LpParser::Driver Class Reference

#include <LpDriver.h>

Public Member Functions
	Driver (LpDataBase &db)
bool	parse_stream (std::istream &in, const string &sname="stream input")
bool	parse_string (const string &input, const string &sname="string stream")
bool	parse_file (const string &filename)
void	error (const class location &l, const string &m)
void	error (const string &m)

Public Attributes
bool	trace_scanning
	enable debug output in the flex scanner
bool	trace_parsing
	enable debug output in the bison parser
string	streamname
	stream name (file or input stream) used for error messages.
class Scanner *	lexer
LpDataBase &	m_db

Detailed Description

The Driver class brings together all components. It creates an instance of the Parser and Scanner classes and connects them. Then the input stream is fed into the scanner object and the parser gets it's token sequence. Furthermore the driver object is available in the grammar rules as a parameter. Therefore the driver class contains a reference to the structure into which the parsed data is saved.

Definition at line 35 of file LpDriver.h.

Constructor & Destructor Documentation

LpParser::Driver::Driver

(

LpDataBase &

db

)

construct a new parser driver context

Parameters

db	reference to database

Member Function Documentation

void LpParser::Driver::error	(	const class location &	l,
		const string &	m
	)

Error handling with associated line number. This can be modified to output the error e.g. to a dialog box.

void LpParser::Driver::error

(

const string &

m

)

General error handling. This can be modified to output the error e.g. to a dialog box.

bool LpParser::Driver::parse_file

(

const string &

filename

)

Invoke the scanner and parser on a file. Use parse_stream with a std::ifstream if detection of file reading errors is required.

Parameters

filename

input file name

Returns

true if successfully parsed

bool LpParser::Driver::parse_stream	(	std::istream &	in,
		const string &	sname = "stream input"
	)

Invoke the scanner and parser for a stream.

Parameters

in	input stream
sname	stream name for error messages

Returns

true if successfully parsed

bool LpParser::Driver::parse_string	(	const string &	input,
		const string &	sname = "string stream"
	)

Invoke the scanner and parser on an input string.

Parameters

input	input string
sname	stream name for error messages

Returns

true if successfully parsed

Member Data Documentation

class Scanner* LpParser::Driver::lexer

Pointer to the current lexer instance, this is used to connect the parser to the scanner. It is used in the yylex macro.

Definition at line 88 of file LpDriver.h.

LpDataBase& LpParser::Driver::m_db

Reference to the database filled during parsing of the expressions.

Definition at line 92 of file LpDriver.h.

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

• /Users/yibolin/Documents/Projects/Limbo/limbo/parsers/lp/bison/LpDriver.h