Re: how to abort when token are discarded

[Joel E. Denny]

On Sat, 12 Feb 2011, Bill Allombert wrote:

> I have a grammar that handles errors.

Do you mean you're using Bison's error token?  Or do you mean that you've 
written grammar rules that match syntactically incorrect input?

> However, in this contest, discarding
> tokens is highly undesirable, much more so than aborting.

Do you mean that you've declared destructors with %destructor?  Do you 
mean that you don't want the parser to execute them when it encounters 
syntax errors in certain contexts?

> What is the proper way to prevent bison from discarding token and 
> instead abort ?

If you can write grammar rules that catch the syntax errors, you could add 
semantic actions that set a flag to tell your destructors not to execute.