Comparisons Involving Data Items with USAGE PROCEDURE-POINTER (Relation
Condition)
Two items whose USAGE is PROCEDURE-POINTER can be compared.
General Format
Syntax Rules
Identifier-1 and identifier-2 refer to items with USAGE IS PROCEDURE-POINTER.
Only one operand in the comparison can be the figurative constant NULL.
General Rules
The operands are equal if the two addresses are the same, otherwise they
are unequal.
This type of relation condition is allowed in IF, PERFORM, EVALUATE and SEARCH
(Format 1) statements. It is not allowed in SEARCH (Format 2) statements (SEARCH
ALL) because no meaningful ordering can be applied to pointer data items.