issue doxygen#12021 No matching class member found for overloaded functions with a templated parameter

Author: doxygen

src/util.cpp

@@ -1837,7 +1837,17 @@ static QCString extractCanonicalType(const Definition *d,const FileDef *fs,QCStr
     // foreach identifier in the type
   {
     //printf("     i=%d p=%d\n",i,p);
-    if (i>pp) canType += type.mid(pp,i-pp);
+    if (i>pp)
+    {
+      if (i-pp>=2 && type[i-2]==':' && type[i-1]==':') // skip over leading ::, see issue #12021
+      {
+        canType += type.mid(pp,i-pp-2);
+      }
+      else
+      {
+        canType += type.mid(pp,i-pp);
+      }
+    }
 
     QCString ct = getCanonicalTypeForIdentifier(d,fs,word,lang,&templSpec);
 
@@ -4225,7 +4235,7 @@ void addMembersToMemberGroup(MemberList *ml,
  */
 int extractClassNameFromType(const QCString &type,int &pos,QCString &name,QCString &templSpec,SrcLangExt lang)
 {
-  AUTO_TRACE("type='{}' name='{}' lang={}",type,name,lang);
+  AUTO_TRACE("type='{}' pos={} name='{}' lang={}",type,pos,name,lang);
   static const reg::Ex re_norm(R"(\a[\w:]*)");
   static const reg::Ex re_fortran(R"(\a[\w:()=]*)");
   const reg::Ex *re = &re_norm;