metalang99

Full-blown preprocessor metaprogramming (by Hirrolot)
Add to my DEV experience C C99 CPP Cpp11 programming-language Metaprogramming Macros embedded-language header-only Functional programming Fp functional-language Interpreter Language metalang99
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metalang99.readthedocs.io
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metalang99 reviews and mentions

Posts with mentions or reviews of metalang99. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-09-30.
  • How to convert an enum to string in C++
    4 projects | news.ycombinator.com | 30 Sep 2023
    There are also other approaches. Macro variants making use of `__VA_ARGS__` would be probably the best trade-off. If you want a slightly more ergonomic syntax, something like Metalang99 [1] will help (and the author even wrote a post about this exact subject [2]). Codegen is another option which may work better than other options depending on the situation and exact implementation strategy. And there is always the Reflection TS [3], which may or may not be incorporated to C++26...

    [1] https://github.com/Hirrolot/metalang99

    [2] https://hirrolot.github.io/posts/pretty-printable-enumeratio...

    [3] https://en.cppreference.com/w/cpp/experimental/reflect

  • Few lesser known tricks, quirks and features of C
    2 projects | /r/programming | 20 Feb 2023
    I went down the rabbit hole with C99 metaprogramming after reading through the list. For reference: https://metalang99.readthedocs.io/en/latest/, https://github.com/Hirrolot/metalang99
  • Boost:Unordered_flat_map
    2 projects | news.ycombinator.com | 19 Nov 2022
    Honestly I have to disagree. There is nothing particularly special about what Super Template Tetris(STT) is doing.

    At its core, template metaprogramming is just functional programming at compile time. STT is just a template and a runtime function which do the following:

    1, take an input via compile time flag (the `-D DIRECTION`)

    2. take a type input from an included header file containing the current state (`#include "current_game.h"`)

    3. via functional programming, compute the results of a single step of the game.

    4. specialise a single function using the results of step 3. this function prints the computed result to the screen and the computed game state to a file (`./current_game.h`).

    5. gcc/clang exits. compilation is complete.

    6. call the compiled binary.

    7. the binary runs the specialised function and prints the outputs.

    Sure it's fucky and you shouldn't do that in production but what sane individual is writing a piece of code that at runtime (after compiling) seeks out one of its own source files and modifies that file?

    To prevent this from being possible you'd have to remove runtime file IO from the language. The other potential solutions wouldn't work:

    1. Remove templates entirely: Still would be possible using https://github.com/Hirrolot/metalang99 which solely uses the preprocessor. Given that the pre-processor is literally just term substitution(a glorified copy/paste engine), if you removed that as well, you'd have to accept no form of metaprogramming at all.

    2. Remove the ability to #include other files: Could still be done by doing everything inline. `#include` is just copy-paste anyways so it's more an abstraction than anything else to the compiler and preprocessor, it's basically the same as if all the code was pasted into the same file.

    That leaves you with removing file IO. Without IO a programming language is basically useless, particularly as a systems programming language.

  • What does the ??!??! operator do in C?
    2 projects | news.ycombinator.com | 5 Oct 2022
  • Metalang99: Full-blown preprocessor metaprogramming for C/C++
    1 project | /r/cpp_instruments | 9 Aug 2022
  • Learning HTML was too hard so I made a compiler instead
    1 project | /r/programmingcirclejerk | 30 Jun 2022
    P.S. I wrote Metalang99 BTW.
  • How did you choose the name for your programming language?
    7 projects | /r/ProgrammingLanguages | 6 Jun 2022
    Metalang99, a metalanguage for C99. Simple :)
  • Rust is hard, or: The misery of mainstream programming
    9 projects | /r/rust | 2 Jun 2022
    Just wait until you see some other things by the same author, like https://github.com/Hirrolot/metalang99
  • Conditional preprocessor macro, anyone?
    3 projects | /r/C_Programming | 27 Apr 2022
    I did get a few great responses there as well, though. One was a link to this impressive piece of work: https://github.com/Hirrolot/metalang99/blob/master/examples/lambda_calculus.c
  • What are the minimal changes required to turn C into a functional programming language?
    1 project | /r/functionalprogramming | 18 Apr 2022
    Some preprocessor nonsense: https://github.com/Hirrolot/metalang99/blob/master/examples/lambda_calculus.c
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Hirrolot/metalang99 is an open source project licensed under MIT License which is an OSI approved license.

The primary programming language of metalang99 is C.

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