mgf::Driver Class Reference

The primary user interface class. More...

#include <Driver.h>

List of all members.

Public Member Functions
	Driver (MgfFile &mgfFile)
	construct a new parser driver context
bool	parse_stream (std::istream &in, const std::string &sname="stream input")
	Invoke the scanner and parser for a stream.
bool	parse_string (const std::string &input, const std::string &sname="string stream")
	Invoke the scanner and parser on an input string.
bool	parse_file (const std::string &filename)
	Invoke the scanner and parser on a file.
void	error (const class location &l, const std::string &m)
	Error handling with associated line number.
void	error (const std::string &m)
	General error handling.
Public Attributes
bool	trace_scanning
	enable debug output in the flex scanner
bool	trace_parsing
	enable debug output in the bison parser
std::string	streamname
	stream name (file or input stream) used for error messages.
Scanner *	lexer
	Pointer to the current lexer instance, this is used to connect the parser to the scanner.
Context	context
	Reference to the calculator context filled during parsing of the expressions.

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Detailed Description

The primary user interface class.

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.

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Constructor & Destructor Documentation

mgf::Driver::Driver

(

MgfFile &

mgfFile

)

construct a new parser driver context

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Member Function Documentation

void mgf::Driver::error

(

const std::string &

m

)

General error handling.

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

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

Error handling with associated line number.

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

bool mgf::Driver::parse_file

(

const std::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 mgf::Driver::parse_stream	(	std::istream &	in,
		const std::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 mgf::Driver::parse_string	(	const std::string &	input,
		const std::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

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Member Data Documentation

Context mgf::Driver::context

Reference to the calculator context filled during parsing of the expressions.

Scanner* mgf::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.

std::string mgf::Driver::streamname

stream name (file or input stream) used for error messages.

bool mgf::Driver::trace_parsing

enable debug output in the bison parser

bool mgf::Driver::trace_scanning

enable debug output in the flex scanner

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

• include/mgfp/Driver.h
• src/Driver.cpp