aggregation)<span class="question-mark">?</span>;
             <span class="self">self</span>.increment_bucket(bucket_pos3, docs[<span class="number">2</span>], <span class="kw-2">&amp;</span>bucket_with_accessor.sub_aggregation)<span class="question-mark">?</span>;
             <span class="self">self</span>.increment_bucket(bucket_pos4, docs[<span class="number">3</span>], <span class="kw-2">&amp;</span>bucket_with_accessor.sub_aggregation)<span class="question-mark">?</span>;
         }
         <span class="kw">for </span><span class="kw-2">&amp;</span>doc <span class="kw">in </span>iter.remainder() {
             <span class="kw">let </span>val = accessor.get_val(doc);
             <span class="kw">let </span>bucket_pos = <span class="self">self</span>.get_bucket_pos(val);
             <span class="self">self</span>.increment_bucket(bucket_pos, doc, <span class="kw-2">&amp;</span>bucket_with_accessor.sub_aggregation)<span class="question-mark">?</span>;
         }
         <span class="kw">if </span>force_flush {
             <span class="kw">for </span>bucket <span class="kw">in </span><span class="kw-2">&amp;mut </span><span class="self">self</span>.buckets {
                 <span class="kw">if let </span><span class="prelude-val">Some</span>(sub_aggregation) = <span class="kw-2">&amp;mut </span>bucket.bucket.sub_aggregation {
                     sub_aggregation
                         .flush_staged_docs(<span class="kw-2">&amp;</span>bucket_with_accessor.sub_aggregation, force_flush)<span class="question-mark">?</span>;
                 }
             }
         }
         <span class="prelude-val">Ok</span>(())
     }

     <span class="attribute">#[inline]
     </span><span class="kw">fn </span>increment_bucket(
         <span class="kw-2">&amp;mut </span><span class="self">self</span>,
         bucket_pos: usize,
         doc: DocId,
         bucket_with_accessor: <span class="kw-2">&amp;</span>AggregationsWithAccessor,
     ) -&gt; <span class="kw">crate</span>::Result&lt;()&gt; {
         <span class="kw">let </span>bucket = <span class="kw-2">&amp;mut </span><span class="self">self</span>.buckets[bucket_pos];

         bucket.bucket.doc_count += <span class="number">1</span>;
         <span class="kw">if let </span><span class="prelude-val">Some</span>(sub_aggregation) = <span class="kw-2">&amp;mut </span>bucket.bucket.sub_aggregation {
             sub_aggregation.collect(doc, bucket_with_accessor)<span class="question-mark">?</span>;
         }
         <span class="prelude-val">Ok</span>(())
     }

     <span class="attribute">#[inline]
     </span><span class="kw">fn </span>get_bucket_pos(<span class="kw-2">&amp;</span><span class="self">self</span>, val: u64) -&gt; usize {
         <span class="kw">let </span>pos = <span class="self">self
             </span>.buckets
             .binary_search_by_key(<span class="kw-2">&amp;</span>val, |probe| probe.range.start)
             .unwrap_or_else(|pos| pos - <span class="number">1</span>);
         <span class="macro">debug_assert!</span>(<span class="self">self</span>.buckets[pos].range.contains(<span class="kw-2">&amp;</span>val));
         pos
     }
 }

 <span class="doccomment">/// Converts the user provided f64 range value to fast field value space.
 ///
 /// Internally fast field values are always stored as u64.
 /// If the fast field has u64 `[1, 2, 5]`, these values are stored as is in the fast field.
 /// A fast field with f64 `[1.0, 2.0, 5.0]` is converted to u64 space, using a
 /// monotonic mapping function, so the order is preserved.
 ///
 /// Consequently, a f64 user range 1.0..3.0 needs to be converted to fast field value space using
 /// the same monotonic mapping function, so that the provided ranges contain the u64 values in the
 /// fast field.
 /// The alternative would be that every value read would be converted to the f64 range, but that is
 /// more computational expensive when many documents are hit.
 </span><span class="kw">fn </span>to_u64_range(
     range: <span class="kw-2">&amp;</span>RangeAggregationRange,
     field_type: <span class="kw-2">&amp;</span>Type,
 ) -&gt; <span class="kw">crate</span>::Result&lt;InternalRangeAggregationRange&gt; {
     <span class="kw">let </span>start = <span class="kw">if let </span><span class="prelude-val">Some</span>(from) = range.from {
         f64_to_fastfield_u64(from, field_type)
             .ok_or_else(|| TantivyError::InvalidArgument(<span class="string">&quot;invalid field type&quot;</span>.to_string()))<span class="question-mark">?
     </span>} <span class="kw">else </span>{
         u64::MIN
     };

     <span class="kw">let </span>end = <span class="kw">if let </span><span class="prelude-val">Some</span>(to) = range.to {
         f64_to_fastfield_u64(to, field_type)
             .ok_or_else(|| TantivyError::InvalidArgument(<span class="string">&quot;invalid field type&quot;</span>.to_string()))<span class="question-mark">?
     </span>} <span class="kw">else </span>{
         u64::MAX
     };

