org.eclipse.ocl.lpg

Class DerivedLexStream

java.lang.Object

lpg.runtime.LexStream

lpg.runtime.LpgLexStream

org.eclipse.ocl.lpg.DerivedLexStream

All Implemented Interfaces:

lpg.runtime.ILexStream, lpg.runtime.ParseErrorCodes, lpg.runtime.TokenStream

public abstract class DerivedLexStream
extends lpg.runtime.LpgLexStream

This DerivedLexStream will be used in favour of the LpgLexStream for the OCLLexer, so that some customization are introduced and exploited by the generated OCLLexer

Since:

3.0

Field Summary

Fields

Modifier and Type	Field and Description
protected static int	ECLIPSE_TAB_VALUE

Fields inherited from class lpg.runtime.LexStream

prsStream

Fields inherited from interface lpg.runtime.ParseErrorCodes

BEFORE_CODE, DELETION_CODE, EOF_CODE, ERROR_CODE, ERROR_RULE_ERROR_CODE, ERROR_RULE_WARNING_CODE, errorMsgText, INSERTION_CODE, INVALID_CODE, INVALID_TOKEN_CODE, LEX_ERROR_CODE, MERGE_CODE, MISPLACED_CODE, NO_MESSAGE_CODE, SCOPE_CODE, SECONDARY_CODE, SUBSTITUTION_CODE

Constructor Summary

Constructors

Constructor and Description
DerivedLexStream()
DerivedLexStream(BasicEnvironment environment, char[] input_chars, java.lang.String filename, int tab)
DerivedLexStream(BasicEnvironment environment, java.lang.String filename, int tab)

Method Summary

Modifier and Type	Method and Description
protected int	computeErrorCode(int leftToken, int rightToken)
void	initialize(char[] inputChars) Define the input text as a given array of characters.
void	reportLexicalError(int errorCode, int leftLoc, int rightLoc, int errorLeftLoc, int errorRightLoc, java.lang.String[] errorInfo) Errors generated within the lexer are redirected to the error handler if there is one.

Methods inherited from class lpg.runtime.LpgLexStream

getKind, orderedExportedSymbols

Methods inherited from class lpg.runtime.LexStream

afterEol, badToken, computeLineOffsets, getCharValue, getColumn, getColumnOfCharAt, getEndColumn, getEndLine, getFileName, getFirstErrorToken, getFirstRealToken, getInputChars, getIntValue, getIPrsStream, getLastErrorToken, getLastRealToken, getLine, getLine, getLineCount, getLineNumberOfCharAt, getLineOffset, getLineOffsets, getLocation, getMessageHandler, getName, getNext, getPrevious, getPrsStream, getStreamIndex, getStreamLength, getTab, getToken, getToken, initialize, initialize, initialize, makeToken, peek, reportError, reportError, reportError, reportError, reportLexicalError, reset, reset, setFileName, setInputChars, setLineOffset, setLineOffsets, setMessageHandler, setPrsStream, setStreamIndex, setStreamLength, setTab, toString

Methods inherited from class java.lang.Object

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

Field Detail

ECLIPSE_TAB_VALUE

protected static final int ECLIPSE_TAB_VALUE

See Also:

Constant Field Values

Constructor Detail

DerivedLexStream

public DerivedLexStream(BasicEnvironment environment,
                        java.lang.String filename,
                        int tab)
                 throws java.io.IOException

Throws:

java.io.IOException

DerivedLexStream

public DerivedLexStream(BasicEnvironment environment,
                        char[] input_chars,
                        java.lang.String filename,
                        int tab)

DerivedLexStream

public DerivedLexStream()

Method Detail

computeErrorCode

protected int computeErrorCode(int leftToken,
                               int rightToken)

initialize

public void initialize(char[] inputChars)

Define the input text as a given array of characters.

Parameters:

inputChars - the characters

reportLexicalError

public void reportLexicalError(int errorCode,
                               int leftLoc,
                               int rightLoc,
                               int errorLeftLoc,
                               int errorRightLoc,
                               java.lang.String[] errorInfo)

Errors generated within the lexer are redirected to the error handler if there is one. Note that other variants of reportLexicalError and reportError either feed this one, are fed from a default implementation of this one or originate in the parser, where a ParserErrorHandler can intercept them.

Specified by:

reportLexicalError in interface lpg.runtime.ILexStream

Overrides:

reportLexicalError in class lpg.runtime.LexStream

Since:

3.0