ANTLRworks fails to generate proper Java Code

[FriedrichGretz]

I have a simple grammar (cf. https://gist.github.com/4499299)

If I compile it manually with antlr-3.5-complete.jar and set up a manual test rig, everything works as expected.

However, if I use ANTLRworks 1.5, I check the grammar.. OK, I generate code.. OK I click on debug and it starts compiling and complains abour errors in the parser (cf. gist above).

[sharwell]

I am not able to reproduce this bug. The grammar you provided compiled and ran in the ANTLRWorks debugger without problems.

[FriedrichGretz]

OK, that's funny. So here is what happens on my machine: Open ANTLRworks, create new grammar "test", c&p the grammar from above, check grammar, generate code, debug... At this point an error occurrs and you see the output I posted in the gist on the console.

I am using Windows 7, ANTLRworks 1.5, in the preferences the compiler is set to javac, so I assume it takes the javac which is in the OS's PATH variable and that is JDK version 1.6.0_26.

(I do have also java 7 on my system but I changed the path for javac back to java 6 since something ANTLR related would not work with 7 as before...)

[tyconnell]

I am having the same issue. I downloaded the csv grammar from http://www.harward.us/~nharward/antlr/csv.g (linked of of http://www.antlr.org/grammar/list.html). Open it up in antlrworks 1.5 - generate code. Debug mode generates: https://gist.github.com/4513995

[housephd]

I too have experienced the same issue after upgrading to ANTLRworks 1.5. I have tested it on two machines---my home computer (Win7 64-bit with the latest 64-bit Java7 release) and a fresh install on my work computer (Win 7 64-bit with 32-bit Java6 and Java7). Both my own work and the example provided by Friedrich (https://gist.github.com/4499299) generate incorrect code, missing the exception types after all of the "throws" keywords.

Running the same test grammar in ANTLRworks 1.4.3 seemed to work just fine.

[LordZoltan]

I'm just adding a repro vote to this. Running on Windows, have got JDK 1.7 update 13 installed and Antlrworks 1.5.

The parser code that is generated (note - the lexer is fine) has empty 'throws' keywords - i.e. is missing the 'RecognitionException' type.

Generating code for the same grammar in 1.4.3 works fine.

[LordZoltan]

Hi Sam just a quick note to say a) thank you and b) I've just started using v2 which, I believe, didn't have this bug. SoiI appreciate you fixing something in this earlier version!

[TonyGrayCanada]

Thanks for fixing, I had this too. I'm in the C# world, so when I want to debug/interpret I have to keep parallel grammars that are suitable for the Java target. When the debugger stopped working for those, I was stuck. I'll use 1.4.3 until the update is released.

[rensink]

Glad to have found this fix almost as soon as I encountered the bug; however, please note that the default download link from http://www.antlr3.org/download.html points to the broken version 1.5, not the repaired version 1.5.1. --Arend