Boost.Hana  1.7.1
Your standard library for metaprogramming
std::pair< First, Second > Struct Template Reference


template<typename First, typename Second>
struct std::pair< First, Second >

Adaptation of std::pair for Hana.

Modeled concepts

A std::pair models exactly the same concepts as a hana::pair. Please refer to the documentation of hana::pair for details.

// Copyright Louis Dionne 2013-2017
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file or copy at
namespace hana = boost::hana;
constexpr auto pair = std::make_pair(1, 'x');
static_assert(hana::first(pair) == 1, "");
static_assert(hana::second(pair) == 'x', "");
static_assert(hana::not_equal(pair, std::make_pair(3, 'z')), "");
static_assert(hana::less(pair, std::make_pair(3, 'x')), "");
int main() { }
Adapts std::pair for use with Hana.
Defines boost::hana::first.
constexpr auto not_equal
Returns a Logical representing whether x is not equal to y.
Definition: not_equal.hpp:54
constexpr auto less
Returns a Logical representing whether x is less than y.
Definition: less.hpp:37
constexpr auto first
Returns the first element of a pair.
Definition: first.hpp:33
constexpr auto second
Returns the second element of a pair.
Definition: second.hpp:32
Defines boost::hana::less.
Namespace containing everything in the library.
Definition: accessors.hpp:20
Defines boost::hana::not_equal.
Defines boost::hana::second.