abstract class $IS_NIL

****	Subtypes of this define "is_nil:BOOL". Typically used in typecases. Example: INT < $IS_NIL.

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Descendants

$NIL	$NUMBER{_}	FLT	INT
FLTD

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Public

Features

is_nil:BOOL;

****	Test whether a value is nil. This is necessary for types with unusual is_eq behavior (such as IEEE floats).

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