Hardcore metaprogramming in the wild

• gadgetron

  2 223 5.2 C++

  Gadgetron - Medical Image Reconstruction Framework

  

The project is Gadgetron, which I will be the first to admit is not the easiest code base to dive into. Surprisingly, this is not due to any of the template shenanigans, just poor documentation.

• json_struct

  6 371 8.0 C++

  json_struct is a single header only C++ library for parsing JSON directly to C++ structs and vice versa

• WorkOS

  workos.com sponsored

  The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.

  

• eventpp

  3 1,220 6.5 C++

  Event Dispatcher and callback list for C++

https://github.com/wqking/eventpp uses policy based design to configure behavior of its classes

• vif

  1 11 3.7 C++

  Easy, robust, and fast numerics in C++. (by cschreib)

I wrote a C++11 n-dimensional array library for data analysis during my PhD https://github.com/cschreib/vif

• slope

  1 0 10.0 C++

  Black box migration of data structures over RDMA (by farnasirim)

Mine is over at https://github.com/farnasirim/slope, code for my M. Sc. thesis. Main purpose was to make a C library RAII friendly. I wrote about it here: https://blog.farnasirim.com/2020/02/down-rabbit-hole-template-interface.html

• MongoDB

  248 25,418 10.0 C++

  The MongoDB Database

  

It is probably easiest to understand if I describe it from the outside-inwards. So we have a YAML data file that describes all of our named error codes and assigns some of them in a many-to-many fashion to error categories. At the other end, users can catch ExceptionFor to catch a specific code, or ExceptionForCat to catch all errors in a given category. The yaml file is combined with some template files written using python's Cheetah3 to produce a header, a cpp, and a js file we use for testing.

• unconstexpr-cpp20

  1 100 0.0 C++

  C++20 implementation of mutable constexpr expressions

Stateful metaprogramming via friend injections gives us the ability to capture and retrieve a compile time state. Thus, it is possible to create compile time counters, mutable constant expressions https://github.com/DaemonSnake/unconstexpr-cpp20, static reflection ```cpp template struct flag { friend consteval auto member_type(flag); };

• InfluxDB

  www.influxdata.com sponsored

  Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

  

• lexy

  19 947 7.7 C++

  C++ parsing DSL

I've been going over lexy (https://github.com/foonathan/lexy) with that list in mind:

• loki

  1 236 10.0 C++

  Discontinued A C++ Template library, developed by Andrei Alexandrescu, the author of the book Modern C++ Design. (by dutor)

• vrm_pp

  1 13 10.0 C++

  Small C++ preprocessor library

I am using a combination of preprocessor metaprogramming (via my vrm_pp library and C++17 structured binding abuse (via Boost.PFR) to implement an auto-serializing/auto-deserializing networking protocol for my game, Open Hexagon. You can see the relevant code here:

• SSVOpenHexagon

  20 605 6.4 C

  C++20 FOSS clone of "Super Hexagon". Depends on SSVStart, SSVEntitySystem, SSVLuaWrapper, SSVMenuSystem, JSONcpp, SFML2.0. Features JSON/LUA customizable game files, a soundtrack by BOSSFIGHT, pseudo-3D effects.

• seqan3

  1 386 8.9 C++

  The modern C++ library for sequence analysis. Contains version 3 of the library and API docs.

  

The SeqAn bioinformatics algorithms library includes quite advanced TMP. SeqAn basically provides an object oriented library of algorithms, but with compile-time (rather than runtime) dispatch. In other words, it implements compile-time OOP.

• daw_json_link

  21 424 8.6 C++

  Fast, convenient JSON serialization and parsing in C++

• sol2

  20 3,935 3.9 C++

  Sol3 (sol2 v3.0) - a C++ <-> Lua API wrapper with advanced features and top notch performance - is here, and it's great! Documentation:

Next to some already said examples: sol2 v3.0 https://github.com/ThePhD/sol2 - a Lua to C++ "header only" bridge...

• arduino_modern

  2 19 0.0 C++

  Modern C++ arduino library

• cpp-sort

  1 597 7.1 C++

  Sorting algorithms & related tools for C++14

I've got that cursed piece of code where I use multiplication to affect overload resolution: https://github.com/Morwenn/cpp-sort/blob/develop/include/cpp-sort/adapters/hybrid_adapter.h

• tight_pair

  1 22 4.9 C++

  A compressed pair for C++17

There's also this doomed project with lots of metaprogramming and weird tricks where it took me more than 1500 lines of code to implement a slightly optimized compressed pair: https://github.com/Morwenn/tight_pair

• SaaSHub

  www.saashub.com sponsored

  SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

  

Suggest a related project