semanticAnalyzer
Class SemanticError

java.lang.Object
  java.lang.Throwable
      java.lang.Exception
          semanticAnalyzer.SemanticError

All Implemented Interfaces:

java.io.Serializable

public class SemanticError
extends java.lang.Exception

This class is used as a general exception class for whatever semantic error can occur. Feel free to derive specialized classes or use only this one. Whenever this class is instanciated, the static error-count will be incremented to keep track of the total number of errors. After semantic analysis, exitIfErrorOccured() can be used to generate a final error message and to reset the counter.

See Also:

Serialized Form

Constructor Summary

SemanticError(java.lang.String errorMessage)

SemanticError(java.lang.String errorMessage, AbstractSymbol filename, TreeNode t)

SemanticError(java.lang.String errorMessage, Class_ c)

Method Summary

static void	exitIfErrorsOccured() Checks if any errors occured.
protected static java.lang.String	makeErrorMessage(AbstractSymbol filename, TreeNode t) Returns a string containing the file name and the line number of the given tree node.
protected static java.lang.String	makeErrorMessage(Class_ c) Returns an error-information-string with the line number and file name of the given class.

Methods inherited from class java.lang.Throwable

fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

SemanticError

public SemanticError(java.lang.String errorMessage)

SemanticError

public SemanticError(java.lang.String errorMessage,
                     Class_ c)

SemanticError

public SemanticError(java.lang.String errorMessage,
                     AbstractSymbol filename,
                     TreeNode t)

Method Detail

makeErrorMessage

protected static java.lang.String makeErrorMessage(Class_ c)

Returns an error-information-string with the line number and file name of the given class.

Parameters:

c - the class

Returns:

a string which can be used as (part of) the error message

makeErrorMessage

protected static java.lang.String makeErrorMessage(AbstractSymbol filename,
                                                   TreeNode t)

Returns a string containing the file name and the line number of the given tree node.

Parameters:

filename - the file name

t - the tree node

Returns:

a string which can be used as (part of) the error message

exitIfErrorsOccured

public static void exitIfErrorsOccured()
                                throws SemanticError

Checks if any errors occured. If so, an information is printed and the program is stopped.

Throws:

SemanticError