Translating null

The keyword null can appear in various contexts where it must be promoted to a multiarray-valued expression. Specifically these contexts are:

• on the right-hand-side of an assignment expression (section A.4.10), where the variable on the left-hand-side is a multiarray variable,
• as one operand of a reference equality test (section A.4.23), where the other operand is a multiarray value,
• as the operand of a cast (section A.4.21) to a multiarray type, or
• as the operand of an instanceof test (section A.4.22) for a multiarray type^A.7.
• as the argument of a method or constructor, where a multiarray parameter is expected.
• as the expression in a return statement, where the method has multiarray return type.

In these contexts, the (trivial) translation functions are given in Figure A.44.