Boost.Hana  1.0.2 Your standard library for metaprogramming
at_key.hpp File Reference

Forward declares boost::hana::at_key. More...

## Namespaces

boost

boost::hana
Namespace containing everything in the library.

## Variables

constexpr auto boost::hana::at_key
Returns the value associated to the given key in a structure, or fail.Given a key and a Searchable structure, at_key returns the first value whose key is equal to the given key, and fails at compile-time if no such key exists. This requires the key to be compile-time Comparable, exactly like for find. at_key satisfies the following: More...

## Detailed Description

Forward declares boost::hana::at_key.