     <span class="prelude-val">Ok</span>(InternalRangeAggregationRange {
         key: range.key.clone(),
         range: start..end,
     })
 }

 <span class="doccomment">/// Extends the provided buckets to contain the whole value range, by inserting buckets at the
 /// beginning and end and filling gaps.
 </span><span class="kw">fn </span>extend_validate_ranges(
     buckets: <span class="kw-2">&amp;</span>[RangeAggregationRange],
     field_type: <span class="kw-2">&amp;</span>Type,
 ) -&gt; <span class="kw">crate</span>::Result&lt;Vec&lt;InternalRangeAggregationRange&gt;&gt; {
     <span class="kw">let </span><span class="kw-2">mut </span>converted_buckets = buckets
         .iter()
         .map(|range| to_u64_range(range, field_type))
         .collect::&lt;<span class="kw">crate</span>::Result&lt;Vec&lt;<span class="kw">_</span>&gt;&gt;&gt;()<span class="question-mark">?</span>;

     converted_buckets.sort_by_key(|bucket| bucket.range.start);
     <span class="kw">if </span>converted_buckets[<span class="number">0</span>].range.start != u64::MIN {
         converted_buckets.insert(<span class="number">0</span>, (u64::MIN..converted_buckets[<span class="number">0</span>].range.start).into());
     }

     <span class="kw">if </span>converted_buckets[converted_buckets.len() - <span class="number">1</span>].range.end != u64::MAX {
         converted_buckets
             .push((converted_buckets[converted_buckets.len() - <span class="number">1</span>].range.end..u64::MAX).into());
     }

     <span class="comment">// fill up holes in the ranges
     </span><span class="kw">let </span>find_hole = |converted_buckets: <span class="kw-2">&amp;</span>[InternalRangeAggregationRange]| {
         <span class="kw">for </span>(pos, ranges) <span class="kw">in </span>converted_buckets.windows(<span class="number">2</span>).enumerate() {
             <span class="kw">if </span>ranges[<span class="number">0</span>].range.end &gt; ranges[<span class="number">1</span>].range.start {
                 <span class="kw">return </span><span class="prelude-val">Err</span>(TantivyError::InvalidArgument(<span class="macro">format!</span>(
                     <span class="string">&quot;Overlapping ranges not supported range {:?}, range+1 {:?}&quot;</span>,
                     ranges[<span class="number">0</span>], ranges[<span class="number">1</span>]
                 )));
             }
             <span class="kw">if </span>ranges[<span class="number">0</span>].range.end != ranges[<span class="number">1</span>].range.start {
                 <span class="kw">return </span><span class="prelude-val">Ok</span>(<span class="prelude-val">Some</span>(pos));
             }
         }
         <span class="prelude-val">Ok</span>(<span class="prelude-val">None</span>)
     };

     <span class="kw">while let </span><span class="prelude-val">Some</span>(hole_pos) = find_hole(<span class="kw-2">&amp;</span>converted_buckets)<span class="question-mark">? </span>{
         <span class="kw">let </span>new_range =
             converted_buckets[hole_pos].range.end..converted_buckets[hole_pos + <span class="number">1</span>].range.start;
         converted_buckets.insert(hole_pos + <span class="number">1</span>, new_range.into());
     }

     <span class="prelude-val">Ok</span>(converted_buckets)
 }

 <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>range_to_string(range: <span class="kw-2">&amp;</span>Range&lt;u64&gt;, field_type: <span class="kw-2">&amp;</span>Type) -&gt; <span class="kw">crate</span>::Result&lt;String&gt; {
     <span class="comment">// is_start is there for malformed requests, e.g. ig the user passes the range u64::MIN..0.0,
     // it should be rendered as &quot;*-0&quot; and not &quot;*-*&quot;
     </span><span class="kw">let </span>to_str = |val: u64, is_start: bool| {
         <span class="kw">if </span>(is_start &amp;&amp; val == u64::MIN) || (!is_start &amp;&amp; val == u64::MAX) {
             <span class="prelude-val">Ok</span>(<span class="string">&quot;*&quot;</span>.to_string())
         } <span class="kw">else if </span><span class="kw-2">*</span>field_type == Type::Date {
             <span class="kw">let </span>val = i64::from_u64(val);
             format_date(val)
         } <span class="kw">else </span>{
             <span class="prelude-val">Ok</span>(f64_from_fastfield_u64(val, field_type).to_string())
         }
     };

     <span class="prelude-val">Ok</span>(<span class="macro">format!</span>(
         <span class="string">&quot;{}-{}&quot;</span>,
         to_str(range.start, <span class="bool-val">true</span>)<span class="question-mark">?</span>,
         to_str(range.end, <span class="bool-val">false</span>)<span class="question-mark">?
     </span>))
 }

 <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>range_to_key(range: <span class="kw-2">&amp;</span>Range&lt;u64&gt;, field_type: <span class="kw-2">&amp;</span>Type) -&gt; <span class="kw">crate</span>::Result&lt;Key&gt; {
     <span class="prelude-val">Ok</span>(Key::Str(range_to_string(range, field_type)<span class="question-mark">?</span>))
 }

