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.
| Modifiers | Name | Description |
|---|---|---|
Token |
currentToken |
This is the last token that has been consumed successfully. |
protected java.lang.String |
eol |
The end of line string for this machine. |
int |
expectedTokenSequences |
Each entry in this array is an array of integers. |
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). |
java.lang.String[] |
tokenImage |
This is a reference to the "tokenImage" array of the generated parser within which the parse error occurred. |
| Constructor and description |
|---|
ParseException
(Token currentTokenVal, int expectedTokenSequencesVal, java.lang.String[] tokenImageVal)This constructor is used by the method "generateParseException" in the generated parser. |
ParseException
()The following constructors are for use by you for whatever purpose you can think of. |
ParseException
(java.lang.String message)Constructor with message. |
| Type | Name and description |
|---|---|
protected java.lang.String |
add_escapes(java.lang.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. |
java.lang.String |
getMessage()This method has the standard behavior when this object has been created using the standard constructors. |
| Methods inherited from class | Name |
|---|---|
class java.lang.Exception |
java.lang.Exception#printStackTrace(), java.lang.Exception#printStackTrace(java.io.PrintWriter), java.lang.Exception#printStackTrace(java.io.PrintStream), java.lang.Exception#fillInStackTrace(), java.lang.Exception#getCause(), java.lang.Exception#initCause(java.lang.Throwable), java.lang.Exception#toString(), java.lang.Exception#getMessage(), java.lang.Exception#getLocalizedMessage(), java.lang.Exception#getStackTrace(), java.lang.Exception#setStackTrace([Ljava.lang.StackTraceElement;), java.lang.Exception#addSuppressed(java.lang.Throwable), java.lang.Exception#getSuppressed(), java.lang.Exception#wait(long, int), java.lang.Exception#wait(long), java.lang.Exception#wait(), java.lang.Exception#equals(java.lang.Object), java.lang.Exception#hashCode(), java.lang.Exception#getClass(), java.lang.Exception#notify(), java.lang.Exception#notifyAll() |
class java.lang.Throwable |
java.lang.Throwable#printStackTrace(), java.lang.Throwable#printStackTrace(java.io.PrintWriter), java.lang.Throwable#printStackTrace(java.io.PrintStream), java.lang.Throwable#fillInStackTrace(), java.lang.Throwable#getCause(), java.lang.Throwable#initCause(java.lang.Throwable), java.lang.Throwable#toString(), java.lang.Throwable#getMessage(), java.lang.Throwable#getLocalizedMessage(), java.lang.Throwable#getStackTrace(), java.lang.Throwable#setStackTrace([Ljava.lang.StackTraceElement;), java.lang.Throwable#addSuppressed(java.lang.Throwable), java.lang.Throwable#getSuppressed(), java.lang.Throwable#wait(long, int), java.lang.Throwable#wait(long), java.lang.Throwable#wait(), java.lang.Throwable#equals(java.lang.Object), java.lang.Throwable#hashCode(), java.lang.Throwable#getClass(), java.lang.Throwable#notify(), java.lang.Throwable#notifyAll() |
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.
The end of line string for this machine.
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.
This variable determines which constructor was used to create this object and thereby affects the semantics of the "getMessage" method (see below).
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.
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:
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.
Constructor with message.
Used to convert raw characters to their escaped version when these raw version cannot be used as part of an ASCII string literal.
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.