public class symbol_set
extends java.lang.Object
symbol
Modifier and Type | Field and Description |
---|---|
protected java.util.Hashtable |
_all
A hash table to hold the set.
|
Constructor and Description |
---|
symbol_set()
Constructor for an empty set.
|
symbol_set(symbol_set other)
Constructor for cloning from another set.
|
Modifier and Type | Method and Description |
---|---|
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.
|
protected void |
not_null(java.lang.Object obj)
Helper function to test for a null object and throw an exception
if one is found.
|
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.
|
protected java.util.Hashtable _all
public symbol_set()
public symbol_set(symbol_set other) throws internal_error
other
- the set we are cloning from.internal_error
public java.util.Enumeration all()
public int size()
protected void not_null(java.lang.Object obj) throws internal_error
obj
- the object we are testing.internal_error
public boolean contains(symbol sym)
sym
- the symbol we are looking for.public boolean is_subset_of(symbol_set other) throws internal_error
other
- the set we are testing against.internal_error
public boolean is_superset_of(symbol_set other) throws internal_error
other
- the set we are are testing against.internal_error
public boolean add(symbol sym) throws internal_error
sym
- the symbol we are adding.internal_error
public void remove(symbol sym) throws internal_error
sym
- the symbol we are removing.internal_error
public boolean add(symbol_set other) throws internal_error
other
- the set we are adding in.internal_error
public void remove(symbol_set other) throws internal_error
other
- the set we are removing.internal_error
public boolean equals(symbol_set other)
public boolean equals(java.lang.Object other)
equals
in class java.lang.Object
public int hashCode()
hashCode
in class java.lang.Object
public java.lang.String toString()
toString
in class java.lang.Object