 <span class="attribute">#[cfg(test)]
 </span><span class="kw">mod </span>tests {

     <span class="kw">use </span>fastfield_codecs::MonotonicallyMappableToU64;
     <span class="kw">use </span>serde_json::Value;

     <span class="kw">use super</span>::<span class="kw-2">*</span>;
     <span class="kw">use </span><span class="kw">crate</span>::aggregation::agg_req::{
         Aggregation, Aggregations, BucketAggregation, BucketAggregationType,
     };
     <span class="kw">use </span><span class="kw">crate</span>::aggregation::tests::{
         exec_request, exec_request_with_query, get_test_index_2_segments,
         get_test_index_with_num_docs,
     };

     <span class="kw">pub fn </span>get_collector_from_ranges(
         ranges: Vec&lt;RangeAggregationRange&gt;,
         field_type: Type,
     ) -&gt; SegmentRangeCollector {
         <span class="kw">let </span>req = RangeAggregation {
             field: <span class="string">&quot;dummy&quot;</span>.to_string(),
             ranges,
             ..Default::default()
         };

         SegmentRangeCollector::from_req_and_validate(
             <span class="kw-2">&amp;</span>req,
             <span class="kw-2">&amp;</span>Default::default(),
             <span class="kw-2">&amp;</span>Default::default(),
             field_type,
         )
         .expect(<span class="string">&quot;unexpected error&quot;</span>)
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>range_fraction_test() -&gt; <span class="kw">crate</span>::Result&lt;()&gt; {
         <span class="kw">let </span>index = get_test_index_with_num_docs(<span class="bool-val">false</span>, <span class="number">100</span>)<span class="question-mark">?</span>;

         <span class="kw">let </span>agg_req: Aggregations = <span class="macro">vec!</span>[(
             <span class="string">&quot;range&quot;</span>.to_string(),
             Aggregation::Bucket(BucketAggregation {
                 bucket_agg: BucketAggregationType::Range(RangeAggregation {
                     field: <span class="string">&quot;fraction_f64&quot;</span>.to_string(),
                     ranges: <span class="macro">vec!</span>[(<span class="number">0f64</span>..<span class="number">0.1f64</span>).into(), (<span class="number">0.1f64</span>..<span class="number">0.2f64</span>).into()],
                     ..Default::default()
                 }),
                 sub_aggregation: Default::default(),
             }),
         )]
         .into_iter()
         .collect();

         <span class="kw">let </span>res = exec_request_with_query(agg_req, <span class="kw-2">&amp;</span>index, <span class="prelude-val">None</span>)<span class="question-mark">?</span>;

         <span class="macro">assert_eq!</span>(res[<span class="string">&quot;range&quot;</span>][<span class="string">&quot;buckets&quot;</span>][<span class="number">0</span>][<span class="string">&quot;key&quot;</span>], <span class="string">&quot;*-0&quot;</span>);
         <span class="macro">assert_eq!</span>(res[<span class="string">&quot;range&quot;</span>][<span class="string">&quot;buckets&quot;</span>][<span class="number">0</span>][<span class="string">&quot;doc_count&quot;</span>], <span class="number">0</span>);
         <span class="macro">assert_eq!</span>(res[<span class="string">&quot;range&quot;</span>][<span class="string">&quot;buckets&quot;</span>][<span class="number">1</span>][<span class="string">&quot;key&quot;</span>], <span class="string">&quot;0-0.1&quot;</span>);
         <span class="macro">assert_eq!</span>(res[<span class="string">&quot;range&quot;</span>][<span class="string">&quot;buckets&quot;</span>][<span class="number">1</span>][<span class="string">&quot;doc_count&quot;</span>], <span class="number">10</span>);
         <span class="macro">assert_eq!</span>(res[<span class="string">&quot;range&quot;</span>][<span class="string">&quot;buckets&quot;</span>][<span class="number">2</span>][<span class="string">&quot;key&quot;</span>], <span class="string">&quot;0.1-0.2&quot;</span>);
         <span class="macro">assert_eq!</span>(res[<span class="string">&quot;range&quot;</span>][<span class="string">&quot;buckets&quot;</span>][<span class="number">2</span>][<span class="string">&quot;doc_count&quot;</span>], <span class="number">10</span>);
         <span class="macro">assert_eq!</span>(res[<span class="string">&quot;range&quot;</span>][<span class="string">&quot;buckets&quot;</span>][<span class="number">3</span>][<span class="string">&quot;key&quot;</span>], <span class="string">&quot;0.2-*&quot;</span>);
         <span class="macro">assert_eq!</span>(res[<span class="string">&quot;range&quot;</span>][<span class="string">&quot;buckets&quot;</span>][<span class="number">3</span>][<span class="string">&quot;doc_count&quot;</span>], <span class="number">80</span>);

         <span class="prelude-val">Ok</span>(())
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>range_keyed_buckets_test() -&gt; <span class="kw">crate</span>::Result&lt;()&gt; {
         <span class="kw">let </span>index = get_test_index_with_num_docs(<span class="bool-val">false</span>, <span class="number">100</span>)<span class="question-mark">?</span>;

