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Antlr 2 Error Handling


I'd like to do some custom error handling. All parser rules throw this exception. All parser rules throw this exception. First of all I created my own version of an ErrorListener like Sam Harwell suggested: public class ThrowingErrorListener extends BaseErrorListener { public static final ThrowingErrorListener INSTANCE = new ThrowingErrorListener(); @Override public http://apexintsoft.com/error-handling/antlr-error-handling-c.php

Should I have doubts if the organizers of a workshop ask me to sign a behavior agreement upfront? See the examples/java/includeFile directory.This a great way to handle nested include files and so on or to try out multiple grammars to see which appears to fit the data. NB this only works reliably for labels referencing tokens.  The return type of each rule is different, and since ANTLR declares the generated variable's type based on the first rule reference Parser exception handling for grammar rules is a lot like exception handling in a language like C++ or Java.

Antlr4 Error Handling

Does the wifi hump affect aerodynamics or efficiency? tokens \{ COMPILATION_UNIT; TYPE_BLOCK; "import"; \} A workaround in ANTLR 3 might be to implement this 'by hand' in a custom TreeAdaptor implementation. Not sure what to do as I can get the name of the Exception class, but unable to get the message detail back. –user1646481 Nov 29 '12 at 12:52 But did you try what I recommended?

  1. Coworkers quitting under special circumstances -- should telling our manager be one of my options?
  2. ANTLR will generate default error-handling code, or you may specify your own exception handlers.
  3. If the lookahead predicts no alternative of a production in either the parser or lexer, then a NoViableAltException is thrown.
  4. When an exception is caught, execution resumes at that point.
  5. Why don't my users have separate desktops in Windows 10?
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TokenStreamException Indicates that something went wrong while generating a stream of tokens. Could the atmosphere be depleted and put in to bottles? The exceptionType is the exception (or class of exceptions) to catch, and the exceptionVariable is the variable name of the caught exception, so that the action can process the exception if Antlr4 Throw Exception On Error Different RAID settings for different folders on the same logical drive Does it make sense to use an online ELO-rating-test for a beginner as a monthly test tool in order to

more hot questions question feed lang-java about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation Exception handlers arise in one of two ways. I've added some backstory to the question since it appears I might be swimming against the current. –Brad Mace Aug 9 '13 at 4:02 You should just write a http://stackoverflow.com/questions/13624624/antlr-handling-exceptions TokenStreamRetryException Signals aborted recognition of current token.

Is the language you're using C or C++? –chollida Jan 11 '10 at 22:29 C, I'm afraid, so no C++ exception handling available. –Mawg Jan 12 '10 at 2:39 Recognitionexception Antlr 4 The system returned: (22) Invalid argument The remote host or network may be down. How to draw a dotted rectangle around part of equation? share|improve this answer answered May 3 '12 at 9:21 sm13294 443320 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign

Antlr Error Listener

When and why use triangle solder joints Could the Industrial Revolution be delayed indefinitely? http://stackoverflow.com/questions/10386499/handling-antlr-syntax-errors-or-how-to-give-a-better-message-on-unexpected-token In ANTLR 3, this section must be labelled '@members': ANTLR 2 ANTLR 3 class FooParser extends Parser; {     int i; } foo : FOO ; grammar Foo; @members {     Antlr4 Error Handling When are COLUMN aliases in FROM clauses needed? Antlr Bailerrorstrategy What is the difference between electrical engineering and electrical engineering technology?

If you want to see an example of how to use this function, look at this mailing list post. navigate here Zeroes of a not quite holomorphic (but random if helpful) function Multiplication Formatting What is the difference between electrical engineering and electrical engineering technology? Specifying Parser Exception-Handlers You may attach exception handlers to a rule, an alternative, or a labeled element. Parser Exception Handling ANTLR 2.0 generates recursive-descent recognizers. Antlr Baseerrorlistener

Can a familiar use his reaction to attack someone leaving his reach? Are there other pictures of Titan surface from Huygens? Because of this, you must be careful not to use any variables that would have been set by a successful match when an exception is caught. http://apexintsoft.com/error-handling/antlr-c-error-handling.php How would/should under-age penalties work?

Please try the request again. Antlrerrorlistener Why do most of us wear wristwatches on the left hand? Join them; it only takes a minute: Sign up Handling Antlr Syntax Errors or how to give a better message on unexpected token up vote 5 down vote favorite 1 We

Maybe I am doing something wrong here.

For example, instead of seeing T.java:1:9: expecting ID, found ';' you can have the parser generate: T.java:1:9: expecting an identifier, found ';' ANTLR provides an easy way to specify a string How does the Mac SE/30 send video to the analog board? CharStreamException Something bad that happens on the character input stream. Antlr Lexer Example First, if you do nothing, ANTLR will generate a default exception handler for every parser rule.

With my edit shown above, I can get the type of Exception, but not the message detail back. –user1646481 Nov 29 '12 at 12:33 This answer, does not seem Sorry that I already accepted an answer; I didn't expect another. –Mawg Jan 15 '10 at 3:55 1 No worries - hope that it helps you –a_m0d Jan 16 '10 Use this as your "catch all" exception in your main() or other method that invokes a parser, lexer, or treeparser. this contact form share|improve this answer answered Jan 13 '10 at 15:15 a_m0d 6,786114072 Thanks very much, I'll check it out.

CharStreamException Something bad that happens on the character input stream. MismatchedCharException Thrown by CharScanner.match() when it is looking for a character, but finds a different one on the input stream. Not the answer you're looking for? Coworkers quitting under special circumstances -- should telling our manager be one of my options?

Sample a random non-decreasing sequence Which current networking protocol would be the optimal choice for very small FTL bandwidth? That way, the parser doesn't have to deal with lexical errors and ask for another token. How can I generate voltage for a science project? It cannot handle actions or trees for you, but it does some of the grunt work (actually I noticed that it converts ^ to ^^, which is wrong...should leave ^ alone).

Permalink Like May 26, 2008 Unknown User (mbw) The v3 lexer doesn't accept the exclamation point "!" for text omission. From there we can check if we have errors in our custom code.