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org.sablecc.sablecc
Class SymbolSet  

java.lang.Object
  org.sablecc.sablecc.SymbolSet

All Implemented Interfaces:

java.lang.Cloneable

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final class SymbolSet

extends java.lang.Object

implements java.lang.Cloneable

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Field Summary
private  boolean	empty
private  boolean	modified
private  IntSet	nonterminals
private  Symbol[]	symbols
private  IntSet	terminals

 

Constructor Summary
(package private)	SymbolSet()
private	SymbolSet(SymbolSet set)

 

Method Summary
(package private)  void	and(SymbolSet s)
(package private)  void	clearEmpty()
(package private)  void	clearNonterminal(int nonterminal)
(package private)  void	clearTerminal(int terminal)
java.lang.Object	clone()           This method may be called to create a new copy of the Object.
private  void	computeArray()
boolean	equals(java.lang.Object obj)           Determine whether this Object is semantically equal to another Object.
(package private)  boolean	getEmpty()
(package private)  boolean	getNonterminal(int nonterminal)
(package private)  Symbol[]	getSymbols()
(package private)  boolean	getTerminal(int terminal)
int	hashCode()           Get a value that represents this Object, as uniquely as possible within the confines of an int.
(package private)  void	or(SymbolSet s)
(package private)  void	setEmpty()
(package private)  void	setNonterminal(int nonterminal)
(package private)  void	setTerminal(int terminal)
java.lang.String	toString()           Convert this Object to a human-readable String.
(package private)  void	xor(SymbolSet s)

 

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

 

Field Detail

terminals

private final IntSet terminals

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nonterminals

private final IntSet nonterminals

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empty

private boolean empty

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modified

private boolean modified

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symbols

private Symbol[] symbols

Constructor Detail

SymbolSet

SymbolSet()

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SymbolSet

private SymbolSet(SymbolSet set)

Method Detail

computeArray

private void computeArray()

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setTerminal

void setTerminal(int terminal)

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clearTerminal

void clearTerminal(int terminal)

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getTerminal

boolean getTerminal(int terminal)

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setNonterminal

void setNonterminal(int nonterminal)

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clearNonterminal

void clearNonterminal(int nonterminal)

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getNonterminal

boolean getNonterminal(int nonterminal)

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setEmpty

void setEmpty()

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clearEmpty

void clearEmpty()

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getEmpty

boolean getEmpty()

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and

void and(SymbolSet s)

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or

void or(SymbolSet s)

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xor

void xor(SymbolSet s)

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hashCode

public int hashCode()

Description copied from class: java.lang.Object

Get a value that represents this Object, as uniquely as possible within the confines of an int.

There are some requirements on this method which subclasses must follow:

• Semantic equality implies identical hashcodes. In other words, if a.equals(b) is true, then a.hashCode() == b.hashCode() must be as well. However, the reverse is not necessarily true, and two objects may have the same hashcode without being equal.
• It must be consistent. Whichever value o.hashCode() returns on the first invocation must be the value returned on all later invocations as long as the object exists. Notice, however, that the result of hashCode may change between separate executions of a Virtual Machine, because it is not invoked on the same object.

Notice that since hashCode is used in java.util.Hashtable and other hashing classes, a poor implementation will degrade the performance of hashing (so don't blindly implement it as returning a constant!). Also, if calculating the hash is time-consuming, a class may consider caching the results.

The default implementation returns System.identityHashCode(this)

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equals

public boolean equals(java.lang.Object obj)

Description copied from class: java.lang.Object

Determine whether this Object is semantically equal to another Object.

There are some fairly strict requirements on this method which subclasses must follow:

• It must be transitive. If a.equals(b) and b.equals(c), then a.equals(c) must be true as well.
• It must be symmetric. a.equals(b) and b.equals(a) must have the same value.
• It must be reflexive. a.equals(a) must always be true.
• It must be consistent. Whichever value a.equals(b) returns on the first invocation must be the value returned on all later invocations.
• a.equals(null) must be false.
• It must be consistent with hashCode(). That is, a.equals(b) must imply a.hashCode() == b.hashCode(). The reverse is not true; two objects that are not equal may have the same hashcode, but that has the potential to harm hashing performance.

This is typically overridden to throw a java.lang.ClassCastException if the argument is not comparable to the class performing the comparison, but that is not a requirement. It is legal for a.equals(b) to be true even though a.getClass() != b.getClass(). Also, it is typical to never cause a java.lang.NullPointerException.

In general, the Collections API (java.util) use the equals method rather than the == operator to compare objects. However, java.util.IdentityHashMap is an exception to this rule, for its own good reasons.

The default implementation returns this == o.

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getSymbols

Symbol[] getSymbols()

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toString

public java.lang.String toString()

Description copied from class: java.lang.Object

Convert this Object to a human-readable String. There are no limits placed on how long this String should be or what it should contain. We suggest you make it as intuitive as possible to be able to place it into System.out.println() 55 and such.

It is typical, but not required, to ensure that this method never completes abruptly with a java.lang.RuntimeException.

This method will be called when performing string concatenation with this object. If the result is null, string concatenation will instead use "null".

The default implementation returns getClass().getName() + "@" + Integer.toHexString(hashCode()).

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clone

public java.lang.Object clone()

Description copied from class: java.lang.Object

This method may be called to create a new copy of the Object. The typical behavior is as follows:

• o == o.clone() is false
• o.getClass() == o.clone().getClass() is true
• o.equals(o) is true

However, these are not strict requirements, and may be violated if necessary. Of the three requirements, the last is the most commonly violated, particularly if the subclass does not override Object.equals(Object)>Object.equals(Object) 55 .

If the Object you call clone() on does not implement java.lang.Cloneable (which is a placeholder interface), then a CloneNotSupportedException is thrown. Notice that Object does not implement Cloneable; this method exists as a convenience for subclasses that do.

Object's implementation of clone allocates space for the new Object using the correct class, without calling any constructors, and then fills in all of the new field values with the old field values. Thus, it is a shallow copy. However, subclasses are permitted to make a deep copy.

All array types implement Cloneable, and override this method as follows (it should never fail):

 public Object clone()
 {
   try
     {
       super.clone();
     }
   catch (CloneNotSupportedException e)
     {
       throw new InternalError(e.getMessage());
     }
 }
 

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Overview  Package   Class  Use  Deprecated  Index
Home >> All >> org >> sablecc >> [ sablecc overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

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