If you download the source code to the Java FX compiler you will have a complete example to work from, assuming a Java target. Start by creating a superclass for the parser and overriding various error reporting points. The JavaFX compiler will show you how to do that.
Jim > -----Original Message----- > From: [email protected] [mailto:antlr-interest- > [email protected]] On Behalf Of Stephen McGruer > Sent: Friday, February 04, 2011 4:14 PM > To: [email protected] > Subject: [antlr-interest] Correct way to handle custom errors? > > I was wondering what the "correct" way to handle custom errors in ANTLR > 3 was. I'm implementing a parser/lexer for a small subset of C, and > want to give better error messages than the general mismatched tokens > error. > > From this post - > http://www.antlr.org/wiki/display/ANTLR3/Error+reporting+and+recovery I > implemented my own error reporting class which grabs the recognition > exception from the Parser. However, I'm then unsure about the best > approach is to start recognising errors - from things as basic as > replacing the name of my variable name rule (ID) with a more user- > friendly term such as "identifier", to more complex things such as > giving nice error messages when the user attempts to set a variable to > a value that isn't an integer or character (the only two allowable > types in my subset). The recognition exception doesn't seem to be too > useful - getMessage() seems to return null. > I assume that the getErrorHeader and getErrorMessage methods do > something different to get information. The only way I can think of > checking for errors at the moment is manually scraping the strings > returned by these methods, which seems... clumsy. > > So, is there a sort of "normal" or "usual" method to approaching > parser/lexer error message handling when doing programming language > parsing? > > I hope the above contained enough information, and made sense. > > Thanks, > Stephen > > List: http://www.antlr.org/mailman/listinfo/antlr-interest > Unsubscribe: http://www.antlr.org/mailman/options/antlr-interest/your- > email-address List: http://www.antlr.org/mailman/listinfo/antlr-interest Unsubscribe: http://www.antlr.org/mailman/options/antlr-interest/your-email-address -- You received this message because you are subscribed to the Google Groups "il-antlr-interest" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/il-antlr-interest?hl=en.
