From 8bd43bb553ceabd1d434b6cff0927a5c04a33761 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jos=C3=A9=20Valim?= <jose.valim@dashbit.co>
Date: Sat, 6 Jul 2024 22:11:15 +0200
Subject: [PATCH] Improve tokenization of function names, closes #1930

---
 assets/js/search-page.js                      | 49 +++++++++++++++----
 .../{html-7XSQ4GTY.js => html-5OPRASEH.js}    |  2 +-
 2 files changed, 40 insertions(+), 11 deletions(-)
 rename formatters/html/dist/{html-7XSQ4GTY.js => html-5OPRASEH.js} (78%)

diff --git a/assets/js/search-page.js b/assets/js/search-page.js
index e3a029e58..74793e731 100644
--- a/assets/js/search-page.js
+++ b/assets/js/search-page.js
@@ -153,17 +153,46 @@ function docTokenSplitter (builder) {
 }
 
 function docTokenFunction (token) {
-  // Split on : . / _ - to make easier to partially match on function names.
-  // We split only when tokenizing, not when searching.
-  const tokens = token
-    .toString()
-    .split(/\:|\.|\/|_|-/)
-    .map(part => {
-      return token.clone().update(() => part)
-    })
+  // If we have something with an arity, we split on : . to make partial
+  // matches easier. We split only when tokenizing, not when searching.
+  // Below we use ExDoc.Markdown.to_ast/2 as an example.
+  const tokens = [token]
+  const arityRegex = /\/\d+$/
+  const namespaceRegex = /\:|\./
+  let toSplitWords = token.toString()
+
+  if(arityRegex.test(toSplitWords)) {
+    const withoutArity = token
+      .toString()
+      .replace(arityRegex, "")
+
+    // This token represents ExDoc.Markdown.to_ast
+    tokens.push(token.clone().update(() => withoutArity))
+
+    // And now we get each part as token: ExDoc, Markdown, and to_ast
+    let parts = withoutArity.split(namespaceRegex)
+
+    if(parts.length > 1) {
+      for(let part of parts) {
+        tokens.push(token.clone().update(() => part))
+      }
+
+      // Let's also add to_ast/2
+      let lastWithArity = token.toString().split(namespaceRegex)
+      tokens.push(token.clone().update(() => lastWithArity[lastWithArity.length - 1]))
+    }
 
-  if (tokens.length > 1) {
-    return [...tokens, token]
+    toSplitWords = parts[parts.length - 1]
+  }
+
+  // Now split the function name (or the token, if that's all we had),
+  // on _ or - (but we keep the original)
+  let words = toSplitWords.split(/\_|\-/)
+
+  if(words.length > 1) {
+    for(let word of words) {
+      tokens.push(token.clone().update(() => word))
+    }
   }
 
   return tokens
diff --git a/formatters/html/dist/html-7XSQ4GTY.js b/formatters/html/dist/html-5OPRASEH.js
similarity index 78%
rename from formatters/html/dist/html-7XSQ4GTY.js
rename to formatters/html/dist/html-5OPRASEH.js
index 2bc886af4..9bbc50513 100644
--- a/formatters/html/dist/html-7XSQ4GTY.js
+++ b/formatters/html/dist/html-5OPRASEH.js
@@ -1,5 +1,5 @@
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t=[],n=[{prefix:"",node:this}];n.length;){var i=n.pop(),r=Object.keys(i.node.edges),s=r.length;i.node.final&&(i.prefix.charAt(0),t.push(i.prefix));for(var o=0;o<s;o++){var a=r[o];n.push({prefix:i.prefix.concat(a),node:i.node.edges[a]})}}return t},e.TokenSet.prototype.toString=function(){if(this._str)return this._str;for(var t=this.final?"1":"0",n=Object.keys(this.edges).sort(),i=n.length,r=0;r<i;r++){var s=n[r],o=this.edges[s];t=t+s+o.id}return t},e.TokenSet.prototype.intersect=function(t){for(var n=new e.TokenSet,i=void 0,r=[{qNode:t,output:n,node:this}];r.length;){i=r.pop();for(var s=Object.keys(i.qNode.edges),o=s.length,a=Object.keys(i.node.edges),l=a.length,u=0;u<o;u++)for(var f=s[u],y=0;y<l;y++){var g=a[y];if(g==f||f=="*"){var L=i.node.edges[g],b=i.qNode.edges[f],T=L.final&&b.final,m=void 0;g in i.output.edges?(m=i.output.edges[g],m.final=m.final||T):(m=new e.TokenSet,m.final=T,i.output.edges[g]=m),r.push({qNode:b,output:m,node:L})}}}return n},e.TokenSet.Builder=function(){this.previousWord="",this.root=new e.TokenSet,this.uncheckedNodes=[],this.minimizedNodes={}},e.TokenSet.Builder.prototype.insert=function(t){var n,i=0;if(t<this.previousWord)throw new Error("Out of order word insertion");for(var r=0;r<t.length&&r<this.previousWord.length&&t[r]==this.previousWord[r];r++)i++;this.minimize(i),this.uncheckedNodes.length==0?n=this.root:n=this.uncheckedNodes[this.uncheckedNodes.length-1].child;for(var r=i;r<t.length;r++){var s=new e.TokenSet,o=t[r];n.edges[o]=s,this.uncheckedNodes.push({parent:n,char:o,child:s}),n=s}n.final=!0,this.previousWord=t},e.TokenSet.Builder.prototype.finish=function(){this.minimize(0)},e.TokenSet.Builder.prototype.minimize=function(t){for(var n=this.uncheckedNodes.length-1;n>=t;n--){var