         <span class="kw">let </span>agg_req: Aggregations = <span class="macro">vec!</span>[(
             <span class="string">&quot;range&quot;</span>.to_string(),
             Aggregation::Bucket(BucketAggregation {
                 bucket_agg: BucketAggregationType::Range(RangeAggregation {
                     field: <span class="string">&quot;fraction_f64&quot;</span>.to_string(),
                     ranges: <span class="macro">vec!</span>[(<span class="number">0f64</span>..<span class="number">0.1f64</span>).into(), (<span class="number">0.1f64</span>..<span class="number">0.2f64</span>).into()],
                     keyed: <span class="bool-val">true</span>,
                 }),
                 sub_aggregation: Default::default(),
             }),
         )]
         .into_iter()
         .collect();

         <span class="kw">let </span>res = exec_request_with_query(agg_req, <span class="kw-2">&amp;</span>index, <span class="prelude-val">None</span>)<span class="question-mark">?</span>;

         <span class="macro">assert_eq!</span>(
             res,
             <span class="macro">json!</span>({
                 <span class="string">&quot;range&quot;</span>: {
                     <span class="string">&quot;buckets&quot;</span>: {
                         <span class="string">&quot;*-0&quot;</span>: { <span class="string">&quot;key&quot;</span>: <span class="string">&quot;*-0&quot;</span>, <span class="string">&quot;doc_count&quot;</span>: <span class="number">0</span>, <span class="string">&quot;to&quot;</span>: <span class="number">0.0</span>},
                         <span class="string">&quot;0-0.1&quot;</span>: {<span class="string">&quot;key&quot;</span>: <span class="string">&quot;0-0.1&quot;</span>, <span class="string">&quot;doc_count&quot;</span>: <span class="number">10</span>, <span class="string">&quot;from&quot;</span>: <span class="number">0.0</span>, <span class="string">&quot;to&quot;</span>: <span class="number">0.1</span>},
                         <span class="string">&quot;0.1-0.2&quot;</span>: {<span class="string">&quot;key&quot;</span>: <span class="string">&quot;0.1-0.2&quot;</span>, <span class="string">&quot;doc_count&quot;</span>: <span class="number">10</span>, <span class="string">&quot;from&quot;</span>: <span class="number">0.1</span>, <span class="string">&quot;to&quot;</span>: <span class="number">0.2</span>},
                         <span class="string">&quot;0.2-*&quot;</span>: {<span class="string">&quot;key&quot;</span>: <span class="string">&quot;0.2-*&quot;</span>, <span class="string">&quot;doc_count&quot;</span>: <span class="number">80</span>, <span class="string">&quot;from&quot;</span>: <span class="number">0.2</span>},
                     }
                 }
             })
         );

         <span class="prelude-val">Ok</span>(())
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>range_custom_key_test() -&gt; <span class="kw">crate</span>::Result&lt;()&gt; {
         <span class="kw">let </span>index = get_test_index_with_num_docs(<span class="bool-val">false</span>, <span class="number">100</span>)<span class="question-mark">?</span>;

         <span class="kw">let </span>agg_req: Aggregations = <span class="macro">vec!</span>[(
             <span class="string">&quot;range&quot;</span>.to_string(),
             Aggregation::Bucket(BucketAggregation {
                 bucket_agg: BucketAggregationType::Range(RangeAggregation {
                     field: <span class="string">&quot;fraction_f64&quot;</span>.to_string(),
                     ranges: <span class="macro">vec!</span>[
                         RangeAggregationRange {
                             key: <span class="prelude-val">Some</span>(<span class="string">&quot;custom-key-0-to-0.1&quot;</span>.to_string()),
                             from: <span class="prelude-val">Some</span>(<span class="number">0f64</span>),
                             to: <span class="prelude-val">Some</span>(<span class="number">0.1f64</span>),
                         },
                         RangeAggregationRange {
                             key: <span class="prelude-val">None</span>,
                             from: <span class="prelude-val">Some</span>(<span class="number">0.1f64</span>),
                             to: <span class="prelude-val">Some</span>(<span class="number">0.2f64</span>),
                         },
                     ],
                     keyed: <span class="bool-val">false</span>,
                 }),
                 sub_aggregation: Default::default(),
             }),
         )]
         .into_iter()
         .collect();

         <span class="kw">let </span>res = exec_request_with_query(agg_req, <span class="kw-2">&amp;</span>index, <span class="prelude-val">None</span>)<span class="question-mark">?</span>;

