Equal evaluates the comparison a == b || a == c || ...

Greater evaluates the comparison a > b.

GreaterEqual evaluates the comparison a >= b.

Indirect returns the item at the end of indirection, and a bool to indicate if it's nil.

Less evaluates the comparison a < b.

LessEqual evaluates the comparison <= b.

NotEqual evaluates the comparison a != b.

PrintableValue returns the, possibly indirected, interface value inside v that is best for a call to formatted printer.