org.antlr.misc

Interface IntSet

All Known Implementing Classes:

BitSet, IntervalSet

public interface IntSet

A generic set of ints that has an efficient implementation, BitSet, which is a compressed bitset and is useful for ints that are small, for example less than 500 or so, and w/o many ranges. For ranges with large values like unicode char sets, this is not very efficient. Consider using IntervalSet. Not all methods in IntervalSet are implemented.

See Also:

BitSet, IntervalSet

Method Summary

Methods

Modifier and Type	Method and Description
void	add(int el) Add an element to the set
void	addAll(IntSet set) Add all elements from incoming set to this set.
IntSet	and(IntSet a) Return the intersection of this set with the argument, creating a new set.
IntSet	complement(IntSet elements)
boolean	equals(Object obj)
int	getSingleElement()
boolean	isNil()
boolean	member(int el)
IntSet	or(IntSet a)
void	remove(int el) remove this element from this set
int	size() Return the size of this set (not the underlying implementation's allocated memory size, for example).
IntSet	subtract(IntSet a)
List<Integer>	toList()
String	toString()
String	toString(Grammar g)

Method Detail

add

void add(int el)

Add an element to the set

addAll

void addAll(IntSet set)

Add all elements from incoming set to this set. Can limit to set of its own type.

and

IntSet and(IntSet a)

Return the intersection of this set with the argument, creating a new set.

complement

IntSet complement(IntSet elements)

or

IntSet or(IntSet a)

subtract

IntSet subtract(IntSet a)

size

int size()

Return the size of this set (not the underlying implementation's allocated memory size, for example).

isNil

boolean isNil()

equals

boolean equals(Object obj)

Overrides:

equals in class Object

getSingleElement

int getSingleElement()

member

boolean member(int el)

remove

void remove(int el)

remove this element from this set

toList

List<Integer> toList()

toString

String toString()

Overrides:

toString in class Object

toString

String toString(Grammar g)