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# Class w3c.pics.parser.ParseException

    java.lang.Object
       |
       +----java.lang.Throwable
               |
               +----java.lang.Exception
                       |
                       +----w3c.pics.parser.ParseException

public class ParseException
extends Exception

This exception is thrown when parse errors are encountered. You can explicitly create objects of this exception type by calling the method generateParseException in the generated parser. You can modify this class to customize your error reporting mechanisms so long as you retain the public fields.

##

currentToken
  This is the last token that has been consumed successfully.
eol
  The end of line string for this machine.
expectedTokenSequences
  Each entry in this array is an array of integers.
specialConstructor
  This variable determines which constructor was used to create this object and thereby affects the semantics of the "getMessage" method (see below).
tokenImage
  This is a reference to the "tokenImage" array of the generated parser within which the parse error occurred.

##

ParseException()
  The following constructors are for use by you for whatever purpose you can think of.
ParseException(String)
ParseException(Token, int[][], String[])
  This constructor is used by the method "generateParseException" in the generated parser.

##

add_escapes(String)
  Used to convert raw characters to their escaped version when these raw version cannot be used as part of an ASCII string literal.
getMessage()
  This method has the standard behavior when this object has been created using the standard constructors.

##

specialConstructor

     protected boolean specialConstructor

  This variable determines which constructor was used to create this object and thereby affects the semantics of the "getMessage" method (see below).

currentToken

     public Token currentToken

  This is the last token that has been consumed successfully. If this object has been created due to a parse error, the token followng this token will (therefore) be the first error token.

expectedTokenSequences

     public int expectedTokenSequences[][]

  Each entry in this array is an array of integers. Each array of integers represents a sequence of tokens (by their ordinal values) that is expected at this point of the parse.

tokenImage

     public String tokenImage[]

  This is a reference to the "tokenImage" array of the generated parser within which the parse error occurred. This array is defined in the generated ...Constants interface.

eol

     protected String eol

  The end of line string for this machine.

##

ParseException

     public ParseException(Token currentTokenVal,
                           int expectedTokenSequencesVal[][],
                           String tokenImageVal[])

  This constructor is used by the method "generateParseException" in the generated parser. Calling this constructor generates a new object of this type with the fields "currentToken", "expectedTokenSequences", and "tokenImage" set. The boolean flag "specialConstructor" is also set to true to indicate that this constructor was used to create this object. This constructor calls its super class with the empty string to force the "toString" method of parent class "Throwable" to print the error message in the form: ParseException:

ParseException

     public ParseException()

  The following constructors are for use by you for whatever purpose you can think of. Constructing the exception in this manner makes the exception behave in the normal way - i.e., as documented in the class "Throwable". The fields "errorToken", "expectedTokenSequences", and "tokenImage" do not contain relevant information. The JavaCC generated code does not use these constructors.

ParseException

     public ParseException(String message)

##

getMessage

     public String getMessage()

  This method has the standard behavior when this object has been created using the standard constructors. Otherwise, it uses "currentToken" and "expectedTokenSequences" to generate a parse error message and returns it. If this object has been created due to a parse error, and you do not catch it (it gets thrown from the parser), then this method is called during the printing of the final stack trace, and hence the correct error message gets displayed.

  Overrides:
    getMessage in class Throwable

add_escapes

     protected String add_escapes(String str)

  Used to convert raw characters to their escaped version when these raw version cannot be used as part of an ASCII string literal.

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