Alternatives and similar repositories for optional

Users that are interested in optional are comparing it to the libraries listed below

• boostorg / variant2
  A never-valueless, strong guarantee implementation of std::variant
  ☆69Updated 2 months ago
• boostorg / utility
  Boost.org utility module
  ☆50Updated last week
• boostorg / config
  Boost.org config module
  ☆75Updated last month
• boostorg / range
  Boost.org range module
  ☆46Updated last month
• boostorg / type_traits
  Boost.org type_traits module
  ☆64Updated 2 months ago
• boostorg / fusion
  Boost.org fusion module
  ☆49Updated 2 months ago
• viboes / std-make
  C++ generic make factory
  ☆108Updated 6 years ago
• boostorg / poly_collection
  Fast containers of polymorphic objects.
  ☆68Updated this week
• boostorg / concept_check
  Boost.org concept_check module
  ☆21Updated 2 months ago
• boostorg / outcome
  Provides very lightweight outcome<T> and result<T> (Boost edition)
  ☆44Updated last month
• boostorg / assert
  Boost.Assert
  ☆35Updated 2 months ago
• boostorg / iterator
  Boost.org iterator module
  ☆21Updated last week
• boostorg / mpl
  Boost.org mpl module
  ☆60Updated 2 months ago
• boostorg / variant
  Boost.org variant module
  ☆45Updated 2 months ago
• foonathan / compatibility
  unmaintained - CMake module to activate certain C++ standard, feature checks and appropriate automated workarounds - basically an improve…
  ☆74Updated 8 years ago
• boostorg / contract
  Contract programming for C++
  ☆41Updated 2 weeks ago
• TartanLlama / tl
  A bunch of small C++ utilities
  ☆65Updated last year
• boostorg / random
  Boost.org random module
  ☆36Updated last week
• boostorg / phoenix
  Boost.org phoenix module
  ☆32Updated 2 months ago
• libogonek / ogonek
  A C++11 library for Unicode
  ☆80Updated 5 years ago
• boostorg / callable_traits
  modern C++ type traits and metafunctions for callable types
  ☆135Updated 2 months ago
• potswa / cxx_function
  Prototype for new std::function features, compatible with C++11.
  ☆46Updated 5 years ago
• boostorg / container
  STL-like containers from Boost
  ☆106Updated last month
• mpark / format
  Compile-time Checked, Type-Safe Formatting in C++14
  ☆36Updated 8 years ago
• boostorg / type_index
  Runtime/Compile time copyable type info.
  ☆27Updated last month
• boostorg / stl_interfaces
  A C++14 and later CRTP template for defining iterators
  ☆74Updated 2 months ago
• boostorg / move
  Boost.org move module
  ☆23Updated last month
• boostorg / multi_index
  Boost.org multi_index module
  ☆51Updated 2 months ago
• taocpp / tuple
  Compile-time-efficient proof-of-concept implementation for std::tuple
  ☆94Updated 3 years ago
• taocpp / sequences
  Variadic templates and std::integer_sequence support library
  ☆111Updated 4 months ago