i=this.uncheckedNodes[n],r=i.child.toString();r in this.minimizedNodes?i.parent.edges[i.char]=this.minimizedNodes[r]:(i.child._str=r,this.minimizedNodes[r]=i.child),this.uncheckedNodes.pop()}};e.Index=function(t){this.invertedIndex=t.invertedIndex,this.fieldVectors=t.fieldVectors,this.tokenSet=t.tokenSet,this.fields=t.fields,this.pipeline=t.pipeline},e.Index.prototype.search=function(t){return this.query(function(n){var i=new e.QueryParser(t,n);i.parse()})},e.Index.prototype.query=function(t){for(var n=new e.Query(this.fields),i=Object.create(null),r=Object.create(null),s=Object.create(null),o=Object.create(null),a=Object.create(null),l=0;l<this.fields.length;l++)r[this.fields[l]]=new e.Vector;t.call(n,n);for(var l=0;l<n.clauses.length;l++){var u=n.clauses[l],f=null,y=e.Set.empty;u.usePipeline?f=this.pipeline.runString(u.term,{fields:u.fields}):f=[u.term];for(var g=0;g<f.length;g++){var L=f[g];u.term=L;var b=e.TokenSet.fromClause(u),T=this.tokenSet.intersect(b).toArray();if(T.length===0&&u.presence===e.Query.presence.REQUIRED){for(var m=0;m<u.fields.length;m++){var h=u.fields[m];o[h]=e.Set.empty}break}for(var O=0;O<T.length;O++)for(var w=T[O],Q=this.invertedIndex[w],F=Q._index,m=0;m<u.fields.length;m++){var h=u.fields[m],S=Q[h],C=Object.keys(S),D=w+"/"+h,V=new e.Set(C);if(u.presence==e.Query.presence.REQUIRED&&(y=y.union(V),o[h]===void 0&&(o[h]=e.Set.complete)),u.presence==e.Query.presence.PROHIBITED){a[h]===void 0&&(a[h]=e.Set.empty),a[h]=a[h].union(V);continue}if(r[h].upsert(F,u.boost,function(ti,ni){return ti+ni}),!s[D]){for(var ae=0;ae<C.length;ae++){var fe=C[ae],j=new e.FieldRef(fe,h),pe=S[fe],he;(he=i[j])===void 0?i[j]=new e.MatchData(w,h,pe):he.add(w,h,pe)}s[D]=!0}}}if(u.presence===e.Query.presence.REQUIRED)for(var m=0;m<u.fields.length;m++){var h=u.fields[m];o[h]=o[h].intersect(y)}}for(var ce=e.Set.complete,Z=e.Set.empty,l=0;l<this.fields.length;l++){var h=this.fields[l];o[h]&&(ce=ce.intersect(o[h])),a[h]&&(Z=Z.union(a[h]))}var d=Object.keys(i),v=[],U=Object.create(null);if(n.isNegated()){d=Object.keys(this.fieldVectors);for(var l=0;l<d.length;l++){var j=d[l],R=e.FieldRef.fromString(j);i[j]=new e.MatchData}}for(var l=0;l<d.length;l++){var R=e.FieldRef.fromString(d[l]),p=R.docRef;if(ce.contains(p)&&!Z.contains(p)){var x=this.fieldVectors[R],W=r[R.fieldName].similarity(x),ee;if((ee=U[p])!==void 0)ee.score+=W,ee.matchData.combine(i[R]);else{var E={ref:p,score:W,matchData:i[R]};U[p]=E,v.push(E)}}}return v.sort(function(Zn,ei){return ei.score-Zn.score})},e.Index.prototype.toJSON=function(){var t=Object.keys(this.invertedIndex).sort().map(function(i){return[i,this.invertedIndex[i]]},this),n=Object.keys(this.fieldVectors).map(function(i){return[i,this.fieldVectors[i].toJSON()]},this);return{version:e.version,fields:this.fields,fieldVectors:n,invertedIndex:t,pipeline:this.pipeline.toJSON()}},e.Index.load=function(t){var n={},i={},r=t.fieldVectors,s=Object.create(null),o=t.invertedIndex,a=new e.TokenSet.Builder,l=e.Pipeline.load(t.pipeline);t.version!=e.version&&e.utils.warn("Version mismatch when loading serialised index. Current version of lunr '"+e.version+"' does not match serialized index '"+t.version+"'");for(var u=0;u<r.length;u++){var f=r[u],y=f[0],g=f[1];i[y]=new e.Vector(g)}for(var u=0;u<o.length;u++){var f=o[u],L=f[0],b=f[1];a.insert(L),s[L]=b}return a.finish(),n.fields=t.fields,n.fieldVectors=i,n.invertedIndex=s,n.tokenSet=a.root,n.pipeline=l,new e.Index(n)};e.Builder=function(){this._ref="id",this._fields=Object.create(null),this._documents=Object.create(null),this.invertedIndex=Object.create(null),this.fieldTermFrequencies={},this.fieldLengths={},this.tokenizer=e.tokenizer,this.pipeline=new e.Pipeline,this.searchPipeline=new e.Pipeline,this.documentCount=0,this._b=.75,this._k1=1.2,this.termIndex=0,this.metadataWhitelist=[]},e.Builder.prototype.ref=function(t){this._ref=t},e.Builder.prototype.field=function(t,n){if(/\//.test(t))throw new RangeError("Field '"+t+"' contains illegal character '/'");this._fields[t]=n||{}},e.Builder.prototype.b=function(t){t<0?this._b=0:t>1?this._b=1:this._b=t},e.Builder.prototype.k1=function(t){this._k1=t},e.Builder.prototype.add=function(t,n){var i=t[this._ref],r=Object.keys(this._fields);this._documents[i]=n||{},this.documentCount+=1;for(var s=0;s<r.length;s++){var o=r[s],a=this._fields[o].extractor,l=a?a(t):t[o],u=this.tokenizer(l,{fields:[o]}),f=this.pipeline.run(u),y=new e.FieldRef(i,o),g=Object.create(null);this.fieldTermFrequencies[y]=g,this.fieldLengths[y]=0,this.fieldLengths[y]+=f.length;for(var L=0;L<f.length;L++){var b=f[L];if(g[b]==null&&(g[b]=0),g[b]+=1,this.invertedIndex[b]==null){var