util
Class ErrorHandler

java.lang.Object
  util.ErrorHandler

public class ErrorHandler
extends java.lang.Object

The ErrorHandler class performs error handling.

Field Summary

int	LEX_ERROR Lexical error constant - use to indicate the type of error
int	PARSE_ERROR Parse error constant - use to indicate the type of error
int	SEMANT_ERROR Semantic error constant - use to indicate the type of error

Constructor Summary

ErrorHandler()

Method Summary

void	checkErrors() Check the errors - halts if there are any registered errors
void	register(int type, java.lang.String errorMessage) Register an error
void	register(int type, java.lang.String filename, int lineNum, java.lang.String errorMessage) Register an error

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

LEX_ERROR

public final int LEX_ERROR

Lexical error constant - use to indicate the type of error

See Also:

Constant Field Values

PARSE_ERROR

public final int PARSE_ERROR

Parse error constant - use to indicate the type of error

See Also:

Constant Field Values

SEMANT_ERROR

public final int SEMANT_ERROR

Semantic error constant - use to indicate the type of error

See Also:

Constant Field Values

Constructor Detail

ErrorHandler

public ErrorHandler()

Method Detail

register

public void register(int type,
                     java.lang.String filename,
                     int lineNum,
                     java.lang.String errorMessage)

Register an error

Parameters:

type - the type (lex, parse, semantic) of error

filename - the name of the filename where the error occurred

lineNum - the starting line number in the source file where the error occurred

errorMessage - the error message

register

public void register(int type,
                     java.lang.String errorMessage)

Register an error

Parameters:

type - the type (lex, parse, semantic) of error

errorMessage - the error message

checkErrors

public void checkErrors()

Check the errors - halts if there are any registered errors