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SFlexLexer Class Reference

#include <SFlexLexer.h>

Inherits yyFlexLexer.

Inheritance diagram for SFlexLexer:

[legend]List of all members.

Public Methods
	SFlexLexer (std::istream *in)
	~SFlexLexer ()
void	errMsg (const char *msg)
SFlexLexerToken	getToken ()
virtual int	lineno () const
void	ungetToken ()
bool	parseDouble ()
bool	parseLong ()
void	setErrorCaption (char *cap)
bool	readIdentifier (const char *ident)
bool	readToken (const SFlexLexerToken token)

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Detailed Description

SFlexLexer capsulates one lexical analyzer, which all modifiers can use to load() from file. The logical analyzer is defined by 'lexan.l', the input file for flex (Fast Lexical Analyzer Generator). There is only one instance of SFlexLexer for all modifiers SFooMod. With SFooMod::getLexer() the modifiers can get full access to the underlying lexer. The lexer returns tokens for parsing the content of a file.

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Constructor & Destructor Documentation

SFlexLexer::SFlexLexer (  std::istream *    in )

Constructor Parameters: in  input stream

SFlexLexer::~SFlexLexer (    )

Destructor

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Member Function Documentation

void SFlexLexer::errMsg (  const char *    msg )

Print an error message with the line number, where the error occured, and what the modifier had expected. Parameters: msg  error message

SFlexLexerToken SFlexLexer::getToken (    )

Get the next token in the input-stream Returns: next token

virtual int SFlexLexer::lineno (    )  const [inline, virtual]

Get the current line number in the input stream where the last token was read Returns: current line number

bool SFlexLexer::parseDouble (    )

Check if the next token can be interpreted as double value Returns: true when next token is ULONG, LONG or DOUBLE, false otherwise

bool SFlexLexer::parseLong (    )

Check if the next token can be interpreted as integer value Returns: true when next token is LONG or ULONG, false otherwise

bool SFlexLexer::readIdentifier (  const char *    ident )

Get next token and check if it is an IDENTIFIER and if the text of the token matches 'ident' Parameters: ident  text of the expected IDENTIFIER Returns: true if token is an IDENTIFIER and text matches, false otherwise (automatically errMsg() is called)

bool SFlexLexer::readToken (  const SFlexLexerToken    token )

Get next token and check if it matches the one you have expected Parameters: token  the expected token Returns: true if token matches the expected token, false otherwise (automatically errMsg() is called)

void SFlexLexer::setErrorCaption (  char *    cap )  [inline]

Set the text, that will be printed as caption at future errMsg()-calls Parameters: cap  caption text See also: method errMsg()

void SFlexLexer::ungetToken (    )  [inline]

Put the last token back into the input stream; use it if you expected another token and you want to try again; NOTE: calling ungetToken() serveral times will have the same effect as if you called it once, it will only put the current token back !

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

• tools/SFlexLexer.h
• tools/SFlexLexer.cpp

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