Rcpp: Syntactic sugar for * produces unexpected results when dealing with NumericMatrix

Question

A recently asked question has lead me to believe the syntactic sugar for * by Rcpp does not work as intended. In the linked question, the user is t

Answer 1

This is an unfortunate consequence of a bad design decision, namely making Rcpp matrices derive from Rcpp vectors.

I'm likely to revert this decision in Rcpp implementations I now maintain: Rcpp11 and Rcpp98. I don't think anymore that there any benefit of having Matrix derive from Vector and it gets in the way of CRTP that is used at the end of this file.