CWG2922 constexpr placement-new is too permissive

Author: burblebee

source/expressions.tex

@@ -7712,9 +7712,9 @@
 \begin{itemize}
 \item
 the placement argument to the \grammarterm{new-expression} points to
-an object that is pointer-interconvertible with an object of type \tcode{T} or,
-if T is an array type,
-with the first element of an object of type \tcode{T}, and
+an object whose type is similar to \tcode{T}\iref{conv.qual} or,
+if \tcode{T} is an array type,
+to the first element of an object of a type similar to \tcode{T}, and
 \item
 the placement argument points to storage
 whose duration began within the evaluation of $E$;