T=Object.create(null);T._index=this.termIndex,this.termIndex+=1;for(var m=0;m<r.length;m++)T[r[m]]=Object.create(null);this.invertedIndex[b]=T}this.invertedIndex[b][o][i]==null&&(this.invertedIndex[b][o][i]=Object.create(null));for(var h=0;h<this.metadataWhitelist.length;h++){var O=this.metadataWhitelist[h],w=b.metadata[O];this.invertedIndex[b][o][i][O]==null&&(this.invertedIndex[b][o][i][O]=[]),this.invertedIndex[b][o][i][O].push(w)}}}},e.Builder.prototype.calculateAverageFieldLengths=function(){for(var t=Object.keys(this.fieldLengths),n=t.length,i={},r={},s=0;s<n;s++){var o=e.FieldRef.fromString(t[s]),a=o.fieldName;r[a]||(r[a]=0),r[a]+=1,i[a]||(i[a]=0),i[a]+=this.fieldLengths[o]}for(var l=Object.keys(this._fields),s=0;s<l.length;s++){var u=l[s];i[u]=i[u]/r[u]}this.averageFieldLength=i},e.Builder.prototype.createFieldVectors=function(){for(var t={},n=Object.keys(this.fieldTermFrequencies),i=n.length,r=Object.create(null),s=0;s<i;s++){for(var o=e.FieldRef.fromString(n[s]),a=o.fieldName,l=this.fieldLengths[o],u=new e.Vector,f=this.fieldTermFrequencies[o],y=Object.keys(f),g=y.length,L=this._fields[a].boost||1,b=this._documents[o.docRef].boost||1,T=0;T<g;T++){var m=y[T],h=f[m],O=this.invertedIndex[m]._index,w,Q,F;r[m]===void 0?(w=e.idf(this.invertedIndex[m],this.documentCount),r[m]=w):w=r[m],Q=w*((this._k1+1)*h)/(this._k1*(1-this._b+this._b*(l/this.averageFieldLength[a]))+h),Q*=L,Q*=b,F=Math.round(Q*1e3)/1e3,u.insert(O,F)}t[o]=u}this.fieldVectors=t},e.Builder.prototype.createTokenSet=function(){this.tokenSet=e.TokenSet.fromArray(Object.keys(this.invertedIndex).sort())},e.Builder.prototype.build=function(){return this.calculateAverageFieldLengths(),this.createFieldVectors(),this.createTokenSet(),new e.Index({invertedIndex:this.invertedIndex,fieldVectors:this.fieldVectors,tokenSet:this.tokenSet,fields:Object.keys(this._fields),pipeline:this.searchPipeline})},e.Builder.prototype.use=function(t){var n=Array.prototype.slice.call(arguments,1);n.unshift(this),t.apply(this,n)},e.MatchData=function(t,n,i){for(var r=Object.create(null),s=Object.keys(i||{}),o=0;o<s.length;o++){var a=s[o];r[a]=i[a].slice()}this.metadata=Object.create(null),t!==void 0&&(this.metadata[t]=Object.create(null),this.metadata[t][n]=r)},e.MatchData.prototype.combine=function(t){for(var n=Object.keys(t.metadata),i=0;i<n.length;i++){var r=n[i],s=Object.keys(t.metadata[r]);this.metadata[r]==null&&(this.metadata[r]=Object.create(null));for(var o=0;o<s.length;o++){var a=s[o],l=Object.keys(t.metadata[r][a]);this.metadata[r][a]==null&&(this.metadata[r][a]=Object.create(null));for(var u=0;u<l.length;u++){var f=l[u];this.metadata[r][a][f]==null?this.metadata[r][a][f]=t.metadata[r][a][f]:this.metadata[r][a][f]=this.metadata[r][a][f].concat(t.metadata[r][a][f])}}}},e.MatchData.prototype.add=function(t,n,i){if(!(t in this.metadata)){this.metadata[t]=Object.create(null),this.metadata[t][n]=i;return}if(!(n in this.metadata[t])){this.metadata[t][n]=i;return}for(var r=Object.keys(i),s=0;s<r.length;s++){var o=r[s];o in this.metadata[t][n]?this.metadata[t][n][o]=this.metadata[t][n][o].concat(i[o]):this.metadata[t][n][o]=i[o]}},e.Query=function(t){this.clauses=[],this.allFields=t},e.Query.wildcard=new String("*"),e.Query.wildcard.NONE=0,e.Query.wildcard.LEADING=1,e.Query.wildcard.TRAILING=2,e.Query.presence={OPTIONAL:1,REQUIRED:2,PROHIBITED:3},e.Query.prototype.clause=function(t){return"fields"in t||(t.fields=this.allFields),"boost"in t||(t.boost=1),"usePipeline"in t||(t.usePipeline=!0),"wildcard"in t||(t.wildcard=e.Query.wildcard.NONE),t.wildcard&e.Query.wildcard.LEADING&&t.term.charAt(0)!=e.Query.wildcard&&(t.term="*"+t.term),t.wildcard&e.Query.wildcard.TRAILING&&t.term.slice(-1)!=e.Query.wildcard&&(t.term=""+t.term+"*"),"presence"in t||(t.presence=e.Query.presence.OPTIONAL),this.clauses.push(t),this},e.Query.prototype.isNegated=function(){for(var t=0;t<this.clauses.length;t++)if(this.clauses[t].presence!=e.Query.presence.PROHIBITED)return!1;return!0},e.Query.prototype.term=function(t,n){if(Array.isArray(t))return t.forEach(function(r){this.term(r,e.utils.clone(n))},this),this;var i=n||{};return i.term=t.toString(),this.clause(i),this},e.QueryParseError=function(t,n,i){this.name="QueryParseError",this.message=t,this.start=n,this.end=i},e.QueryParseError.prototype=new Error,e.QueryLexer=function(t){this.lexemes=[],this.str=t,this.length=t.length,this.pos=0,this.start=0,this.escapeCharPositions=[]},e.QueryLexer.prototype.run=function(){for(var t=e.QueryLexer.lexText;t;)t=t(this)},e.QueryLexer.prototype.sliceString=function(){for(var t=[],n=this.start,i=this.pos,r=0;r<this.escapeCharPositions.length;r++)i=this.escapeCharPositions[r],t.push(this.str.slice(n,i)),n=i+1;return