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/optional_index.hpp (1426B)

// 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_OPTIONAL_INDEX_HPP
#define BOOST_HISTOGRAM_DETAIL_OPTIONAL_INDEX_HPP

#include <cassert>
#include <cstdint>

namespace boost {
namespace histogram {
namespace detail {

constexpr auto invalid_index = ~static_cast<std::size_t>(0);

// integer with a persistent invalid state, similar to NaN
struct optional_index {
  std::size_t value;

optional_index& operator=(std::size_t x) noexcept {
    value = x;
    return *this;
  }

optional_index& operator+=(std::intptr_t x) noexcept {
    assert(x >= 0 || static_cast<std::size_t>(-x) <= value);
    if (value != invalid_index) { value += x; }
    return *this;
  }

optional_index& operator+=(const optional_index& x) noexcept {
    if (value != invalid_index) return operator+=(x.value);
    value = invalid_index;
    return *this;
  }

operator std::size_t() const noexcept { return value; }

friend bool operator<=(std::size_t x, optional_index idx) noexcept {
    return x <= idx.value;
  }
};

constexpr inline bool is_valid(const std::size_t) noexcept { return true; }

inline bool is_valid(const optional_index x) noexcept { return x.value != invalid_index; }

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

#endif

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