C++ parser and exceptions in semantic actions

[John Horigan]

My C++ bison parser has try/catch blocks sprinkled all over the semantic 
actions, but the catch block always does the same thing:

        try {
            ... stuff ...
        } catch (CfdgError e) {
            error(e.where, e.what);
            YYABORT;
        }

I use auto_ptrs to clean-up stray objects. I would like to get rid of all of 
these try/catch blocks and just have a single one around the parse() method:

        try {
            yyresult = parser.parse();
        } catch (CfdgError e) {
            driver.error(e.where, e.what);
        }

But I am worried that the C++ parser might leak objects if I throw an exception 
all the way out of the parse() method. Can any bison developer tell me whether 
any objects are leaked if I throw an exception out of the parse() method and 
then delete the parser? Thanks.

-- john

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