[antlr-interest] ANTRL 3.3

[Terence Parr]

hi. that's telling you to fix the decision associated with that spewing of conversion notes.

Ter
On Dec 10, 2010, at 6:51 AM, Justin Murray wrote:

> Hello,
> 
> 
> 
> I am currently developing the grammar for a very large language. It has
> several hundred keywords, and hundreds of syntax permutations in the
> form of commands. The language itself is poorly designed, but we
> unfortunately have to continue to support it. My question involves the
> update to ANTLR v3.3. My grammar file is able to be processed by ANTLR
> v3.2 without any errors, and produces a working output (C target). I had
> to bump up the java stack size to 64M, and the heap size to 1024M, but
> from what I have read this is fairly common. The processing takes about
> 15 seconds on average. Yesterday, I decided to try upgrading to ANTLR
> v3.3, but have been unsuccessful. When processing the exact same grammar
> file, it will spend several minutes consuming one of my cpu cores, and
> then ultimately crash with an outOfMemory exception. I tried increasing
> the memory further, but it made no difference. I tried using the
> -Xwatchconversion option, but it was not very helpful. It prints out
> thousands of lines like "convert DFA state 4192 (229 nfa states)", but
> never appears to get stuck on a particular line, it just eventually runs
> out of memory. What has changed in v3.3 that could cause this to happen?
> What should I try next?
> 
> 
> 
> Thank you,
> 
> Justin Murray 
> Software Engineer 
> jmurray at aerotech.com
> 
> Aerotech, Inc. 
> 101 Zeta Drive 
> Pittsburgh, PA 15238 
> 412-963-7470
> 
> 
> 
> 
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