Boost.Hana  1.6.0 Your standard library for metaprogramming
index_if.hpp File Reference

Forward declares boost::hana::index_if. More...

## Namespaces

boost::hana
Namespace containing everything in the library.

## Variables

constexpr auto boost::hana::index_if
Finds the value associated to the first key satisfying a predicate.Given an Iterable structure xs and a predicate pred, index_if(xs, pred) returns a hana::optional containing an IntegralConstant of the index of the first element that satisfies the predicate or nothing if no element satisfies the predicate. More...

## Detailed Description

Forward declares boost::hana::index_if.