[antlr-interest] Re: C++ Segmentation Fault

[lgcraymer]

This one's pretty common--you need to initialize the AST Factory. 
Look at the ANTLR manual under "Using Heterogeneous AST types" in the
"C++ notes".

--Loring


--- In antlr-interest at yahoogroups.com, "Marx Gomes" <ceticobr at y...> wrote:
> Hello, 
> 
> I'm starting to use ANTLR to generate C++ output. I've designed a
> simple grammar, and everything seems to work well, except that I can't
> set "buildAST = true" without getting "Segmentation fault" errors
> whenever I run my parser. Neither ANTLR nor the C++ compiler complain
> about anything in the source files, it compiles nicely, just does not
> work (unless I comment out the "buildAST = true" line, then it runs
> perfectly).
> 
> I was able to trace the problem back to this line:
> 
> RefAST t = nodeFactories[tok->getType()]->second(); 
> 
> inside method "RefAST ASTFactory::create(RefToken tok)"
> in file "AstFactory.cpp"
> 
> Looks like the problem occurs because an invalid index
> ("tok->getType()") is acessed in "nodeFactories", but that's all I can
> say about it, since I'm not very much familiar with the generated
> code.
> 
> Anybody knows where the problem could be? I could post parts of my
> grammar, if it helps.
> 
> Thanks in advance,
> Marx



 
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