Late-CH01 11.3.5 [class.copy.assgn] p2,5 Defaulted copy and move assignment should have ref-qualifier #375
Description
The defaulted copy and move assignment operator are unqualified and as such callable on an rvalue ( 12.3.1 over.match.funcs p5.1 ) however they return an lvalue reference to *this.
Proposed change:
Do tell the truth and make the compiler provided assignment operators ref-qualified:
X& X::operator=(const X&) & X& X::operator=(X&) & X& X::operator=(X&&) &
This defect should be applied retroactively to all revisions from C++11 on.
Alternatively the rule 12.3.1. p5.1 could be made exempt of assignment operators