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#ifndef INC_BitSet_hpp__ |
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#define INC_BitSet_hpp__ |
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|
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/* ANTLR Translator Generator |
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* Project led by Terence Parr at http://www.jGuru.com |
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* Software rights: http://www.antlr.org/license.html |
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* |
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* $Id$ |
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*/ |
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|
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#include <antlr/config.hpp> |
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#include <vector> |
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#include <stdexcept> |
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|
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#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE |
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namespace antlr { |
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#endif |
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|
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/** A BitSet to replace java.util.BitSet. |
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* Primary differences are that most set operators return new sets |
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* as opposed to oring and anding "in place". Further, a number of |
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* operations were added. I cannot contain a BitSet because there |
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* is no way to access the internal bits (which I need for speed) |
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* and, because it is final, I cannot subclass to add functionality. |
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* Consider defining set degree. Without access to the bits, I must |
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* call a method n times to test the ith bit...ack! |
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* |
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* Also seems like or() from util is wrong when size of incoming set is bigger |
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* than this.length. |
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* |
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* This is a C++ version of the Java class described above, with only |
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* a handful of the methods implemented, because we don't need the |
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* others at runtime. It's really just a wrapper around vector<bool>, |
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* which should probably be changed to a wrapper around bitset, once |
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* bitset is more widely available. |
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* |
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* @author Terence Parr, MageLang Institute |
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* @author <br><a href="mailto:pete@yamuna.demon.co.uk">Pete Wells</a> |
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*/ |
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class ANTLR_API BitSet { |
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private: |
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ANTLR_USE_NAMESPACE(std)vector<bool> storage; |
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|
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public: |
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BitSet( unsigned int nbits=64 ); |
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BitSet( const unsigned long* bits_, unsigned int nlongs); |
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~BitSet(); |
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|
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void add( unsigned int el ); |
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|
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bool member( unsigned int el ) const; |
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|
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ANTLR_USE_NAMESPACE(std)vector<unsigned int> toArray() const; |
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}; |
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|
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#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE |
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} |
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#endif |
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|
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#endif //INC_BitSet_hpp__ |
