Re: Linking error when changing > to >>

On 17-11-16 18:52, Larry Evans wrote:
> that r_attr has a type that looks like a
> std::string::const_iterator, which has got to be wrong.

Yes that sounds wrong. The actual type is the one I instantiate in this
workaround I showed on Larry's request:

https://github.com/sehe/linker_error_example/commit/021b36105e010b9134b76cdf8b47952589d5fff8

namespace {
    template <typename Seq, size_t N>
        using field_at =
boost::fusion::basic_iterator<boost::fusion::struct_iterator_tag,
boost::fusion::random_access_traversal_tag, Seq, N>;
    template <typename Seq, size_t N, size_t M>
        using fields   = boost::fusion::iterator_range<field_at<Seq, N>,
field_at<Seq, M> >;

    using Attributes = fields<client::ast::VariableDec, 1, 2>;
    using Context  = x3::context<x3::skipper_tag,
x3::char_class<boost::spirit::char_encoding::ascii, x3::space_tag>
const, x3::unused_type>;
}

template bool parse_rule<std::string::const_iterator, Context,
fields<client::ast::VariableDec, 1, 2> >(
    decltype(type),
    std::string::const_iterator &,
    std::string::const_iterator const &,
    Context const &,
    Attributes &);

}}

Here `Attributes` is a Fusion iterator range (of 1 element), which
happens to, surprise, describe the second member of
`client::ast::VariableDec`. The above is merely the humanized
"descriptive" spelling of the types in the linker error.

See my older post here
<http://boost.2283326.n4.nabble.com/Linking-error-when-changing-gt-to-gt-gt-tt4689820.html#a4689860>
for the reason why the linker error occurs

Seth

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