t.push(this.str.slice(n,this.pos)),this.escapeCharPositions.length=0,t.join("")},e.QueryLexer.prototype.emit=function(t){this.lexemes.push({type:t,str:this.sliceString(),start:this.start,end:this.pos}),this.start=this.pos},e.QueryLexer.prototype.escapeCharacter=function(){this.escapeCharPositions.push(this.pos-1),this.pos+=1},e.QueryLexer.prototype.next=function(){if(this.pos>=this.length)return e.QueryLexer.EOS;var t=this.str.charAt(this.pos);return this.pos+=1,t},e.QueryLexer.prototype.width=function(){return this.pos-this.start},e.QueryLexer.prototype.ignore=function(){this.start==this.pos&&(this.pos+=1),this.start=this.pos},e.QueryLexer.prototype.backup=function(){this.pos-=1},e.QueryLexer.prototype.acceptDigitRun=function(){var t,n;do t=this.next(),n=t.charCodeAt(0);while(n>47&&n<58);t!=e.QueryLexer.EOS&&this.backup()},e.QueryLexer.prototype.more=function(){return this.pos<this.length},e.QueryLexer.EOS="EOS",e.QueryLexer.FIELD="FIELD",e.QueryLexer.TERM="TERM",e.QueryLexer.EDIT_DISTANCE="EDIT_DISTANCE",e.QueryLexer.BOOST="BOOST",e.QueryLexer.PRESENCE="PRESENCE",e.QueryLexer.lexField=function(t){return t.backup(),t.emit(e.QueryLexer.FIELD),t.ignore(),e.QueryLexer.lexText},e.QueryLexer.lexTerm=function(t){if(t.width()>1&&(t.backup(),t.emit(e.QueryLexer.TERM)),t.ignore(),t.more())return e.QueryLexer.lexText},e.QueryLexer.lexEditDistance=function(t){return t.ignore(),t.acceptDigitRun(),t.emit(e.QueryLexer.EDIT_DISTANCE),e.QueryLexer.lexText},e.QueryLexer.lexBoost=function(t){return t.ignore(),t.acceptDigitRun(),t.emit(e.QueryLexer.BOOST),e.QueryLexer.lexText},e.QueryLexer.lexEOS=function(t){t.width()>0&&t.emit(e.QueryLexer.TERM)},e.QueryLexer.termSeparator=e.tokenizer.separator,e.QueryLexer.lexText=function(t){for(;;){var n=t.next();if(n==e.QueryLexer.EOS)return e.QueryLexer.lexEOS;if(n.charCodeAt(0)==92){t.escapeCharacter();continue}if(n==":")return e.QueryLexer.lexField;if(n=="~")return t.backup(),t.width()>0&&t.emit(e.QueryLexer.TERM),e.QueryLexer.lexEditDistance;if(n=="^")return t.backup(),t.width()>0&&t.emit(e.QueryLexer.TERM),e.QueryLexer.lexBoost;if(n=="+"&&t.width()===1||n=="-"&&t.width()===1)return t.emit(e.QueryLexer.PRESENCE),e.QueryLexer.lexText;if(n.match(e.QueryLexer.termSeparator))return e.QueryLexer.lexTerm}},e.QueryParser=function(t,n){this.lexer=new e.QueryLexer(t),this.query=n,this.currentClause={},this.lexemeIdx=0},e.QueryParser.prototype.parse=function(){this.lexer.run(),this.lexemes=this.lexer.lexemes;for(var t=e.QueryParser.parseClause;t;)t=t(this);return this.query},e.QueryParser.prototype.peekLexeme=function(){return this.lexemes[this.lexemeIdx]},e.QueryParser.prototype.consumeLexeme=function(){var t=this.peekLexeme();return this.lexemeIdx+=1,t},e.QueryParser.prototype.nextClause=function(){var t=this.currentClause;this.query.clause(t),this.currentClause={}},e.QueryParser.parseClause=function(t){var n=t.peekLexeme();if(n!=null)switch(n.type){case e.QueryLexer.PRESENCE:return e.QueryParser.parsePresence;case e.QueryLexer.FIELD:return e.QueryParser.parseField;case e.QueryLexer.TERM:return e.QueryParser.parseTerm;default:var i="expected either a field or a term, found "+n.type;throw n.str.length>=1&&(i+=" with value '"+n.str+"'"),new e.QueryParseError(i,n.start,n.end)}},e.QueryParser.parsePresence=function(t){var n=t.consumeLexeme();if(n!=null){switch(n.str){case"-":t.currentClause.presence=e.Query.presence.PROHIBITED;break;case"+":t.currentClause.presence=e.Query.presence.REQUIRED;break;default:var i="unrecognised presence operator'"+n.str+"'";throw new e.QueryParseError(i,n.start,n.end)}var r=t.peekLexeme();if(r==null){var i="expecting term or field, found nothing";throw new e.QueryParseError(i,n.start,n.end)}switch(r.type){case e.QueryLexer.FIELD:return e.QueryParser.parseField;case e.QueryLexer.TERM:return e.QueryParser.parseTerm;default:var i="expecting term or field, found '"+r.type+"'";throw new e.QueryParseError(i,r.start,r.end)}}},e.QueryParser.parseField=function(t){var n=t.consumeLexeme();if(n!=null){if(t.query.allFields.indexOf(n.str)==-1){var i=t.query.allFields.map(function(o){return"'"+o+"'"}).join(", "),r="unrecognised field '"+n.str+"', possible fields: "+i;throw new e.QueryParseError(r,n.start,n.end)}t.currentClause.fields=[n.str];var s=t.peekLexeme();if(s==null){var r="expecting term, found nothing";throw new e.QueryParseError(r,n.start,n.end)}switch(s.type){case e.QueryLexer.TERM:return e.QueryParser.parseTerm;default:var r="expecting term, found '"+s.type+"'";throw new e.QueryParseError(r,s.start,s.end)}}},e.QueryParser.parseTerm=function(t){var n=t.consumeLexeme();if(n!