FM / detail

/usr/include/boost/histogram/detail

Name	Size	Mode	Actions
accumulator_traits.hpp	2812	0644	edit dl rm
args_type.hpp	1546	0644	edit dl rm
argument_traits.hpp	2548	0644	edit dl rm
array_wrapper.hpp	2050	0644	edit dl rm
axes.hpp	13362	0644	edit dl rm
common_type.hpp	1335	0644	edit dl rm
convert_integer.hpp	566	0644	edit dl rm
counting_streambuf.hpp	1923	0644	edit dl rm
detect.hpp	8320	0644	edit dl rm
fill.hpp	12609	0644	edit dl rm
fill_n.hpp	13696	0644	edit dl rm
index_translator.hpp	3437	0644	edit dl rm
iterator_adaptor.hpp	4484	0644	edit dl rm
large_int.hpp	6543	0644	edit dl rm
limits.hpp	986	0644	edit dl rm
linearize.hpp	4482	0644	edit dl rm
make_default.hpp	710	0644	edit dl rm
mutex_base.hpp	1228	0644	edit dl rm
nonmember_container_access.hpp	1448	0644	edit dl rm
operators.hpp	4494	0644	edit dl rm
optional_index.hpp	1426	0644	edit dl rm
priority.hpp	593	0644	edit dl rm
reduce_command.hpp	2541	0644	edit dl rm
relaxed_equal.hpp	1217	0644	edit dl rm
relaxed_tuple_size.hpp	956	0644	edit dl rm
replace_type.hpp	818	0644	edit dl rm
safe_comparison.hpp	2519	0644	edit dl rm
span.hpp	9048	0644	edit dl rm
static_if.hpp	1477	0644	edit dl rm
sub_array.hpp	3577	0644	edit dl rm
try_cast.hpp	1575	0644	edit dl rm
tuple_slice.hpp	1019	0644	edit dl rm
type_name.hpp	1083	0644	edit dl rm
variant_proxy.hpp	2430	0644	edit dl rm

Edit: /usr/include/boost/histogram/detail/accumulator_traits.hpp (2812B)

// Copyright 2019 Hans Dembinski
//
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt
// or copy at http://www.boost.org/LICENSE_1_0.txt)

#ifndef BOOST_HISTOGRAM_DETAIL_ACCUMULATOR_TRAITS_HPP
#define BOOST_HISTOGRAM_DETAIL_ACCUMULATOR_TRAITS_HPP

#include <boost/histogram/detail/priority.hpp>
#include <boost/histogram/fwd.hpp>
#include <tuple>
#include <type_traits>

namespace boost {

// forward declare accumulator_set so that it can be matched below
namespace accumulators {
template <class, class, class>
struct accumulator_set;
}

namespace histogram {
namespace detail {

template <bool WeightSupport, class... Ts>
struct accumulator_traits_holder {
  static constexpr bool weight_support = WeightSupport;
  using args = std::tuple<Ts...>;
};

// member function pointer with weight_type as first argument is better match
template <class R, class T, class U, class... Ts>
accumulator_traits_holder<true, Ts...> accumulator_traits_impl_call_op(
    R (T::*)(boost::histogram::weight_type<U>, Ts...));

template <class R, class T, class U, class... Ts>
accumulator_traits_holder<true, Ts...> accumulator_traits_impl_call_op(
    R (T::*)(boost::histogram::weight_type<U>&, Ts...));

template <class R, class T, class U, class... Ts>
accumulator_traits_holder<true, Ts...> accumulator_traits_impl_call_op(
    R (T::*)(boost::histogram::weight_type<U>&&, Ts...));

template <class R, class T, class U, class... Ts>
accumulator_traits_holder<true, Ts...> accumulator_traits_impl_call_op(
    R (T::*)(const boost::histogram::weight_type<U>&, Ts...));

// member function pointer only considered if all specializations above fail
template <class R, class T, class... Ts>
accumulator_traits_holder<false, Ts...> accumulator_traits_impl_call_op(R (T::*)(Ts...));

template <class T>
auto accumulator_traits_impl(T&, priority<1>)
    -> decltype(accumulator_traits_impl_call_op(&T::operator()));

template <class T>
auto accumulator_traits_impl(T&, priority<1>)
    -> decltype(std::declval<T&>() += 0, accumulator_traits_holder<true>{});

template <class T>
auto accumulator_traits_impl(T&, priority<0>) -> accumulator_traits_holder<false>;

// for boost.accumulators compatibility
template <class S, class F, class W>
accumulator_traits_holder<false, S> accumulator_traits_impl(
    boost::accumulators::accumulator_set<S, F, W>&, priority<1>) {
  static_assert(std::is_same<W, void>::value,
                "accumulator_set with weights is not directly supported, please use "
                "a wrapper class that implements the Accumulator concept");
}

template <class T>
using accumulator_traits =
    decltype(accumulator_traits_impl(std::declval<T&>(), priority<1>{}));

} // namespace detail
} // namespace histogram
} // namespace boost

#endif

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