         <span class="macro">assert_eq!</span>(
             res,
             <span class="macro">json!</span>({
                 <span class="string">&quot;range&quot;</span>: {
                     <span class="string">&quot;buckets&quot;</span>: [
                         {<span class="string">&quot;key&quot;</span>: <span class="string">&quot;*-0&quot;</span>, <span class="string">&quot;doc_count&quot;</span>: <span class="number">0</span>, <span class="string">&quot;to&quot;</span>: <span class="number">0.0</span>},
                         {<span class="string">&quot;key&quot;</span>: <span class="string">&quot;custom-key-0-to-0.1&quot;</span>, <span class="string">&quot;doc_count&quot;</span>: <span class="number">10</span>, <span class="string">&quot;from&quot;</span>: <span class="number">0.0</span>, <span class="string">&quot;to&quot;</span>: <span class="number">0.1</span>},
                         {<span class="string">&quot;key&quot;</span>: <span class="string">&quot;0.1-0.2&quot;</span>, <span class="string">&quot;doc_count&quot;</span>: <span class="number">10</span>, <span class="string">&quot;from&quot;</span>: <span class="number">0.1</span>, <span class="string">&quot;to&quot;</span>: <span class="number">0.2</span>},
                         {<span class="string">&quot;key&quot;</span>: <span class="string">&quot;0.2-*&quot;</span>, <span class="string">&quot;doc_count&quot;</span>: <span class="number">80</span>, <span class="string">&quot;from&quot;</span>: <span class="number">0.2</span>}
                     ]
                 }
             })
         );

         <span class="prelude-val">Ok</span>(())
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>range_date_test_single_segment() -&gt; <span class="kw">crate</span>::Result&lt;()&gt; {
         range_date_test_with_opt(<span class="bool-val">true</span>)
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>range_date_test_multi_segment() -&gt; <span class="kw">crate</span>::Result&lt;()&gt; {
         range_date_test_with_opt(<span class="bool-val">false</span>)
     }

     <span class="kw">fn </span>range_date_test_with_opt(merge_segments: bool) -&gt; <span class="kw">crate</span>::Result&lt;()&gt; {
         <span class="kw">let </span>index = get_test_index_2_segments(merge_segments)<span class="question-mark">?</span>;

         <span class="kw">let </span>agg_req: Aggregations = <span class="macro">vec!</span>[(
             <span class="string">&quot;date_ranges&quot;</span>.to_string(),
             Aggregation::Bucket(BucketAggregation {
                 bucket_agg: BucketAggregationType::Range(RangeAggregation {
                     field: <span class="string">&quot;date&quot;</span>.to_string(),
                     ranges: <span class="macro">vec!</span>[
                         RangeAggregationRange {
                             key: <span class="prelude-val">None</span>,
                             from: <span class="prelude-val">None</span>,
                             to: <span class="prelude-val">Some</span>(<span class="number">1546300800000000.0f64</span>),
                         },
                         RangeAggregationRange {
                             key: <span class="prelude-val">None</span>,
                             from: <span class="prelude-val">Some</span>(<span class="number">1546300800000000.0f64</span>),
                             to: <span class="prelude-val">Some</span>(<span class="number">1546387200000000.0f64</span>),
                         },
                     ],
                     keyed: <span class="bool-val">false</span>,
                 }),
                 sub_aggregation: Default::default(),
             }),
         )]
         .into_iter()
         .collect();

         <span class="kw">let </span>agg_res = exec_request(agg_req, <span class="kw-2">&amp;</span>index)<span class="question-mark">?</span>;

         <span class="kw">let </span>res: Value = serde_json::from_str(<span class="kw-2">&amp;</span>serde_json::to_string(<span class="kw-2">&amp;</span>agg_res)<span class="question-mark">?</span>)<span class="question-mark">?</span>;

         <span class="macro">assert_eq!</span>(
             res[<span class="string">&quot;date_ranges&quot;</span>][<span class="string">&quot;buckets&quot;</span>][<span class="number">0</span>][<span class="string">&quot;from_as_string&quot;</span>],
             Value::Null
         );
         <span class="macro">assert_eq!</span>(
             res[<span class="string">&quot;date_ranges&quot;</span>][<span class="string">&quot;buckets&quot;</span>][<span class="number">0</span>][<span class="string">&quot;key&quot;</span>],
             <span class="string">&quot;*-2019-01-01T00:00:00Z&quot;
         </span>);
         <span class="macro">assert_eq!</span>(
             res[<span class="string">&quot;date_ranges&quot;</span>][<span class="string">&quot;buckets&quot;</span>][<span class="number">1</span>][<span class="string">&quot;from_as_string&quot;</span>],
             <span class="string">&quot;2019-01-01T00:00:00Z&quot;
         </span>);
         <span class="macro">assert_eq!</span>(
             res[<span class="string">&quot;date_ranges&quot;</span>][<span class="string">&quot;buckets&quot;</span>][<span class="number">1</span>][<span class="string">&quot;to_as_string&quot;</span>],
             <span class="string">&quot;2019-01-02T00:00:00Z&quot;
         </span>);

         <span class="macro">assert_eq!</span>(
             res[<span class="string">&quot;date_ranges&quot;</span>][<span class="string">&quot;buckets&quot;</span>][<span class="number">2</span>][<span class="string">&quot;from_as_string&quot;</span>],
             <span class="string">&quot;2019-01-02T00:00:00Z&quot;
         </span>);
         <span class="macro">assert_eq!</span>(
             res[<span class="string">&quot;date_ranges&quot;</span>][<span class="string">&quot;buckets&quot;</span>][<span class="number">2</span>][<span class="string">&quot;to_as_string&quot;</span>],
             Value::Null
         );

