java_cup
Class symbol_set

java.lang.Object
  java_cup.symbol_set

public class symbol_set
extends java.lang.Object

This class represents a set of symbols and provides a series of set operations to manipulate them.

Version:

last updated: 11/25/95

Author:

Scott Hudson

See Also:

symbol

Constructor Summary

symbol_set()
Constructor for an empty set.

symbol_set(symbol_set other)
Constructor for cloning from another set.

Method Summary

boolean	add(symbol_set other) Add (union) in a complete set.
boolean	add(symbol sym) Add a single symbol to the set.
java.util.Enumeration	all() Access to all elements of the set.
boolean	contains(symbol sym) Determine if the set contains a particular symbol.
boolean	equals(java.lang.Object other) Generic equality comparison.
boolean	equals(symbol_set other) Equality comparison.
int	hashCode() Compute a hash code.
boolean	is_subset_of(symbol_set other) Determine if this set is an (improper) subset of another.
boolean	is_superset_of(symbol_set other) Determine if this set is an (improper) superset of another.
void	remove(symbol_set other) Remove (set subtract) a complete set.
void	remove(symbol sym) Remove a single symbol if it is in the set.
int	size() size of the set
java.lang.String	toString() Convert to a string.

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

symbol_set

public symbol_set()

Constructor for an empty set.

symbol_set

public symbol_set(symbol_set other)
           throws internal_error

Constructor for cloning from another set.

Parameters:

other - the set we are cloning from.

Throws:

internal_error

Method Detail

all

public java.util.Enumeration all()

Access to all elements of the set.

size

public int size()

size of the set

contains

public boolean contains(symbol sym)

Determine if the set contains a particular symbol.

Parameters:

sym - the symbol we are looking for.

is_subset_of

public boolean is_subset_of(symbol_set other)
                     throws internal_error

Determine if this set is an (improper) subset of another.

Parameters:

other - the set we are testing against.

Throws:

internal_error

is_superset_of

public boolean is_superset_of(symbol_set other)
                       throws internal_error

Determine if this set is an (improper) superset of another.

Parameters:

other - the set we are are testing against.

Throws:

internal_error

add

public boolean add(symbol sym)
            throws internal_error

Add a single symbol to the set.

Parameters:

sym - the symbol we are adding.

Returns:

true if this changes the set.

Throws:

internal_error

remove

public void remove(symbol sym)
            throws internal_error

Remove a single symbol if it is in the set.

Parameters:

sym - the symbol we are removing.

Throws:

internal_error

add

public boolean add(symbol_set other)
            throws internal_error

Add (union) in a complete set.

Parameters:

other - the set we are adding in.

Returns:

true if this changes the set.

Throws:

internal_error

remove

public void remove(symbol_set other)
            throws internal_error

Remove (set subtract) a complete set.

Parameters:

other - the set we are removing.

Throws:

internal_error

equals

public boolean equals(symbol_set other)

Equality comparison.

equals

public boolean equals(java.lang.Object other)

Generic equality comparison.

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Compute a hash code.

Overrides:

hashCode in class java.lang.Object

toString

public java.lang.String toString()

Convert to a string.

Overrides:

toString in class java.lang.Object