ceph/src/boost/boost/mp11/detail/mp_min_element.hpp

   1 #ifndef BOOST_MP11_DETAIL_MP_MIN_ELEMENT_HPP_INCLUDED
   2 #define BOOST_MP11_DETAIL_MP_MIN_ELEMENT_HPP_INCLUDED
   3
   4 //  Copyright 2015-2017 Peter Dimov.
   5 //
   6 //  Distributed under the Boost Software License, Version 1.0.
   7 //
   8 //  See accompanying file LICENSE_1_0.txt or copy at
   9 //  http://www.boost.org/LICENSE_1_0.txt
  10
  11 #include <boost/mp11/detail/mp_fold.hpp>
  12 #include <boost/mp11/list.hpp>
  13 #include <boost/mp11/utility.hpp>
  14
  15 namespace boost
  16 {
  17 namespace mp11
  18 {
  19
  20 // mp_min_element<L, P>
  21 namespace detail
  22 {
  23
  24 template<template<class...> class P> struct select_min
  25 {
  26     template<class T1, class T2> using fn = mp_if<P<T1, T2>, T1, T2>;
  27 };
  28
  29 } // namespace detail
  30
  31 template<class L, template<class...> class P> using mp_min_element = mp_fold_q<mp_rest<L>, mp_first<L>, detail::select_min<P>>;
  32 template<class L, class Q> using mp_min_element_q = mp_min_element<L, Q::template fn>;
  33
  34 // mp_max_element<L, P>
  35 namespace detail
  36 {
  37
  38 template<template<class...> class P> struct select_max
  39 {
  40     template<class T1, class T2> using fn = mp_if<P<T2, T1>, T1, T2>;
  41 };
  42
  43 } // namespace detail
  44
  45 template<class L, template<class...> class P> using mp_max_element = mp_fold_q<mp_rest<L>, mp_first<L>, detail::select_max<P>>;
  46 template<class L, class Q> using mp_max_element_q = mp_max_element<L, Q::template fn>;
  47
  48 } // namespace mp11
  49 } // namespace boost
  50
  51 #endif // #ifndef BOOST_MP11_DETAIL_MP_MIN_ELEMENT_HPP_INCLUDED