Alternatives and similar repositories for outcome:

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

• ned14 / llfio
  P1031 low level file i/o and filesystem library for the C++ standard
  ☆931Updated last month
• TartanLlama / optional
  C++11/14/17 std::optional with functional-style extensions and reference support
  ☆880Updated 9 months ago
• martinmoene / optional-lite
  optional lite - A C++17-like optional, a nullable object for C++98, C++11 and later in a single-file header-only library
  ☆405Updated this week
• rollbear / strong_type
  An additive strong typedef library for C++14/17/20
  ☆428Updated last month
• foonathan / type_safe
  Zero overhead utilities for preventing bugs at compile time
  ☆1,565Updated 6 months ago
• boost-ext / te
  C++17 Run-time Polymorphism (Type Erasure) library
  ☆466Updated 9 months ago
• Naios / function2
  Improved and configurable drop-in replacement to std::function that supports move only types, multiple overloads and more
  ☆560Updated 7 months ago
• martinmoene / expected-lite
  expected lite - Expected objects in C++11 and later in a single-file header-only library
  ☆446Updated last week
• Naios / continuable
  C++14 asynchronous allocation aware futures (supporting then, exception handling, coroutines and connections)
  ☆839Updated last year
• martinmoene / span-lite
  span lite - A C++20-like span for C++98, C++11 and later in a single-file header-only library
  ☆498Updated 9 months ago
• joboccara / NamedType
  Implementation of strong types in C++
  ☆786Updated 2 years ago
• eliaskosunen / scnlib
  scanf for modern C++
  ☆1,128Updated 4 months ago
• cbeck88 / visit_struct
  A miniature library for struct-field reflection in C++
  ☆544Updated 2 weeks ago
• mpark / variant
  C++17 `std::variant` for C++11/14/17
  ☆689Updated 2 years ago
• ldionne / dyno
  Runtime polymorphism done right
  ☆995Updated 3 years ago
• stlab / libraries
  ASL libraries will be migrated here in the stlab namespace, new libraries will be created here.
  ☆667Updated 3 weeks ago
• bloomen / transwarp
  A header-only C++ library for task concurrency
  ☆625Updated last year
• serge-sans-paille / frozen
  a header-only, constexpr alternative to gperf for C++14 users
  ☆1,385Updated last week
• bfgroup / Lyra
  A simple to use, composable, command line parser for C++ 11 and beyond
  ☆507Updated 2 weeks ago
• boostorg / leaf
  Lightweight Error Augmentation Framework
  ☆318Updated last week
• gracicot / kangaru
  🦘 A dependency injection container for C++11, C++14 and later
  ☆512Updated this week
• tcbrindle / NanoRange
  Range-based goodness for C++17
  ☆361Updated 4 years ago
• beached / daw_json_link
  Fast, convenient JSON serialization and parsing in C++
  ☆484Updated last week
• edouarda / brigand
  Instant compile time C++ 11 metaprogramming library
  ☆572Updated 2 years ago
• andreasbuhr / cppcoro
  A library of C++ coroutine abstractions for the coroutines TS
  ☆383Updated 3 months ago
• eyalz800 / zpp_bits
  A lightweight C++20 serialization and RPC library
  ☆826Updated 3 weeks ago
• TartanLlama / expected
  C++11/14/17 std::expected with functional-style extensions
  ☆1,608Updated 2 months ago
• gsl-lite / gsl-lite
  gsl-lite – A single-file header-only version of ISO C++ Guidelines Support Library (GSL) for C++98, C++11, and later
  ☆915Updated 4 months ago
• martinmoene / string-view-lite
  string_view lite - A C++17-like string_view for C++98, C++11 and later in a single-file header-only library
  ☆431Updated this week
• jll63 / yomm2
  Fast, orthogonal, open multi-methods. Solve the Expression Problem in C++17.
  ☆362Updated 3 months ago