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85 lines
2.8 KiB
Java
85 lines
2.8 KiB
Java
/*
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[The "BSD licence"]
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Copyright (c) 2005-2006 Terence Parr
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. The name of the author may not be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package org.antlr.misc;
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import org.antlr.tool.Grammar;
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import java.util.List;
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/** A generic set of ints that has an efficient implementation, BitSet,
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* which is a compressed bitset and is useful for ints that
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* are small, for example less than 500 or so, and w/o many ranges. For
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* ranges with large values like unicode char sets, this is not very efficient.
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* Consider using IntervalSet. Not all methods in IntervalSet are implemented.
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*
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* @see org.antlr.misc.BitSet
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* @see org.antlr.misc.IntervalSet
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*/
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public interface IntSet {
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/** Add an element to the set */
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void add(int el);
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/** Add all elements from incoming set to this set. Can limit
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* to set of its own type.
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*/
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void addAll(IntSet set);
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/** Return the intersection of this set with the argument, creating
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* a new set.
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*/
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IntSet and(IntSet a);
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IntSet complement(IntSet elements);
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IntSet or(IntSet a);
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IntSet subtract(IntSet a);
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/** Return the size of this set (not the underlying implementation's
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* allocated memory size, for example).
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*/
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int size();
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boolean isNil();
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boolean equals(Object obj);
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int getSingleElement();
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boolean member(int el);
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/** remove this element from this set */
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void remove(int el);
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List toList();
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String toString();
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String toString(Grammar g);
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}
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