org.w3c.tools.sexpr
Class Cons
java.lang.Object
|
+--org.w3c.tools.sexpr.Cons
- public class Cons
- extends java.lang.Object
- implements SExpr
Basic class for implementing linked lists a la Lisp.
Constructor Summary |
Cons(java.lang.Object left)
Initializes a Cons cell with a left subtree only. |
Cons(java.lang.Object left,
java.lang.Object right)
Initializes a Cons cell with the left and right "subtrees". |
Method Summary |
java.util.Enumeration |
elements()
|
java.lang.Object |
left()
Returns the left subtree (i.e. |
void |
printExpr(java.io.PrintStream stream)
Print a representation of the s-expression into the output stream. |
Cons |
rest()
Returns the tail of a cons cell if it is a list. |
java.lang.Object |
right()
Returns the right subtree (i.e. |
Methods inherited from class java.lang.Object |
clone,
equals,
finalize,
getClass,
hashCode,
notify,
notifyAll,
toString,
wait,
wait,
wait |
Cons
public Cons(java.lang.Object left,
java.lang.Object right)
- Initializes a Cons cell with the left and right "subtrees".
Cons
public Cons(java.lang.Object left)
- Initializes a Cons cell with a left subtree only.
Right subtree will be set to null.
left
public java.lang.Object left()
- Returns the left subtree (i.e. the head) of a cons cell.
right
public java.lang.Object right()
- Returns the right subtree (i.e. the tail) of a cons cell.
rest
public Cons rest()
throws SExprParserException
- Returns the tail of a cons cell if it is a list.
Signals an error otherwise (no dotted pairs allowed).
- Throws:
- SExprParserException - if the tail is not a Cons or null
elements
public java.util.Enumeration elements()
printExpr
public void printExpr(java.io.PrintStream stream)
- Description copied from interface: SExpr
- Print a representation of the s-expression into the output stream.
- Specified by:
- printExpr in interface SExpr