abstract class $NIL < $IS_NIL

****	Inidicates that the subtype provides a nil value _ Designer's Note:The advantage of T over SAME is that in parametrized classes typecase e when $NILthen .... e.nil e.nil is now known to be of type T, whereas if it were SAME, you would need at least an extra level of typecase

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Ancestors

$IS_NIL

Descendants

$NUMBER{_}

FLT

INT

FLTD

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Public

Features

nil:SAME;

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