Re: fusion vector, spirit, phoenix actor and forwarding constructor

On 18 July 2016 at 06:28, Lee Clagett <[email protected]> wrote:

> On Sun, 17 Jul 2016 14:54:15 +0900
> Kohei Takahashi <[email protected]> wrote:
>
> > MM,
> >
> >
> > >     While trying to make a smaller case, I've ran into I suppose a
> > >     separate problem (likely unrelated) here:
> > >
> > >
> https://stackoverflow.com/questions/38372392/boost-phoenix-eval-failures
> > >
> > >     The line closest to my real-code line that triggers the error
> > >     above is:
> > >
> > >     start_ %= g2_(_r1);
> > >
> > >     Lee, here is a more complete stack that gets triggered from my
> > >     real code:
> > >
> > >     startrule %= start(_r1);
> > >     qis::rule<Iterator, T*(T*), qis::blank_type> startrule;
> > >     qis::rule<Iterator, T*(T*), qis::locals<X*>, qis::blank_type>
> > > start; /// where T and X are my application types.
> > >     The error stack is here:
> > >
> > >     http://paste.fedoraproject.org/391037/46849462
> > >     http://paste.fedoraproject.org/391037/46849462
> > >     Lee, let me know what to test please? Thanks
> > >
> > >
> > >     MM
> > >
> > >
> > > I managed to have a reproducible case and I updated the
> > >
> https://stackoverflow.com/questions/38372392/boost-phoenix-eval-failures
> > > with the code.
> >
> > Thank you for your investigation. I'll check it.
> >
>
> Someone sent me a more limited failure case:
>
>     int main() {
>         auto iter = boost::phoenix::val(str.begin());
>         boost::fusion::make_vector(iter);
>     }
>
> This was caused entirely by my last patch, which is found only on the
> develop branch. If the OP had errors with Boost 1.60-1.61 it is likely
> a separate but related issue that I attempted to fix in my patch.
>
> Kohei - I started investigating the problem before this thread started
> after I discovered the issue myself. Eventually I started
> [experimenting with `fusion::vector`][0]. I do not plan on merging that
> branch directly; there is a lot going on and some of the changes
> intended for compile time performance have not been analyzed. Instead, I
> will start with smaller patches, with the focus being [adding SFINAE to
> the tuple and vector constructors][1]. Email me directly if you have
> any different thoughts on fixing this.
>
> Lee
>
> [0]
> https://github.com/boostorg/fusion/compare/develop...vtnerd:experimental/vector
> [1]
> https://github.com/boostorg/fusion/compare/develop...vtnerd:experimental/vector#diff-685c7cd829c2781da56b16d34a35526dR300


I had no errors with boost 1.58 g++ 5.3 c++11
then i upgraded my fedora and had errors with boost 1.60 g++6.1 c++11
then i tried with spirit/phoenix/fusion from develop (maybe it doesn't make
sense:-)
note develop+g++6.1 + c++03 works fine

MM

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