[antlr-interest] Segfault with very simple parser
Ric Klaren
ric.klaren at gmail.com
Sat Aug 26 16:06:17 PDT 2006
On 8/27/06, John Gruenenfelder <johng at as.arizona.edu> wrote:
> Starting simple, I pieced together a very simple parser and lexer from the
> many examples on the ANTLR website. I can run the new parser through ANTLR
> without problems and without errors or warnings. I can even compile it without
> any issues using g++ 4.1.
>
> It's when I try to run this simple parser that I get a segfault. The C++ code
> is:
>
> ...
> OpCLexer lexer(cin);
> OpCParser parser(lexer);
>
> parser.expr();
> RefAST t = parser.getAST();
> ...
You probably forgot to set the ASTFactory:
ASTFactory ast_factory;
parser.initializeASTFactory(ast_factory);
parser.setASTFactory(&ast_factory);
Cheers,
Ric
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