Re: [Boost-users] [Boost.Spirit] Synthesised attributes and sub-rules

Subject: Re: [Boost-users] [Boost.Spirit] Synthesised attributes and sub-rules
From: Vitaly Budovski (vbudovski+news_at_[hidden])
Date: 2010-10-20 02:06:01

On 14 October 2010 22:36, Hartmut Kaiser <hartmut.kaiser_at_[hidden]> wrote:
> That should be easy, see below.
>
>
> Â  Â start = a_rule | b_rule | c_rule;
>

<snip>

> Â  Â qi::rule<Iterator, std::vector<int>()> a_rule;
> Â  Â qi::rule<Iterator, std::vector<int>()> b_rule;
> Â  Â qi::rule<Iterator, std::vector<int>()> c_rule;
>
> Â  Â qi::rule<Iterator, std::vector<int>()> start;

Hi Hartmut,

Thanks for your help. I've upgraded my version of Spirit to the one
from Boost 1.44, so things work better now. However, I'm still unable
to compile when I change my rule to something like: start = a_rule |
*b_rule. The * and + operators cause the compiler to generate the
following error: boost/spirit/home/qi/detail/assign_to.hpp:109: error:
invalid static_cast from type ‘const std::vector<int,
std::allocator<int> >’ to type ‘int'.

Any ideas?

Thanks,

Vitaly