To provide shells metrics rules 

iCode CNES tool evaluates the followings metrics SH.MET.LineOfCode, SH.MET.RatioComment, SH.MET.Nesting, SH.MET.ComplexitySimplified as rules at functions levels.

But CAT dont implemented these rules.

If these metrics were provided in the form of rules, this would have the advantage of allowing progress to be tracked with software releases.