Re: [boost] [range] Trying to extend boost::range::combine to std::tuples

On 2019-12-06 18:09, Mathias Gaunard via Boost wrote:

On Fri, 6 Dec 2019, 14:44 Andres Llopis, wrote:

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zip_iterator works with fusion sequences. Make sure you include boost/fusion/adapted/std_tuple.hpp

Also std::get<N>(x), not x.get<N>().

Thanks Mathias, including fusion adapted std tuple kind of works, only remaining issue is that I cannot use the std::get<> overloads with a type instead of an int:

https://godbolt.org/z/wGJCp-

What could be the problem?

Tuples do not support this operation; conceptually it makes no sense.

They do, since C++14, but only if the type is specified exactly once in the list of types in the tuple. The problem seems to be that the tuple returned by zip_iterator contains references returned after dereferencing the adopted iterators, and you are trying to get a value. Getting references works: https://godbolt.org/z/rdVQGb