=null){t.currentClause.term=n.str.toLowerCase(),n.str.indexOf("*")!=-1&&(t.currentClause.usePipeline=!1);var i=t.peekLexeme();if(i==null){t.nextClause();return}switch(i.type){case e.QueryLexer.TERM:return t.nextClause(),e.QueryParser.parseTerm;case e.QueryLexer.FIELD:return t.nextClause(),e.QueryParser.parseField;case e.QueryLexer.EDIT_DISTANCE:return e.QueryParser.parseEditDistance;case e.QueryLexer.BOOST:return e.QueryParser.parseBoost;case e.QueryLexer.PRESENCE:return t.nextClause(),e.QueryParser.parsePresence;default:var r="Unexpected lexeme type '"+i.type+"'";throw new e.QueryParseError(r,i.start,i.end)}}},e.QueryParser.parseEditDistance=function(t){var n=t.consumeLexeme();if(n!=null){var i=parseInt(n.str,10);if(isNaN(i)){var r="edit distance must be numeric";throw new e.QueryParseError(r,n.start,n.end)}t.currentClause.editDistance=i;var s=t.peekLexeme();if(s==null){t.nextClause();return}switch(s.type){case e.QueryLexer.TERM:return t.nextClause(),e.QueryParser.parseTerm;case e.QueryLexer.FIELD:return t.nextClause(),e.QueryParser.parseField;case e.QueryLexer.EDIT_DISTANCE:return e.QueryParser.parseEditDistance;case e.QueryLexer.BOOST:return e.QueryParser.parseBoost;case e.QueryLexer.PRESENCE:return t.nextClause(),e.QueryParser.parsePresence;default:var r="Unexpected lexeme type '"+s.type+"'";throw new e.QueryParseError(r,s.start,s.end)}}},e.QueryParser.parseBoost=function(t){var n=t.consumeLexeme();if(n!=null){var i=parseInt(n.str,10);if(isNaN(i)){var r="boost must be numeric";throw new e.QueryParseError(r,n.start,n.end)}t.currentClause.boost=i;var s=t.peekLexeme();if(s==null){t.nextClause();return}switch(s.type){case e.QueryLexer.TERM:return t.nextClause(),e.QueryParser.parseTerm;case e.QueryLexer.FIELD:return t.nextClause(),e.QueryParser.parseField;case e.QueryLexer.EDIT_DISTANCE:return e.QueryParser.parseEditDistance;case e.QueryLexer.BOOST:return e.QueryParser.parseBoost;case e.QueryLexer.PRESENCE:return t.nextClause(),e.QueryParser.parsePresence;default:var r="Unexpected lexeme type '"+s.type+"'";throw new e.QueryParseError(r,s.start,s.end)}}},function(t,n){typeof define=="function"&&define.amd?define(n):typeof dn=="object"?fn.exports=n():t.lunr=n()}(this,function(){return 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t={ational:"ate",tional:"tion",enci:"ence",anci:"ance",izer:"ize",bli:"ble",alli:"al",entli:"ent",eli:"e",ousli:"ous",ization:"ize",ation:"ate",ator:"ate",alism:"al",iveness:"ive",fulness:"ful",ousness:"ous",aliti:"al",iviti:"ive",biliti:"ble",logi:"log"},n={icate:"ic",ative:"",alize:"al",iciti:"ic",ical:"ic",ful:"",ness:""},i="[^aeiou]",r="[aeiouy]",s=i+"[^aeiouy]*",o=r+"[aeiou]*",a="^("+s+")?"+o+s,l="^("+s+")?"+o+s+"("+o+")?$",u="^("+s+")?"+o+s+o+s,f="^("+s+")?"+r,y=new RegExp(a),g=new RegExp(u),L=new RegExp(l),b=new RegExp(f),T=/^(.+?)(ss|i)es$/,m=/^(.+?)([^s])s$/,h=/^(.+?)eed$/,O=/^(.+?)(ed|ing)$/,w=/.$/,Q=/(at|bl|iz)$/,F=new RegExp("([^aeiouylsz])\\1$"),S=new RegExp("^"+s+r+"[^aeiouwxy]$"),C=/^(.+?[^aeiou])y$/,D=/^(.+?)(ational|tional|enci|anci|izer|bli|alli|entli|eli|ousli|ization|ation|ator|alism|iveness|fulness|ousness|aliti|iviti|biliti|logi)$/,V=/^(.+?)(icate|ative|alize|iciti|ical|ful|ness)$/,ae=/^(.+?)(al|ance|ence|er|ic|able|ible|ant|ement|ment|ent|ou|ism|ate|iti|ous|ive|ize)$/,fe=/^(.+?)(s|t)(ion)$/,j=/^(.+?)e$/,pe=/ll$/,he=new RegExp("^"+s+r+"[^aeiouwxy]$"),ce=function(d){var v,U,R,p,x,W,ee;if(d.length<3)return d;if(R=d.substr(0,1),R=="y"&&(d=R.toUpperCase()+d.substr(1)),p=T,x=m,p.test(d)?d=d.replace(p,"$1$2"):x.test(d)&&(d=d.replace(x,"$1$2")),p=h,x=O,p.test(d)){var E=p.exec(d);p=y,p.test(E[1])&&(p=w,d=d.replace(p,""))}else if(x.test(d)){var E=x.exec(d);v=E[1],x=b,x.test(v)&&(d=v,x=Q,W=F,ee=S,x.test(d)?d=d+"e":W.test(d)?(p=w,d=d.replace(p,"")):ee.test(d)&&(d=d+"e"))}if(p=C,p.test(d)){var E=p.exec(d);v=E[1],d=v+"i"}if(p=D,p.test(d)){var E=p.exec(d);v=E[1],U=E[2],p=y,p.test(v)&&(d=v+t[U])}if(p=V,p.test(d)){var E=p.exec(d);v=E[1],U=E[2],p=y,p.test(v)&&(d=v+n[U])}if(p=ae,x=fe,p.test(d)){var E=p.exec(d);v=E[1],p=g,p.test(v)&&(d=v)}else if(x.test(d)){var E=x.exec(d);v=E[1]+E[2],x=g,x.test(v)&&(d=v)}if(p=j,p.test(d)){var E=p.exec(d);v=E[1],p=g,x=L,W=he,(p.test(v)||x.test(v)&&!W.test(v))&&(d=v)}return p=pe,x=g,p.test(d)&&x.test(d)&&(p=w,d=d.replace(p,"")),R=="y"&&(d=R.toLowerCase()+d.substr(1)),d};return function(Z){return Z.update(ce)}}(),e.Pipeline.registerFunction(e.stemmer,"stemmer");e.generateStopWordFilter=function(t){var n=t.reduce(function(i,r){return i[r]=r,i},{});return function(i){if(i&&n[i.toString()]!