         <span class="prelude-val">Ok</span>(())
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>range_custom_key_keyed_buckets_test() -&gt; <span class="kw">crate</span>::Result&lt;()&gt; {
         <span class="kw">let </span>index = get_test_index_with_num_docs(<span class="bool-val">false</span>, <span class="number">100</span>)<span class="question-mark">?</span>;

         <span class="kw">let </span>agg_req: Aggregations = <span class="macro">vec!</span>[(
             <span class="string">&quot;range&quot;</span>.to_string(),
             Aggregation::Bucket(BucketAggregation {
                 bucket_agg: BucketAggregationType::Range(RangeAggregation {
                     field: <span class="string">&quot;fraction_f64&quot;</span>.to_string(),
                     ranges: <span class="macro">vec!</span>[RangeAggregationRange {
                         key: <span class="prelude-val">Some</span>(<span class="string">&quot;custom-key-0-to-0.1&quot;</span>.to_string()),
                         from: <span class="prelude-val">Some</span>(<span class="number">0f64</span>),
                         to: <span class="prelude-val">Some</span>(<span class="number">0.1f64</span>),
                     }],
                     keyed: <span class="bool-val">true</span>,
                 }),
                 sub_aggregation: Default::default(),
             }),
         )]
         .into_iter()
         .collect();

         <span class="kw">let </span>res = exec_request_with_query(agg_req, <span class="kw-2">&amp;</span>index, <span class="prelude-val">None</span>)<span class="question-mark">?</span>;

         <span class="macro">assert_eq!</span>(
             res,
             <span class="macro">json!</span>({
                 <span class="string">&quot;range&quot;</span>: {
                     <span class="string">&quot;buckets&quot;</span>: {
                         <span class="string">&quot;*-0&quot;</span>: { <span class="string">&quot;key&quot;</span>: <span class="string">&quot;*-0&quot;</span>, <span class="string">&quot;doc_count&quot;</span>: <span class="number">0</span>, <span class="string">&quot;to&quot;</span>: <span class="number">0.0</span>},
                         <span class="string">&quot;custom-key-0-to-0.1&quot;</span>: {<span class="string">&quot;key&quot;</span>: <span class="string">&quot;custom-key-0-to-0.1&quot;</span>, <span class="string">&quot;doc_count&quot;</span>: <span class="number">10</span>, <span class="string">&quot;from&quot;</span>: <span class="number">0.0</span>, <span class="string">&quot;to&quot;</span>: <span class="number">0.1</span>},
                         <span class="string">&quot;0.1-*&quot;</span>: {<span class="string">&quot;key&quot;</span>: <span class="string">&quot;0.1-*&quot;</span>, <span class="string">&quot;doc_count&quot;</span>: <span class="number">90</span>, <span class="string">&quot;from&quot;</span>: <span class="number">0.1</span>},
                     }
                 }
             })
         );

         <span class="prelude-val">Ok</span>(())
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>bucket_test_extend_range_hole() {
         <span class="kw">let </span>buckets = <span class="macro">vec!</span>[(<span class="number">10f64</span>..<span class="number">20f64</span>).into(), (<span class="number">30f64</span>..<span class="number">40f64</span>).into()];
         <span class="kw">let </span>collector = get_collector_from_ranges(buckets, Type::F64);

         <span class="kw">let </span>buckets = collector.buckets;
         <span class="macro">assert_eq!</span>(buckets[<span class="number">0</span>].range.start, u64::MIN);
         <span class="macro">assert_eq!</span>(buckets[<span class="number">0</span>].range.end, <span class="number">10f64</span>.to_u64());
         <span class="macro">assert_eq!</span>(buckets[<span class="number">1</span>].range.start, <span class="number">10f64</span>.to_u64());
         <span class="macro">assert_eq!</span>(buckets[<span class="number">1</span>].range.end, <span class="number">20f64</span>.to_u64());
         <span class="comment">// Added bucket to fill hole
         </span><span class="macro">assert_eq!</span>(buckets[<span class="number">2</span>].range.start, <span class="number">20f64</span>.to_u64());
         <span class="macro">assert_eq!</span>(buckets[<span class="number">2</span>].range.end, <span class="number">30f64</span>.to_u64());
         <span class="macro">assert_eq!</span>(buckets[<span class="number">3</span>].range.start, <span class="number">30f64</span>.to_u64());
         <span class="macro">assert_eq!</span>(buckets[<span class="number">3</span>].range.end, <span class="number">40f64</span>.to_u64());
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>bucket_test_range_conversion_special_case() {
         <span class="comment">// the monotonic conversion between f64 and u64, does not map f64::MIN.to_u64() ==
         // u64::MIN, but the into trait converts f64::MIN/MAX to None
         </span><span class="kw">let </span>buckets = <span class="macro">vec!</span>[
             (f64::MIN..<span class="number">10f64</span>).into(),
             (<span class="number">10f64</span>..<span class="number">20f64</span>).into(),
             (<span class="number">20f64</span>..f64::MAX).into(),
         ];
         <span class="kw">let </span>collector = get_collector_from_ranges(buckets, Type::F64);

