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Class oplan.util.lisp.Null
java.lang.Object
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+----oplan.util.lisp.LispObject
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+----oplan.util.lisp.List
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+----oplan.util.lisp.Null
- public final class Null
- extends List
The class of Lisp.NIL, and of nothing else.
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enumeration
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Null()
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append(List)
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car()
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cdr()
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elementAt(int)
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elements()
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equal(List)
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find(Object)
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isNull()
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length()
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toString()
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enumeration
private static NullEnumeration enumeration
Null
Null()
isNull
public boolean isNull()
- Overrides:
- isNull in class List
car
public Object car()
- Overrides:
- car in class List
cdr
public List cdr()
- Overrides:
- cdr in class List
length
public int length()
- Overrides:
- length in class List
elementAt
public Object elementAt(int i)
- Overrides:
- elementAt in class List
elements
public Enumeration elements()
- Overrides:
- elements in class List
equal
public boolean equal(List l)
- Overrides:
- equal in class List
find
public boolean find(Object a)
- Overrides:
- find in class List
append
public List append(List tail)
- Overrides:
- append in class List
toString
public String toString()
- Overrides:
- toString in class Object
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