abstract class $IS_NIL

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

---

Descendants

$NIL	I_INTERVAL	$NFE{_}	$NUMBER{_}
INT	$REAL_NUMBER{_}	FLTD	FLT
$CPX_NUMBER{_,_}	CPX	CPXD	CPX{_}
$F_NUMBER{_}	F_INTEGER	F_REAL	F_COMPLEX
F_DOUBLE_COMPLEX	F_DOUBLE

---

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).

---

The Sather Home Page

---