KDevelop API Documentation

TokenStreamHiddenTokenFilter Class Reference

This object filters a token stream coming from a lexer or another TokenStream so that only certain token channels get transmitted to the parser. More...

#include <TokenStreamHiddenTokenFilter.hpp>

Inheritance diagram for TokenStreamHiddenTokenFilter:

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Collaboration diagram for TokenStreamHiddenTokenFilter:

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List of all members.

Public Member Functions

 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.
BitSet getDiscardMask () const
RefToken getHiddenAfter (RefToken t)
 Return a ptr to the hidden token appearing immediately after token t in the input stream.
RefToken getHiddenBefore (RefToken t)
 Return a ptr to the hidden token appearing immediately before token t in the input stream.
BitSet getHideMask () const
RefToken getInitialHiddenToken ()
 Return the first hidden token if one appears before any monitored token.
void hide (int m)
void hide (const BitSet &mask)
RefToken nextToken ()
 Return the next monitored token.

Protected Member Functions

void consume ()
RefToken LA (int i)

Protected Attributes

BitSet hideMask
RefToken lastHiddenToken
 track tail of hidden list emanating from previous monitored token
RefToken firstHidden

Private Member Functions

void consumeFirst ()

Private Attributes

RefToken nextMonitoredToken

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.

Definition at line 25 of file TokenStreamHiddenTokenFilter.hpp.


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.

Definition at line 22 of file TokenStreamHiddenTokenFilter.cpp.


Member Function Documentation

void TokenStreamHiddenTokenFilter::consume  )  [protected]
 

Definition at line 27 of file TokenStreamHiddenTokenFilter.cpp.

References nextMonitoredToken, and TokenStream::nextToken().

Referenced by consumeFirst(), and nextToken().

void TokenStreamHiddenTokenFilter::consumeFirst  )  [private]
 

Definition at line 32 of file TokenStreamHiddenTokenFilter.cpp.

References consume(), firstHidden, RefCount< T >::get(), hideMask, LA(), lastHiddenToken, BitSet::member(), and RefToken.

Referenced by nextToken().

BitSet TokenStreamHiddenTokenFilter::getDiscardMask  )  const
 

Definition at line 58 of file TokenStreamHiddenTokenFilter.cpp.

RefToken TokenStreamHiddenTokenFilter::getHiddenAfter RefToken  t  ) 
 

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

Definition at line 66 of file TokenStreamHiddenTokenFilter.cpp.

References RefCount< T >::get(), and RefToken.

RefToken TokenStreamHiddenTokenFilter::getHiddenBefore RefToken  t  ) 
 

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

Definition at line 74 of file TokenStreamHiddenTokenFilter.cpp.

References RefCount< T >::get(), and RefToken.

BitSet TokenStreamHiddenTokenFilter::getHideMask  )  const
 

Definition at line 79 of file TokenStreamHiddenTokenFilter.cpp.

RefToken TokenStreamHiddenTokenFilter::getInitialHiddenToken  ) 
 

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

Definition at line 87 of file TokenStreamHiddenTokenFilter.cpp.

References RefToken.

void TokenStreamHiddenTokenFilter::hide const BitSet mask  ) 
 

Definition at line 97 of file TokenStreamHiddenTokenFilter.cpp.

References hideMask.

void TokenStreamHiddenTokenFilter::hide int  m  ) 
 

Definition at line 92 of file TokenStreamHiddenTokenFilter.cpp.

References BitSet::add(), and hideMask.

RefToken TokenStreamHiddenTokenFilter::LA int  i  )  [protected]
 

Definition at line 102 of file TokenStreamHiddenTokenFilter.cpp.

References RefToken.

Referenced by consumeFirst(), and nextToken().

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.

Definition at line 117 of file TokenStreamHiddenTokenFilter.cpp.

References consume(), consumeFirst(), RefCount< T >::get(), hideMask, LA(), lastHiddenToken, BitSet::member(), and RefToken.


Member Data Documentation

RefToken TokenStreamHiddenTokenFilter::firstHidden [protected]
 

Definition at line 39 of file TokenStreamHiddenTokenFilter.hpp.

Referenced by consumeFirst().

BitSet TokenStreamHiddenTokenFilter::hideMask [protected]
 

Definition at line 28 of file TokenStreamHiddenTokenFilter.hpp.

Referenced by consumeFirst(), hide(), and nextToken().

RefToken TokenStreamHiddenTokenFilter::lastHiddenToken [protected]
 

track tail of hidden list emanating from previous monitored token

Definition at line 37 of file TokenStreamHiddenTokenFilter.hpp.

Referenced by consumeFirst(), and nextToken().

RefToken TokenStreamHiddenTokenFilter::nextMonitoredToken [private]
 

Definition at line 31 of file TokenStreamHiddenTokenFilter.hpp.

Referenced by consume().


The documentation for this class was generated from the following files:
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Generated on Tue Feb 22 09:49:10 2005 by doxygen 1.3.9.1 written by Dimitri van Heesch, © 1997-2003