[Spirit-devel] [Spirit Devel] ADAPT_ADT causes recursive grammars to not compile

[Robert N. <boa...@gm...>]

Why does the following fail to compile?

struct y
{
  const std::vector<y>& get() const;
  void set(const std::vector<y>&);
};

BOOST_FUSION_ADAPT_ADT(y,(std::vector<y>,std::vector<y>,obj.get(),obj.set(val)))

int main()
{
  using namespace boost::spirit::qi;
  using namespace boost::phoenix;
  boost::spirit::qi::rule<std::string::const_iterator,y()> b;
  b = (*b)[at_c<0>(_val) = _1]; //ERROR is here
}

It seems to be a result of fusion loop unrolling or something.  The
libraries don't like the fact we are parsing a vector of y's and storing
them in y.  The above code works with seemingly slight modification, but I
need the above implementation in my application or a workaround.  Attached
is main.cpp, a file with only the offending code and three_main.cpp which
has 2 other similar grammars, both of which will compile.  I think the error
is the result of a bug/feature in the fusion and/or spirit::qi library.
 Please help.

Thanks
--Robert Nelson