Re: Possible regression in boost 1.61

On 25/05/2016 5:57 PM, Peter Gerell wrote:
>> What's the exact type of start_rule() and what is the type from the linker error and what's the difference?
>
> This is the linker error I get, I have replaced the hard to read iterator type and removed boost::spirit:: prefixes.
>
> common.cpp.o: In function `bool x3::rule<count_class, ast::Count, false>::parse<iterator, x3::unused_type, ast::Start>(terator&, iterator const&, x3::unused_type const&, x3::unused_type, ast::Start&) const':
> rule.hpp:116: undefined reference to `bool parse_rule<iterator, x3::unused_type, ast::Start>(x3::rule<count_class, ast::Count, false>, iterator&, iterator const&, x3::unused_type const&, ast::Start&)'
>
> Notice the mix of ast::Count and ast::Start.
>
> The following parse_rule does exist in expression.cpp.o but for some reason this is not used.
> bool parse_rule<iterator, x3::unused_type, ast::Count>(x3::rule<count_class, ast::Count, false>, iterator&, iterator const&, x3::unused_type const&, ast::Count&)
>
> I can make the error go away by changing
> using count_type = x3::rule<count_class, ast::Count>;
> to
> using count_type = x3::rule<count_class, ast::Start>;
>
> However this breaks the original application in other ways as other rules still tries to call
> bool parse_rule<iterator, x3::unused_type, ast::Count>(x3::rule<count_class, ast::Count, false>, iterator&, iterator const&, x3::unused_type const&, ast::Count&)
> which no longer exist.

Can you try to emit the actual type of start_rule() so we can compare?
Maybe by doing something like:

    int x = start_rule();

which will give you an error message with the type returned by start_rule().

Cheers,
-- 
Joel de Guzman
http://www.ciere.com
http://boost-spirit.com
http://www.cycfi.com/


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