Re: can you give me some comment

[Hans Aberg]

On 20 Mar 2010, at 04:01, Changming Xu wrote:

> pack_vector:
>
>      for (k = 0; ok && k < vector; k++)
>    if (pos[k] == j)
>      ok = false;
>
> I believe I  understand the pack alg from Aho[1986] and flex. But I  
> don't
> understand  why it does not work if  base[i] == base[j] for some i,j

You might also ask in the Usenet newsgroup comp.compilers, which has a  
number of experts on the innards of parsing algorithms.

  Hans