Four versions of the constructor are called by outside code:
*:ClassAd()
*:ClassAd(FILE*,char*,int&,int&,int&)
*:ClassAd(char *, char)
*:ClassAd(const ClassAd&)

The underlying {quote:AttrList} constructors are called in some locations.

The first version has a direct equivalent in new {quote:ClassAds}.

The second version has a compatibility version in new {quote:ClassAds}.

The third version has no equivalent in new {quote:ClassAds}. There are two callsites. One (ClassAdCollection::GetClassAdRank()) is trivial to rewrite to construct the ad differently. The other (HookPrepareJobClient::hookExited()) can be rewritten in a few hours.

The fourth version has a direct equivalent in new {quote:ClassAds}.

Developer time: 3-4 hours