JAULA::Lexan Class Reference
[JAULA: JSON lexical analysis]

Lexical Analysis implementation. More...

#include <jaula_lexan.h>

Public Member Functions
Lexan_Error const *	getErrorReport (void) const
	Retrieves details for the last error detected.
std::string const &	getTokenData (void) const
	Retrieves last token associated data.
	Lexan (std::istream &in_stream, bool comments_allowed=false)
	Constructor.
virtual void	LexerError (const char *detail)
	Error report.
virtual int	yylex ()
	Retrieves tokens from the input.
virtual	~Lexan ()
	Destructor.
Private Attributes
bool	commented
	Flag for extending language to accept # comments.
Lexan_Error *	pErrorReport
	Pointer to the last exception detected.
std::string	tokenData
	Container for the token associated data.

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Detailed Description

Lexical Analysis implementation.

This class implements the lexical analysis for JSON as specified by RFC 4627.

Author:

Kombo Morongo <morongo666@gmail.com>

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Constructor & Destructor Documentation

JAULA::Lexan::Lexan	(	std::istream &	in_stream,
		bool	comments_allowed = false
	)

Constructor.

Parameters:

	in_stream	stream for the input data to analyze
	comments_allowed	flag to extend basic format and allow for hash symbol '#' starting comments in input.

Description

Creates a lexical analysis instance for the specified input stream.

virtual JAULA::Lexan::~Lexan

(

)

[virtual]

Destructor.

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Member Function Documentation

Lexan_Error const* JAULA::Lexan::getErrorReport

(

void

)

const

Retrieves details for the last error detected.

Returns:

a pointer to an instance containing the details for the last error detected during the lexical analysis process or a null pointer in case no error have ocurred during the lexical analysis so far.

std::string const& JAULA::Lexan::getTokenData

(

void

)

const

Retrieves last token associated data.

Returns:

the data associated for the last token returned from yylex() in case there is such kind of data (token corresponds to a property name or a single value) or undefined otherwise.

virtual void JAULA::Lexan::LexerError

(

const char *

detail

)

[virtual]

Error report.

Parameters:

detail

Text for the error received

Description

This method is a callback used by the analysis routines to indicate an error condition.

Its current implementation consists of generating the exception instance to be retrieved by getErrorReport().

virtual int JAULA::Lexan::yylex

(

)

[virtual]

Retrieves tokens from the input.

Returns:

the code for a token read or 0 if the end of data has been reached.

Referenced by JAULA::Parser::parseStream().

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Field Documentation

bool JAULA::Lexan::commented [private]

Flag for extending language to accept # comments.

Lexan_Error* JAULA::Lexan::pErrorReport [private]

Pointer to the last exception detected.

std::string JAULA::Lexan::tokenData [private]

Container for the token associated data.

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

• jaula_lexan.h