libsum
datatype99
libsum | datatype99 | |
---|---|---|
2 | 30 | |
4 | 1,206 | |
- | - | |
0.0 | 3.5 | |
about 9 years ago | 3 days ago | |
C | C | |
GNU General Public License v3.0 or later | MIT License |
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libsum
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Algebraic Data Types for C99
Definitely looks nicer and probably works better than my older attempt [1], but uses 9x more code and depends on the awesome buy scary Meta99 macro toolkit. I think libsum is a good intro if you want to see how algebraic data types work underneath.
[1] https://github.com/naasking/libsum
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Datatype99: C99 with Sum Types, v0.1.0
I created [something similar](https://github.com/naasking/libsum) awhile back:
SUM(foo) {
datatype99
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Future of high-level languages
Sum types and pattern matching have already been hacked together in a preprocessor macro in C; see https://github.com/Hirrolot/datatype99.
- So far there is no evidence that Rust adds any value here. And if C is missing certain features, they can be added.
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Does C have an equivalent to an algebraic data type?
It does not. There are people who have implemented such constructs in C code however, for example: https://github.com/Hirrolot/datatype99
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Memory Management Reference
Nice reference but with some strange bits:
> Algebraic data types are usually represented using a heap. Because of their non-uniformity, algebraic data types are more difficult to scan.
Using a heap??? We can represent ADTs using stack as well, that's what we usually do in C and Rust.
Shameless plug: https://github.com/Hirrolot/datatype99 (a library of mine that generates type-safe ADTs for pure C99).
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Pretty-Printable Enumerations in Pure C
I agree; I would especially not recommend abusing macros throughout an application codebase too much. Conceptually, Metalang99 is more of a (sub)language than a library, which also adds some entry barrier. Ideally, I see the application of Metalang99 being used "behind the scenes", e.g., encapsulated in separate code files/libraries such as Datatype99 and Interface99. This is what I (mostly) do in SmolRTSP.
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lipstick: a Rust-like syntax frontend for C
I've done something similar with Datatype99 and Interface99. They are like a macro eDSL that compiles to C. The first one features algebraic data types, the second one features interfaces.
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Any alternative to vala?
If you need a bit more high-level constructions, you can use the Datatype99 and Interface99 libraries. The former provides polymorphism over data, the latter -- over behaviour (I am the creator of these libraries).
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Syntatic Sugar that compiles to C
OP, you might find datatype99 and its sibling projects interesting, though they mostly leverage the C preprocessor without going all the way towards defining a new language.
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AST Implementation in C
You can use Datatype99 to represent your AST tagged union conveniently.
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Rust for Linux Redux
Compared to plain C, you have ADTs which help from day to day programming. You can bring them to C (https://github.com/Hirrolot/datatype99) but I don't know if the Linux guys would allow it.
What are some alternatives?
Cloak - A mini-preprocessor library to demostrate the recursive capabilites of the preprocessor
metalang99 - Full-blown preprocessor metaprogramming
zig - General-purpose programming language and toolchain for maintaining robust, optimal, and reusable software.
corrode - C to Rust translator
llvm-cbe - resurrected LLVM "C Backend", with improvements
epilepsy - A functional language for C99 preprocessor metaprogramming [Moved to: https://github.com/Hirrolot/metalang99]
lisp-preprocessor - Common lisp embedded template engine
smolrtsp - A lightweight real-time streaming library for IP cameras
rirc - A terminal IRC client in C
c3c - Compiler for the C3 language
interface99 - Full-featured interfaces for C99