==i.toString())return i}},e.stopWordFilter=e.generateStopWordFilter(["a","able","about","across","after","all","almost","also","am","among","an","and","any","are","as","at","be","because","been","but","by","can","cannot","could","dear","did","do","does","either","else","ever","every","for","from","get","got","had","has","have","he","her","hers","him","his","how","however","i","if","in","into","is","it","its","just","least","let","like","likely","may","me","might","most","must","my","neither","no","nor","not","of","off","often","on","only","or","other","our","own","rather","said","say","says","she","should","since","so","some","than","that","the","their","them","then","there","these","they","this","tis","to","too","twas","us","wants","was","we","were","what","when","where","which","while","who","whom","why","will","with","would","yet","you","your"]),e.Pipeline.registerFunction(e.stopWordFilter,"stopWordFilter");e.trimmer=function(t){return t.update(function(n){return n.replace(/^\W+/,"").replace(/\W+$/,"")})},e.Pipeline.registerFunction(e.trimmer,"trimmer");e.TokenSet=function(){this.final=!1,this.edges={},this.id=e.TokenSet._nextId,e.TokenSet._nextId+=1},e.TokenSet._nextId=1,e.TokenSet.fromArray=function(t){for(var n=new e.TokenSet.Builder,i=0,r=t.length;i<r;i++)n.insert(t[i]);return n.finish(),n.root},e.TokenSet.fromClause=function(t){return"editDistance"in t?e.TokenSet.fromFuzzyString(t.term,t.editDistance):e.TokenSet.fromString(t.term)},e.TokenSet.fromFuzzyString=function(t,n){for(var i=new e.TokenSet,r=[{node:i,editsRemaining:n,str:t}];r.length;){var s=r.pop();if(s.str.length>0){var o=s.str.charAt(0),a;o in s.node.edges?a=s.node.edges[o]:(a=new e.TokenSet,s.node.edges[o]=a),s.str.length==1&&(a.final=!0),r.push({node:a,editsRemaining:s.editsRemaining,str:s.str.slice(1)})}if(s.editsRemaining!=0){if("*"in s.node.edges)var l=s.node.edges["*"];else{var l=new e.TokenSet;s.node.edges["*"]=l}if(s.str.length==0&&(l.final=!0),r.push({node:l,editsRemaining:s.editsRemaining-1,str:s.str}),s.str.length>1&&r.push({node:s.node,editsRemaining:s.editsRemaining-1,str:s.str.slice(1)}),s.str.length==1&&(s.node.final=!0),s.str.length>=1){if("*"in s.node.edges)var u=s.node.edges["*"];else{var u=new e.TokenSet;s.node.edges["*"]=u}s.str.length==1&&(u.final=!0),r.push({node:u,editsRemaining:s.editsRemaining-1,str:s.str.slice(1)})}if(s.str.length>1){var f=s.str.charAt(0),y=s.str.charAt(1),g;y in s.node.edges?g=s.node.edges[y]:(g=new e.TokenSet,s.node.edges[y]=g),s.str.length==1&&(g.final=!0),r.push({node:g,editsRemaining:s.editsRemaining-1,str:f+s.str.slice(2)})}}}return i},e.TokenSet.fromString=function(t){for(var n=new e.TokenSet,i=n,r=0,s=t.length;r<s;r++){var o=t[r],a=r==s-1;if(o=="*")n.edges[o]=n,n.final=a;else{var l=new e.TokenSet;l.final=a,n.edges[o]=l,n=l}}return i},e.TokenSet.prototype.toArray=function(){for(var t=[],n=[{prefix:"",node:this}];n.length;){var i=n.pop(),r=Object.keys(i.node.edges),s=r.length;i.node.final&&(i.prefix.charAt(0),t.push(i.prefix));for(var o=0;o<s;o++){var a=r[o];n.push({prefix:i.prefix.concat(a),node:i.node.edges[a]})}}return t},e.TokenSet.prototype.toString=function(){if(this._str)return this._str;for(var t=this.final?"1":"0",n=Object.keys(this.edges).sort(),i=n.length,r=0;r<i;r++){var s=n[r],o=this.edges[s];t=t+s+o.id}return t},e.TokenSet.prototype.intersect=function(t){for(var n=new e.TokenSet,i=void 0,r=[{qNode:t,output:n,node:this}];r.length;){i=r.pop();for(var s=Object.keys(i.qNode.edges),o=s.length,a=Object.keys(i.node.edges),l=a.length,u=0;u<o;u++)for(var f=s[u],y=0;y<l;y++){var g=a[y];if(g==f||f=="*"){var L=i.node.edges[g],b=i.qNode.edges[f],T=L.final&&b.final,m=void 0;g in i.output.edges?(m=i.output.edges[g],m.final=m.final||T):(m=new e.TokenSet,m.final=T,i.output.edges[g]=m),r.push({qNode:b,output:m,node:L})}}}return n},e.TokenSet.Builder=function(){this.previousWord="",this.root=new e.TokenSet,this.uncheckedNodes=[],this.minimizedNodes={}},e.TokenSet.Builder.prototype.insert=function(t){var n,i=0;if(t<this.previousWord)throw new Error("Out of order word insertion");for(var r=0;r<t.length&&r<this.previousWord.length&&t[r]==this.previousWord[r];r++)i++;this.minimize(i),this.uncheckedNodes.length==0?n=this.root:n=this.uncheckedNodes[this.uncheckedNodes.length-1].child;for(var r=i;r<t.length;r++){var s=new e.TokenSet,o=t[r];n.edges[o]=s,this.uncheckedNodes.push({parent:n,char:o,child:s}),n=s}n.final=!0,this.previousWord=t},e.TokenSet.Builder.prototype.finish=function(){this.minimize(0)},e.TokenSet.Builder.prototype.minimize=function(t){for(var n=this.uncheckedNodes.length-1;n>=t;n--){var i=this.uncheckedNodes[n],r=i.child.toString();r in