/usr/include/antlr/TokenStreamHiddenTokenFilter.hpp is in libantlr-dev 2.7.7+dfsg-6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 | #ifndef INC_TokenStreamHiddenTokenFilter_hpp__
#define INC_TokenStreamHiddenTokenFilter_hpp__
/* ANTLR Translator Generator
* Project led by Terence Parr at http://www.jGuru.com
* Software rights: http://www.antlr.org/license.html
*
* $Id: //depot/code/org.antlr/release/antlr-2.7.7/lib/cpp/antlr/TokenStreamHiddenTokenFilter.hpp#2 $
*/
#include <antlr/config.hpp>
#include <antlr/TokenStreamBasicFilter.hpp>
#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
namespace antlr {
#endif
/**This object filters a token stream coming from a lexer
* or another TokenStream so that only certain token channels
* get transmitted to the parser.
*
* Any of the channels can be filtered off as "hidden" channels whose
* tokens can be accessed from the parser.
*/
class ANTLR_API TokenStreamHiddenTokenFilter : public TokenStreamBasicFilter {
// protected BitSet discardMask;
protected:
BitSet hideMask;
private:
RefToken nextMonitoredToken;
protected:
/** track tail of hidden list emanating from previous
* monitored token
*/
RefToken lastHiddenToken;
RefToken firstHidden; // = null;
public:
TokenStreamHiddenTokenFilter(TokenStream& input);
protected:
void consume();
private:
void consumeFirst();
public:
BitSet getDiscardMask() const;
/** Return a ptr to the hidden token appearing immediately after
* token t in the input stream.
*/
RefToken getHiddenAfter(RefToken t);
/** Return a ptr to the hidden token appearing immediately before
* token t in the input stream.
*/
RefToken getHiddenBefore(RefToken t);
BitSet getHideMask() const;
/** Return the first hidden token if one appears
* before any monitored token.
*/
RefToken getInitialHiddenToken();
void hide(int m);
void hide(const BitSet& mask);
protected:
RefToken LA(int i);
public:
/** Return the next monitored token.
* Test the token following the monitored token.
* If following is another monitored token, save it
* for the next invocation of nextToken (like a single
* lookahead token) and return it then.
* If following is unmonitored, nondiscarded (hidden)
* channel token, add it to the monitored token.
*
* Note: EOF must be a monitored Token.
*/
RefToken nextToken();
};
#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
}
#endif
#endif //INC_TokenStreamHiddenTokenFilter_hpp__
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