org.eclipse.ocl.lpg
Class DerivedPrsStream

java.lang.Object
  lpg.runtime.PrsStream
      org.eclipse.ocl.lpg.DerivedPrsStream

All Implemented Interfaces:

lpg.runtime.IPrsStream, lpg.runtime.ParseErrorCodes, lpg.runtime.TokenStream

public class DerivedPrsStream
extends lpg.runtime.PrsStream

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 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

DerivedPrsStream(BasicEnvironment env, lpg.runtime.ILexStream iLexStream)

Method Summary

lpg.runtime.ErrorToken	getErrorTokenAtCharacter(int offset) This function returns the index of the token element containing the offset specified.
int	getErrorTokens()
int	getTokenIndexAtCharacter(int offset) Overridden to search only the non-Error nodes, which are the only tokens in monotonic order.
int	makeErrorToken(int firsttok, int lasttok, int errortok, int kind)
void	reportError(int errorCode, int leftToken, int errorToken, int rightToken, java.lang.String[] errorInfo)
void	reportErrorTokenMessage(int error_token, java.lang.String msg) Report error message for given error_token.

Methods inherited from class lpg.runtime.PrsStream

addAdjunct, addToken, afterEol, badToken, dumpToken, dumpTokens, getAdjuncts, getColumn, getColumnOfCharAt, getColumnOfTokenAt, getEndColumn, getEndColumnOfTokenAt, getEndLine, getEndLineNumberOfTokenAt, getEndOffset, getFileName, getFirstErrorToken, getFirstRealToken, getFollowingAdjuncts, getILexStream, getInputBytes, getInputChars, getIToken, getKind, getLastErrorToken, getLastRealToken, getLexStream, getLine, getLineCount, getLineNumberOfCharAt, getLineNumberOfTokenAt, getLineOffset, getMessageHandler, getName, getNext, getPrecedingAdjuncts, getPrevious, getSize, getStartOffset, getStreamIndex, getStreamLength, getToken, getToken, getTokenAt, getTokenAtCharacter, getTokenLength, getTokens, getTokenText, makeAdjunct, makeToken, mapKind, orderedExportedSymbols, orderedTerminalSymbols, peek, remapTerminalSymbols, removeLastToken, reportError, reportError, reportError, reset, reset, resetLexStream, resetTokenStream, setLexStream, setMessageHandler, setSize, setStreamIndex, setStreamLength, setStreamLength, toString, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

DerivedPrsStream

public DerivedPrsStream(BasicEnvironment env,
                        lpg.runtime.ILexStream iLexStream)

Method Detail

getErrorTokenAtCharacter

public lpg.runtime.ErrorToken getErrorTokenAtCharacter(int offset)

This function returns the index of the token element containing the offset specified. If such a token does not exist, it returns the negation of the index of the element immediately preceding the offset.

Since:

1.3

getErrorTokens

public int getErrorTokens()

Since:

1.3

getTokenIndexAtCharacter

public int getTokenIndexAtCharacter(int offset)

Overridden to search only the non-Error nodes, which are the only tokens in monotonic order.

Specified by:

getTokenIndexAtCharacter in interface lpg.runtime.IPrsStream

Overrides:

getTokenIndexAtCharacter in class lpg.runtime.PrsStream

makeErrorToken

public int makeErrorToken(int firsttok,
                          int lasttok,
                          int errortok,
                          int kind)

Specified by:

makeErrorToken in interface lpg.runtime.IPrsStream

Overrides:

makeErrorToken in class lpg.runtime.PrsStream

reportError

public void reportError(int errorCode,
                        int leftToken,
                        int errorToken,
                        int rightToken,
                        java.lang.String[] errorInfo)

Specified by:

reportError in interface lpg.runtime.TokenStream

Overrides:

reportError in class lpg.runtime.PrsStream

Since:

3.0

reportErrorTokenMessage

public final void reportErrorTokenMessage(int error_token,
                                          java.lang.String msg)

Report error message for given error_token.

Parameters:

error_token - the error taken index

msg - the message to report

Since:

1.3