         <span class="kw">let </span>buckets = collector.buckets;
         <span class="macro">assert_eq!</span>(buckets[<span class="number">0</span>].range.start, u64::MIN);
         <span class="macro">assert_eq!</span>(buckets[<span class="number">0</span>].range.end, <span class="number">10f64</span>.to_u64());
         <span class="macro">assert_eq!</span>(buckets[<span class="number">1</span>].range.start, <span class="number">10f64</span>.to_u64());
         <span class="macro">assert_eq!</span>(buckets[<span class="number">1</span>].range.end, <span class="number">20f64</span>.to_u64());
         <span class="macro">assert_eq!</span>(buckets[<span class="number">2</span>].range.start, <span class="number">20f64</span>.to_u64());
         <span class="macro">assert_eq!</span>(buckets[<span class="number">2</span>].range.end, u64::MAX);
         <span class="macro">assert_eq!</span>(buckets.len(), <span class="number">3</span>);
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>bucket_range_test_negative_vals() {
         <span class="kw">let </span>buckets = <span class="macro">vec!</span>[(-<span class="number">10f64</span>..-<span class="number">1f64</span>).into()];
         <span class="kw">let </span>collector = get_collector_from_ranges(buckets, Type::F64);

         <span class="kw">let </span>buckets = collector.buckets;
         <span class="macro">assert_eq!</span>(<span class="kw-2">&amp;</span>buckets[<span class="number">0</span>].bucket.key.to_string(), <span class="string">&quot;*--10&quot;</span>);
         <span class="macro">assert_eq!</span>(<span class="kw-2">&amp;</span>buckets[buckets.len() - <span class="number">1</span>].bucket.key.to_string(), <span class="string">&quot;-1-*&quot;</span>);
     }
     <span class="attribute">#[test]
     </span><span class="kw">fn </span>bucket_range_test_positive_vals() {
         <span class="kw">let </span>buckets = <span class="macro">vec!</span>[(<span class="number">0f64</span>..<span class="number">10f64</span>).into()];
         <span class="kw">let </span>collector = get_collector_from_ranges(buckets, Type::F64);

         <span class="kw">let </span>buckets = collector.buckets;
         <span class="macro">assert_eq!</span>(<span class="kw-2">&amp;</span>buckets[<span class="number">0</span>].bucket.key.to_string(), <span class="string">&quot;*-0&quot;</span>);
         <span class="macro">assert_eq!</span>(<span class="kw-2">&amp;</span>buckets[buckets.len() - <span class="number">1</span>].bucket.key.to_string(), <span class="string">&quot;10-*&quot;</span>);
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>range_binary_search_test_u64() {
         <span class="kw">let </span>check_ranges = |ranges: Vec&lt;RangeAggregationRange&gt;| {
             <span class="kw">let </span>collector = get_collector_from_ranges(ranges, Type::U64);
             <span class="kw">let </span>search = |val: u64| collector.get_bucket_pos(val);

             <span class="macro">assert_eq!</span>(search(u64::MIN), <span class="number">0</span>);
             <span class="macro">assert_eq!</span>(search(<span class="number">9</span>), <span class="number">0</span>);
             <span class="macro">assert_eq!</span>(search(<span class="number">10</span>), <span class="number">1</span>);
             <span class="macro">assert_eq!</span>(search(<span class="number">11</span>), <span class="number">1</span>);
             <span class="macro">assert_eq!</span>(search(<span class="number">99</span>), <span class="number">1</span>);
             <span class="macro">assert_eq!</span>(search(<span class="number">100</span>), <span class="number">2</span>);
             <span class="macro">assert_eq!</span>(search(u64::MAX - <span class="number">1</span>), <span class="number">2</span>); <span class="comment">// Since the end range is never included, the max
                                                  // value
         </span>};

         <span class="kw">let </span>ranges = <span class="macro">vec!</span>[(<span class="number">10.0</span>..<span class="number">100.0</span>).into()];
         check_ranges(ranges);

         <span class="kw">let </span>ranges = <span class="macro">vec!</span>[
             RangeAggregationRange {
                 key: <span class="prelude-val">None</span>,
                 to: <span class="prelude-val">Some</span>(<span class="number">10.0</span>),
                 from: <span class="prelude-val">None</span>,
             },
             (<span class="number">10.0</span>..<span class="number">100.0</span>).into(),
         ];
         check_ranges(ranges);

         <span class="kw">let </span>ranges = <span class="macro">vec!</span>[
             RangeAggregationRange {
                 key: <span class="prelude-val">None</span>,
                 to: <span class="prelude-val">Some</span>(<span class="number">10.0</span>),
                 from: <span class="prelude-val">None</span>,
             },
             (<span class="number">10.0</span>..<span class="number">100.0</span>).into(),
             RangeAggregationRange {
                 key: <span class="prelude-val">None</span>,
                 to: <span class="prelude-val">None</span>,
                 from: <span class="prelude-val">Some</span>(<span class="number">100.0</span>),
             },
         ];
         check_ranges(ranges);
     }

