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tim |
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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: TokenStreamBasicFilter.cpp,v 1.1 2005-12-02 15:38:02 tim Exp $ |
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*/ |
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#include "antlr/TokenStreamBasicFilter.hpp" |
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#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE |
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namespace antlr { |
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#endif |
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/** This object is a TokenStream that passes through all |
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* tokens except for those that you tell it to discard. |
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* There is no buffering of the tokens. |
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*/ |
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TokenStreamBasicFilter::TokenStreamBasicFilter(TokenStream& input_) |
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: input(&input_) |
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{ |
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} |
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void TokenStreamBasicFilter::discard(int ttype) |
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{ |
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discardMask.add(ttype); |
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} |
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void TokenStreamBasicFilter::discard(const BitSet& mask) |
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{ |
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discardMask = mask; |
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} |
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RefToken TokenStreamBasicFilter::nextToken() |
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{ |
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RefToken tok = input->nextToken(); |
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while ( tok && discardMask.member(tok->getType()) ) { |
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tok = input->nextToken(); |
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} |
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return tok; |
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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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