this.minimizedNodes?i.parent.edges[i.char]=this.minimizedNodes[r]:(i.child._str=r,this.minimizedNodes[r]=i.child),this.uncheckedNodes.pop()}};e.Index=function(t){this.invertedIndex=t.invertedIndex,this.fieldVectors=t.fieldVectors,this.tokenSet=t.tokenSet,this.fields=t.fields,this.pipeline=t.pipeline},e.Index.prototype.search=function(t){return this.query(function(n){var i=new e.QueryParser(t,n);i.parse()})},e.Index.prototype.query=function(t){for(var n=new e.Query(this.fields),i=Object.create(null),r=Object.create(null),s=Object.create(null),o=Object.create(null),a=Object.create(null),l=0;l<this.fields.length;l++)r[this.fields[l]]=new e.Vector;t.call(n,n);for(var l=0;l<n.clauses.length;l++){var u=n.clauses[l],f=null,y=e.Set.empty;u.usePipeline?f=this.pipeline.runString(u.term,{fields:u.fields}):f=[u.term];for(var g=0;g<f.length;g++){var L=f[g];u.term=L;var b=e.TokenSet.fromClause(u),T=this.tokenSet.intersect(b).toArray();if(T.length===0&&u.presence===e.Query.presence.REQUIRED){for(var m=0;m<u.fields.length;m++){var h=u.fields[m];o[h]=e.Set.empty}break}for(var O=0;O<T.length;O++)for(var w=T[O],Q=this.invertedIndex[w],F=Q._index,m=0;m<u.fields.length;m++){var h=u.fields[m],S=Q[h],C=Object.keys(S),D=w+"/"+h,V=new e.Set(C);if(u.presence==e.Query.presence.REQUIRED&&(y=y.union(V),o[h]===void 0&&(o[h]=e.Set.complete)),u.presence==e.Query.presence.PROHIBITED){a[h]===void 0&&(a[h]=e.Set.empty),a[h]=a[h].union(V);continue}if(r[h].upsert(F,u.boost,function(ti,ni){return ti+ni}),!s[D]){for(var ae=0;ae<C.length;ae++){var fe=C[ae],j=new e.FieldRef(fe,h),pe=S[fe],he;(he=i[j])===void 0?i[j]=new e.MatchData(w,h,pe):he.add(w,h,pe)}s[D]=!0}}}if(u.presence===e.Query.presence.REQUIRED)for(var m=0;m<u.fields.length;m++){var h=u.fields[m];o[h]=o[h].intersect(y)}}for(var ce=e.Set.complete,Z=e.Set.empty,l=0;l<this.fields.length;l++){var h=this.fields[l];o[h]&&(ce=ce.intersect(o[h])),a[h]&&(Z=Z.union(a[h]))}var d=Object.keys(i),v=[],U=Object.create(null);if(n.isNegated()){d=Object.keys(this.fieldVectors);for(var l=0;l<d.length;l++){var j=d[l],R=e.FieldRef.fromString(j);i[j]=new e.MatchData}}for(var l=0;l<d.length;l++){var R=e.FieldRef.fromString(d[l]),p=R.docRef;if(ce.contains(p)&&!Z.contains(p)){var x=this.fieldVectors[R],W=r[R.fieldName].similarity(x),ee;if((ee=U[p])!==void 0)ee.score+=W,ee.matchData.combine(i[R]);else{var E={ref:p,score:W,matchData:i[R]};U[p]=E,v.push(E)}}}return v.sort(function(Zn,ei){return ei.score-Zn.score})},e.Index.prototype.toJSON=function(){var t=Object.keys(this.invertedIndex).sort().map(function(i){return[i,this.invertedIndex[i]]},this),n=Object.keys(this.fieldVectors).map(function(i){return[i,this.fieldVectors[i].toJSON()]},this);return{version:e.version,fields:this.fields,fieldVectors:n,invertedIndex:t,pipeline:this.pipeline.toJSON()}},e.Index.load=function(t){var n={},i={},r=t.fieldVectors,s=Object.create(null),o=t.invertedIndex,a=new e.TokenSet.Builder,l=e.Pipeline.load(t.pipeline);t.version!=e.version&&e.utils.warn("Version mismatch when loading serialised index. Current version of lunr '"+e.version+"' does not match serialized index '"+t.version+"'");for(var u=0;u<r.length;u++){var f=r[u],y=f[0],g=f[1];i[y]=new e.Vector(g)}for(var u=0;u<o.length;u++){var f=o[u],L=f[0],b=f[1];a.insert(L),s[L]=b}return a.finish(),n.fields=t.fields,n.fieldVectors=i,n.invertedIndex=s,n.tokenSet=a.root,n.pipeline=l,new e.Index(n)};e.Builder=function(){this._ref="id",this._fields=Object.create(null),this._documents=Object.create(null),this.invertedIndex=Object.create(null),this.fieldTermFrequencies={},this.fieldLengths={},this.tokenizer=e.tokenizer,this.pipeline=new e.Pipeline,this.searchPipeline=new e.Pipeline,this.documentCount=0,this._b=.75,this._k1=1.2,this.termIndex=0,this.metadataWhitelist=[]},e.Builder.prototype.ref=function(t){this._ref=t},e.Builder.prototype.field=function(t,n){if(/\//.test(t))throw new RangeError("Field '"+t+"' contains illegal character '/'");this._fields[t]=n||{}},e.Builder.prototype.b=function(t){t<0?this._b=0:t>1?this._b=1:this._b=t},e.Builder.prototype.k1=function(t){this._k1=t},e.Builder.prototype.add=function(t,n){var i=t[this._ref],r=Object.keys(this._fields);this._documents[i]=n||{},this.documentCount+=1;for(var s=0;s<r.length;s++){var o=r[s],a=this._fields[o].extractor,l=a?a(t):t[o],u=this.tokenizer(l,{fields:[o]}),f=this.pipeline.run(u),y=new e.FieldRef(i,o),g=Object.create(null);this.fieldTermFrequencies[y]=g,this.fieldLengths[y]=0,this.fieldLengths[y]+=f.length;for(var L=0;L<f.length;L++){var b=f[L];if(g[b]==null&&(g[b]=0),g[b]+=1,this.invertedIndex[b]==null){var T=Object.create(null);T._index=this.termIndex,this.termIndex+=1;for(var