32.20. $classDscrFor

$classDscrFor returns the CLASS descriptor for c. This PROCEDURE returns the same POINTER as $dscrPtr(new(c)), but no new record of the CLASS needs to be allocated.

The implementation of $classDscrFor is fairly efficient, but a call to it does involve a small amount of computation. If a given CLASS descriptor POINTER is to be used often (e.g., in a tight loop), it is a bit more efficient to do p := $classDscrFor(c) and reuse p than to call $classDscrFor repeatedly.

The CLASS form of cvp (see Section 32.93) is equivalent to $classDscrFor; for any CLASS c, cvp(c) = $classDscrFor(c) is true.