[antlr-interest] java.lang.OutOfMemoryError: Java heap space

[Wincent Colaiuta]

El 5/6/2007, a las 21:04, Terence Parr escribió:

> Hmm...there is supposed to be a fail safe in their bad times out if  
> it takes too long to build a DFA. is the grammar very big?
>
>  perhaps you guys can e-mail me or grammars separately and I can  
> try them out.

The grammar can be viewed here:

   <http://pastie.textmate.org/68006>

Or directly downloaded here:

   <http://pastie.textmate.org/68006/download>

Also attaching it to this message, although I expect the list server  
will strip it...

I don't know if that would be considered very big by ANTLR standards  
though... I suspect not.

A bit more playing with the commandline I discovered the "-report", "- 
X" and "-Xdbgconversion" switches... Interestingly, if I pass the "- 
Xdbgconversion" switch, then ANTLR finishes in about 10 seconds and  
there is no out-of-memory exception. The generated lexer (in C) is  
huge though (nearly 300,000 lines). GCC compiles it without complaining.

But I think the size of the lexer indicates something bad is going on  
in the grammar. No idea why ANTLR would run out of memory without the

Cheers,
Wincent

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