Why is the restrict keyword not part of C++?

Question

The title says it all. I am curious why is the restrict keyword not part of C++ ? I don\'t know much about C++, and I\'m still not able to find anything online that would gi

Answer 1

Not to detract from osgx's answer, but - there is a somewhat more up-to-date paper, N3998 by Finkel, Tong, Carrouth, Nelson Vandevoode and Wong, from May 2014:

Towards restrict-like aliasing semantics for C++

And an ever newer one from 2018:

[[assert: std::disjoint(A,nA, B,nB)]]: Contract assertions as an alternate spelling of ‘restrict’

(Thanks @MCCCS for pointing the last one out.)