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
  ☆904Updated this week
• TartanLlama / optional
  C++11/14/17 std::optional with functional-style extensions and reference support
  ☆872Updated 7 months ago
• rollbear / strong_type
  An additive strong typedef library for C++14/17/20
  ☆420Updated 3 weeks ago
• Naios / function2
  Improved and configurable drop-in replacement to std::function that supports move only types, multiple overloads and more
  ☆550Updated 5 months ago
• Naios / continuable
  C++14 asynchronous allocation aware futures (supporting then, exception handling, coroutines and connections)
  ☆834Updated last year
• boost-ext / te
  C++17 Run-time Polymorphism (Type Erasure) library
  ☆463Updated 7 months ago
• martinmoene / expected-lite
  expected lite - Expected objects in C++11 and later in a single-file header-only library
  ☆426Updated last month
• cbeck88 / visit_struct
  A miniature library for struct-field reflection in C++
  ☆518Updated last week
• joboccara / NamedType
  Implementation of strong types in C++
  ☆781Updated 2 years ago
• tcbrindle / NanoRange
  Range-based goodness for C++17
  ☆359Updated 3 years 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 last week
• foonathan / type_safe
  Zero overhead utilities for preventing bugs at compile time
  ☆1,551Updated 4 months ago
• tcbrindle / span
  Implementation of C++20's std::span for older compilers
  ☆340Updated last year
• eliaskosunen / scnlib
  scanf for modern C++
  ☆1,101Updated 2 months ago
• martinmoene / span-lite
  span lite - A C++20-like span for C++98, C++11 and later in a single-file header-only library
  ☆499Updated 7 months ago
• stlab / libraries
  ASL libraries will be migrated here in the stlab namespace, new libraries will be created here.
  ☆665Updated 3 weeks ago
• TartanLlama / expected
  C++11/14/17 std::expected with functional-style extensions
  ☆1,568Updated last year
• mpark / variant
  C++17 `std::variant` for C++11/14/17
  ☆680Updated 2 years ago
• serge-sans-paille / frozen
  a header-only, constexpr alternative to gperf for C++14 users
  ☆1,356Updated this week
• boostorg / leaf
  Lightweight Error Augmentation Framework
  ☆317Updated last month
• beached / daw_json_link
  Fast, convenient JSON serialization and parsing in C++
  ☆480Updated last week
• mpark / patterns
  This is an experimental library that has evolved to P2688
  ☆667Updated last month
• 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
  ☆910Updated 2 months ago
• andreasbuhr / cppcoro
  A library of C++ coroutine abstractions for the coroutines TS
  ☆369Updated last month
• bloomen / transwarp
  A header-only C++ library for task concurrency
  ☆623Updated last year
• ldionne / dyno
  Runtime polymorphism done right
  ☆988Updated 3 years ago
• foonathan / lexy
  C++ parsing DSL
  ☆1,025Updated last week
• edouarda / brigand
  Instant compile time C++ 11 metaprogramming library
  ☆572Updated 2 years 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
  ☆429Updated 7 months ago
• ConorWilliams / libfork
  A bleeding-edge, lock-free, wait-free, continuation-stealing tasking library built on C++20's coroutines
  ☆627Updated this week