     <span class="attribute">#[test]
     </span><span class="kw">fn </span>range_binary_search_test_f64() {
         <span class="kw">let </span>ranges = <span class="macro">vec!</span>[(<span class="number">10.0</span>..<span class="number">100.0</span>).into()];

         <span class="kw">let </span>collector = get_collector_from_ranges(ranges, Type::F64);
         <span class="kw">let </span>search = |val: u64| collector.get_bucket_pos(val);

         <span class="macro">assert_eq!</span>(search(u64::MIN), <span class="number">0</span>);
         <span class="macro">assert_eq!</span>(search(<span class="number">9f64</span>.to_u64()), <span class="number">0</span>);
         <span class="macro">assert_eq!</span>(search(<span class="number">10f64</span>.to_u64()), <span class="number">1</span>);
         <span class="macro">assert_eq!</span>(search(<span class="number">11f64</span>.to_u64()), <span class="number">1</span>);
         <span class="macro">assert_eq!</span>(search(<span class="number">99f64</span>.to_u64()), <span class="number">1</span>);
         <span class="macro">assert_eq!</span>(search(<span class="number">100f64</span>.to_u64()), <span class="number">2</span>);
         <span class="macro">assert_eq!</span>(search(u64::MAX - <span class="number">1</span>), <span class="number">2</span>); <span class="comment">// Since the end range is never included,
                                              // the max value
     </span>}
 }

 <span class="attribute">#[cfg(all(test, feature = <span class="string">&quot;unstable&quot;</span>))]
 </span><span class="kw">mod </span>bench {

     <span class="kw">use </span>itertools::Itertools;
     <span class="kw">use </span>rand::seq::SliceRandom;
     <span class="kw">use </span>rand::thread_rng;

     <span class="kw">use super</span>::<span class="kw-2">*</span>;
     <span class="kw">use </span><span class="kw">crate</span>::aggregation::bucket::range::tests::get_collector_from_ranges;

     <span class="kw">const </span>TOTAL_DOCS: u64 = <span class="number">1_000_000u64</span>;
     <span class="kw">const </span>NUM_DOCS: u64 = <span class="number">50_000u64</span>;

     <span class="kw">fn </span>get_collector_with_buckets(num_buckets: u64, num_docs: u64) -&gt; SegmentRangeCollector {
         <span class="kw">let </span>bucket_size = num_docs / num_buckets;
         <span class="kw">let </span><span class="kw-2">mut </span>buckets: Vec&lt;RangeAggregationRange&gt; = <span class="macro">vec!</span>[];
         <span class="kw">for </span>i <span class="kw">in </span><span class="number">0</span>..num_buckets {
             <span class="kw">let </span>bucket_start = (i * bucket_size) <span class="kw">as </span>f64;
             buckets.push((bucket_start..bucket_start + bucket_size <span class="kw">as </span>f64).into())
         }

         get_collector_from_ranges(buckets, Type::U64)
     }

     <span class="kw">fn </span>get_rand_docs(total_docs: u64, num_docs_returned: u64) -&gt; Vec&lt;u64&gt; {
         <span class="kw">let </span><span class="kw-2">mut </span>rng = thread_rng();

         <span class="kw">let </span>all_docs = (<span class="number">0</span>..total_docs - <span class="number">1</span>).collect_vec();
         <span class="kw">let </span><span class="kw-2">mut </span>vals = all_docs
             .as_slice()
             .choose_multiple(<span class="kw-2">&amp;mut </span>rng, num_docs_returned <span class="kw">as </span>usize)
             .cloned()
             .collect_vec();
         vals.sort();
         vals
     }

     <span class="kw">fn </span>bench_range_binary_search(b: <span class="kw-2">&amp;mut </span>test::Bencher, num_buckets: u64) {
         <span class="kw">let </span>collector = get_collector_with_buckets(num_buckets, TOTAL_DOCS);
         <span class="kw">let </span>vals = get_rand_docs(TOTAL_DOCS, NUM_DOCS);
         b.iter(|| {
             <span class="kw">let </span><span class="kw-2">mut </span>bucket_pos = <span class="number">0</span>;
             <span class="kw">for </span>val <span class="kw">in </span><span class="kw-2">&amp;</span>vals {
                 bucket_pos = collector.get_bucket_pos(<span class="kw-2">*</span>val);
             }
             bucket_pos
         })
     }

     <span class="attribute">#[bench]
     </span><span class="kw">fn </span>bench_range_100_buckets(b: <span class="kw-2">&amp;mut </span>test::Bencher) {
         bench_range_binary_search(b, <span class="number">100</span>)
     }

     <span class="attribute">#[bench]
     </span><span class="kw">fn </span>bench_range_10_buckets(b: <span class="kw-2">&amp;mut </span>test::Bencher) {
         bench_range_binary_search(b, <span class="number">10</span>)
     }
 }
 </code></pre></div>
 </section></div></main><div id="rustdoc-vars" data-root-path="../../../../" data-current-crate="tantivy" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html>