tools: dry utility function in tools/doc/json.js

Also, move a declaration of unrelated variable
closer to its only context.
PR-URL: #19692
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>

Author: vsemozhetbyt

tools/doc/json.js

@@ -323,6 +323,8 @@ function processList(section) {
 deletesection.list;
 }
 
+constparamExpr=/\((.*)\);?$/;
+
 // textRaw = "someobject.someMethod(a[, b=100][, c])"
 functionparseSignature(text,sig){
 varparams=text.match(paramExpr);
@@ -556,42 +558,23 @@ function deepCopy_(src) {
 
 
 // These parse out the contents of an H# tag.
-consteventExpr=/^Event(?::|\s)+['"]?([^"']+).*$/i;
-constclassExpr=/^Class:\s*([^]+).*$/i;
-constpropExpr=/^[^.]+\.([^.()]+)\s*$/;
-constbraceExpr=/^[^.[]+(\[[^\]]+\])\s*$/;
-constclassMethExpr=/^class\s*method\s*:?[^.]+\.([^.()]+)\([^)]*\)\s*$/i;
-constmethExpr=/^(?:[^.]+\.)?([^.()]+)\([^)]*\)\s*$/;
-constnewExpr=/^new([A-Z][a-zA-Z]+)\([^)]*\)\s*$/;
-varparamExpr=/\((.*)\);?$/;
-
-functionnewSection(tok){
-constsection={};
+constheadingExpressions=[
+{type: 'event',re: /^Event(?::|\s)+['"]?([^"']+).*$/i},
+{type: 'class',re: /^Class:\s*([^]+).*$/i},
+{type: 'property',re: /^[^.[]+(\[[^\]]+\])\s*$/},
+{type: 'property',re: /^[^.]+\.([^.()]+)\s*$/},
+{type: 'classMethod',re: /^class\s*method\s*:?[^.]+\.([^.()]+)\([^)]*\)\s*$/i},
+{type: 'method',re: /^(?:[^.]+\.)?([^.()]+)\([^)]*\)\s*$/},
+{type: 'ctor',re: /^new([A-Z][a-zA-Z]+)\([^)]*\)\s*$/},
+];
+
+functionnewSection({ text }){
 // Infer the type from the text.
-consttext=section.textRaw=tok.text;
-if(text.match(eventExpr)){
-section.type='event';
-section.name=text.replace(eventExpr,'$1');
-}elseif(text.match(classExpr)){
-section.type='class';
-section.name=text.replace(classExpr,'$1');
-}elseif(text.match(braceExpr)){
-section.type='property';
-section.name=text.replace(braceExpr,'$1');
-}elseif(text.match(propExpr)){
-section.type='property';
-section.name=text.replace(propExpr,'$1');
-}elseif(text.match(classMethExpr)){
-section.type='classMethod';
-section.name=text.replace(classMethExpr,'$1');
-}elseif(text.match(methExpr)){
-section.type='method';
-section.name=text.replace(methExpr,'$1');
-}elseif(text.match(newExpr)){
-section.type='ctor';
-section.name=text.replace(newExpr,'$1');
-}else{
-section.name=text;
+for(const{ type, re }ofheadingExpressions){
+const[,name]=text.match(re)||[];
+if(name){
+return{textRaw: text, type, name };
+}
 }
-returnsection;
+return{textRaw: text,name: text};
 }