m=0;m<r.length;m++)T[r[m]]=Object.create(null);this.invertedIndex[b]=T}this.invertedIndex[b][o][i]==null&&(this.invertedIndex[b][o][i]=Object.create(null));for(var h=0;h<this.metadataWhitelist.length;h++){var O=this.metadataWhitelist[h],w=b.metadata[O];this.invertedIndex[b][o][i][O]==null&&(this.invertedIndex[b][o][i][O]=[]),this.invertedIndex[b][o][i][O].push(w)}}}},e.Builder.prototype.calculateAverageFieldLengths=function(){for(var t=Object.keys(this.fieldLengths),n=t.length,i={},r={},s=0;s<n;s++){var o=e.FieldRef.fromString(t[s]),a=o.fieldName;r[a]||(r[a]=0),r[a]+=1,i[a]||(i[a]=0),i[a]+=this.fieldLengths[o]}for(var l=Object.keys(this._fields),s=0;s<l.length;s++){var u=l[s];i[u]=i[u]/r[u]}this.averageFieldLength=i},e.Builder.prototype.createFieldVectors=function(){for(var t={},n=Object.keys(this.fieldTermFrequencies),i=n.length,r=Object.create(null),s=0;s<i;s++){for(var o=e.FieldRef.fromString(n[s]),a=o.fieldName,l=this.fieldLengths[o],u=new e.Vector,f=this.fieldTermFrequencies[o],y=Object.keys(f),g=y.length,L=this._fields[a].boost||1,b=this._documents[o.docRef].boost||1,T=0;T<g;T++){var m=y[T],h=f[m],O=this.invertedIndex[m]._index,w,Q,F;r[m]===void 0?(w=e.idf(this.invertedIndex[m],this.documentCount),r[m]=w):w=r[m],Q=w*((this._k1+1)*h)/(this._k1*(1-this._b+this._b*(l/this.averageFieldLength[a]))+h),Q*=L,Q*=b,F=Math.round(Q*1e3)/1e3,u.insert(O,F)}t[o]=u}this.fieldVectors=t},e.Builder.prototype.createTokenSet=function(){this.tokenSet=e.TokenSet.fromArray(Object.keys(this.invertedIndex).sort())},e.Builder.prototype.build=function(){return this.calculateAverageFieldLengths(),this.createFieldVectors(),this.createTokenSet(),new e.Index({invertedIndex:this.invertedIndex,fieldVectors:this.fieldVectors,tokenSet:this.tokenSet,fields:Object.keys(this._fields),pipeline:this.searchPipeline})},e.Builder.prototype.use=function(t){var n=Array.prototype.slice.call(arguments,1);n.unshift(this),t.apply(this,n)},e.MatchData=function(t,n,i){for(var r=Object.create(null),s=Object.keys(i||{}),o=0;o<s.length;o++){var a=s[o];r[a]=i[a].slice()}this.metadata=Object.create(null),t!==void 0&&(this.metadata[t]=Object.create(null),this.metadata[t][n]=r)},e.MatchData.prototype.combine=function(t){for(var n=Object.keys(t.metadata),i=0;i<n.length;i++){var r=n[i],s=Object.keys(t.metadata[r]);this.metadata[r]==null&&(this.metadata[r]=Object.create(null));for(var o=0;o<s.length;o++){var a=s[o],l=Object.keys(t.metadata[r][a]);this.metadata[r][a]==null&&(this.metadata[r][a]=Object.create(null));for(var u=0;u<l.length;u++){var f=l[u];this.metadata[r][a][f]==null?this.metadata[r][a][f]=t.metadata[r][a][f]:this.metadata[r][a][f]=this.metadata[r][a][f].concat(t.metadata[r][a][f])}}}},e.MatchData.prototype.add=function(t,n,i){if(!(t in this.metadata)){this.metadata[t]=Object.create(null),this.metadata[t][n]=i;return}if(!(n in this.metadata[t])){this.metadata[t][n]=i;return}for(var r=Object.keys(i),s=0;s<r.length;s++){var o=r[s];o in this.metadata[t][n]?this.metadata[t][n][o]=this.metadata[t][n][o].concat(i[o]):this.metadata[t][n][o]=i[o]}},e.Query=function(t){this.clauses=[],this.allFields=t},e.Query.wildcard=new String("*"),e.Query.wildcard.NONE=0,e.Query.wildcard.LEADING=1,e.Query.wildcard.TRAILING=2,e.Query.presence={OPTIONAL:1,REQUIRED:2,PROHIBITED:3},e.Query.prototype.clause=function(t){return"fields"in t||(t.fields=this.allFields),"boost"in t||(t.boost=1),"usePipeline"in t||(t.usePipeline=!0),"wildcard"in t||(t.wildcard=e.Query.wildcard.NONE),t.wildcard&e.Query.wildcard.LEADING&&t.term.charAt(0)!=e.Query.wildcard&&(t.term="*"+t.term),t.wildcard&e.Query.wildcard.TRAILING&&t.term.slice(-1)!=e.Query.wildcard&&(t.term=""+t.term+"*"),"presence"in t||(t.presence=e.Query.presence.OPTIONAL),this.clauses.push(t),this},e.Query.prototype.isNegated=function(){for(var t=0;t<this.clauses.length;t++)if(this.clauses[t].presence!=e.Query.presence.PROHIBITED)return!1;return!0},e.Query.prototype.term=function(t,n){if(Array.isArray(t))return t.forEach(function(r){this.term(r,e.utils.clone(n))},this),this;var i=n||{};return i.term=t.toString(),this.clause(i),this},e.QueryParseError=function(t,n,i){this.name="QueryParseError",this.message=t,this.start=n,this.end=i},e.QueryParseError.prototype=new Error,e.QueryLexer=function(t){this.lexemes=[],this.str=t,this.length=t.length,this.pos=0,this.start=0,this.escapeCharPositions=[]},e.QueryLexer.prototype.run=function(){for(var t=e.QueryLexer.lexText;t;)t=t(this)},e.QueryLexer.prototype.sliceString=function(){for(var t=[],n=this.start,i=this.pos,r=0;r<this.escapeCharPositions.length;r++)i=this.escapeCharPositions[r],t.push(this.str.slice(n,i)),n=i+1;return 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