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TokenStreamHiddenTokenFilter Class Reference

#include <TokenStreamHiddenTokenFilter.hpp>

Inheritance diagram for TokenStreamHiddenTokenFilter:

List of all members.

Public Methods
	TokenStreamHiddenTokenFilter (TokenStream &input)
BitSet	getDiscardMask () const
RefToken	getHiddenAfter (RefToken t)
RefToken	getHiddenBefore (RefToken t)
BitSet	getHideMask () const
RefToken	getInitialHiddenToken ()
void	hide (int m)
void	hide (const BitSet &mask)
RefToken	nextToken ()
Protected Methods
void	consume ()
RefToken	LA (int i)
Protected Attributes
BitSet	hideMask
RefToken	lastHiddenToken
RefToken	firstHidden

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Detailed Description

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.

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Constructor & Destructor Documentation

TokenStreamHiddenTokenFilter::TokenStreamHiddenTokenFilter (  TokenStream &    input )

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.

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Member Function Documentation

void TokenStreamHiddenTokenFilter::consume (    )  [protected]

BitSet TokenStreamHiddenTokenFilter::getDiscardMask (    )

RefToken TokenStreamHiddenTokenFilter::getHiddenAfter (  RefToken    t )

Return a ptr to the hidden token appearing immediately after token t in the input stream.

RefToken TokenStreamHiddenTokenFilter::getHiddenBefore (  RefToken    t )

Return a ptr to the hidden token appearing immediately before token t in the input stream.

BitSet TokenStreamHiddenTokenFilter::getHideMask (    )

RefToken TokenStreamHiddenTokenFilter::getInitialHiddenToken (    )

Return the first hidden token if one appears before any monitored token.

void TokenStreamHiddenTokenFilter::hide (  const BitSet &    mask )

void TokenStreamHiddenTokenFilter::hide (  int    m )

RefToken TokenStreamHiddenTokenFilter::LA (  int    i )  [protected]

RefToken TokenStreamHiddenTokenFilter::nextToken (    )  [virtual]

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. Reimplemented from TokenStreamBasicFilter.

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Member Data Documentation

RefToken TokenStreamHiddenTokenFilter::firstHidden [protected]

BitSet TokenStreamHiddenTokenFilter::hideMask [protected]

RefToken TokenStreamHiddenTokenFilter::lastHiddenToken [protected]

track tail of hidden list emanating from previous monitored token

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The documentation for this class was generated from the following files:

• TokenStreamHiddenTokenFilter.hpp
• TokenStreamHiddenTokenFilter.cpp

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