Re: Exception safety of generated C++ parser

[Oleksii Taran]

13.09.12 19:32, Hans Aberg wrote:
> On 13 Sep 2012, at 17:54, Oleksii Taran wrote:
>
>> Does Bison guarantees exception safety in C++ parser, i.e. will it make
>> any clean-up and free memory if an exception is thrown on rule action?
> Yes, the default stack is std::deque.
>
>> I
>> know about %destructor directive, but it seems irrelevant, since
>> destructor code is called only if parser recovers from _syntax_ error.
> This is for the C parser, since C does not provide automatic cleanup. I might 
> be possible to compile this parser as C++ (supported at least in the past), 
> in which case %destructor would be needed.
>

But what if deque holds not objects, but pointers to them? e.g. code
like this:

%union {
  ::std::string *token;
}

How Bison knows that it should call something like `delete token;` ?

-- 
Best regards,
Oleksii Taran