From: Vladimir Prus (ghost_at_[hidden])
Date: 2001-05-21 10:12:47
Vesa Karvonen wrote
> > This is interesting, but probably is not usefull.
> > With small grammars this might work,
> This is exactly the reason why I completely disagree on the usefulness
> point.
> [snip]
> Now lets turn the comment into pseudo code:
> istream& operator>>(istream& s, complex& a)
> {
> Terminal<double> re, im;
> Parser parser = re
> | '(' + re + ')'
> | '(' + re + ',' + im +')'
> ;
> s >> parser;
> return complex(re,im);
> }
> The above pseudo code is something I dreamed in early 1999.
Well, this is nice. However, it seems like the grammar here is not LL(1). Am
I wrong? If I right, how this is supposed to work.
> > Template metaprograms are very hard to write, debug and use.
> True, but the problems are solvable and the benefits are clear.
I would like to see working implementation that can handle syntax that you've
given a few lines above.
-- Regards, Vladimir