Boost.Hana: boost/hana/fwd/none.hpp File Reference

| Boost.Hana 1.0.0 Your standard library for metaprogramming |

Namespaces | Variables
none.hpp File Reference

Forward declares `boost::hana::none`. More...

## Namespaces

| boost
| boost::hana
| Namespace containing everything in the library.

## Variables

constexpr auto | boost::hana::none
| Returns whether all of the keys of the structure are false-valued.The keys of the structure must be `Logical`s. If the structure is not finite, a true-valued key must appear at a finite "index" in order for this method to finish. More...

## Detailed Description

Forward declares `boost::hana::none`.

Copyright
  Louis Dionne 2013-2016 Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)