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From: Larry Evans (cppljevans_at_[hidden])
Date: 2005-10-24 06:46:32

On 10/24/2005 04:08 AM, Korcan Hussein wrote:
> I relized this when i was reading Spirit's documentation. I did mention from
> the begining all terminal leaf node types must be given, like in an MPL

What's a "terminal leaf node type"?

> sequence (and probably for nonterminal node types if you can add more to the
> set). I did also mention this was in no way been generalized or a library of
> any form it was just an idea i had the other day. It's not true that there
> is "no possibility user-defined leaves" it is just not as simple as erasing
> type.

The variant, var, in:

works by having:

           : boost::static_visitor<float>

             Tp::value_type operator()(const Tp& val) const {
                 return val[curr_indx];

             template < typename Expression >
             Tp::value_type operator()(const Expression& exp) const {

where Expression is some nonterminal in the grammar. Is Tp what
you refer to as a "terminal leaf node type"?


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