Re: How to negate a non-terminal ?

[Hans Aberg]

On 3 May 2009, at 15:46, Samkit Jain wrote:

> Now my question is that, is there any way by which I can negate nt_2  
> while
> creating nt_5 ?

I guess that, as it is not a commonly needed feature, you will need to  
do it by hand. You might also inquire in the Usenet newsgroup  
comp.compilers about this as a general computer language feature.

  Hans