src/cpp-common/bt2s/optional.hpp

   1 /*
   2  * Copyright (c) 2023 Philippe Proulx <pproulx@efficios.com>
   3  *
   4  * SPDX-License-Identifier: MIT
   5  */
   6
   7 #ifndef BABELTRACE_CPP_COMMON_BT2S_OPTIONAL_HPP
   8 #define BABELTRACE_CPP_COMMON_BT2S_OPTIONAL_HPP
   9
  10 #include "cpp-common/vendor/optional-lite/optional.hpp"
  11
  12 namespace bt2s {
  13
  14 template <typename T>
  15 using optional = nonstd::optional<T>;
  16
  17 using nullopt_t = nonstd::nullopt_t;
  18 using bad_optional_access = nonstd::bad_optional_access;
  19 constexpr nullopt_t nullopt {nonstd::nullopt};
  20
  21 template <typename T>
  22 constexpr optional<typename std::decay<T>::type> make_optional(T&& value)
  23 {
  24     return nonstd::make_optional(std::forward<T>(value));
  25 }
  26
  27 template <typename T, typename... ArgTs>
  28 constexpr optional<T> make_optional(ArgTs&&...args)
  29 {
  30     return nonstd::make_optional<T>(std::forward<ArgTs>(args)...);
  31 }
  32
  33 using in_place_t = nonstd::in_place_t;
  34
  35 template <typename T>
  36 inline in_place_t in_place()
  37 {
  38     return nonstd::in_place<T>();
  39 }
  40
  41 template <std::size_t K>
  42 inline in_place_t in_place()
  43 {
  44     return nonstd::in_place<K>();
  45 }
  46
  47 template <typename T>
  48 inline in_place_t in_place_type()
  49 {
  50     return nonstd::in_place_type<T>();
  51 }
  52
  53 template <std::size_t K>
  54 inline in_place_t in_place_index()
  55 {
  56     return nonstd::in_place_index<K>();
  57 }
  58
  59 } /* namespace bt2s */
  60
  61 #endif /* BABELTRACE_CPP_COMMON_BT2S_OPTIONAL_HPP */