order-pp
datatype99
order-pp | datatype99 | |
---|---|---|
5 | 29 | |
102 | 794 | |
- | - | |
0.0 | 3.5 | |
over 2 years ago | about 1 month ago | |
C | C | |
Boost Software License 1.0 | MIT License |
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order-pp
- Announcing the Hare programming language
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No Us Without You: elifdef and elifndef
Looping is already totally doable, up to a finite maximum number of iterations. Local variables and the like can be simulated through suitably clever preprocessor definitions and logic, too. The syntax and trickery you need to take advantage of it is thoroughly, thoroughly unpleasant though.
For anyone curious about the practicality of that sort of thing, A CPS macro continuation machine like https://github.com/rofl0r/order-pp/blob/master/inc/order/cm.... would give you about 18 quintillion loop iterations if my math was right; double the length of that file and you’d have more loop iterations than atoms in the universe.
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Have constexpr string mixins been proposed?
Macros can already accomplish this and more quite handily, using order-pp for example:
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datatype99: C99 with sum types, v0.1.0
Here is an example of the power of order: https://github.com/rofl0r/order-pp/blob/master/example/fibonacci.c
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?
awesome-c-preprocessor - A list of awesome C preprocessor stuff
metalang99 - Full-blown preprocessor metaprogramming
http_server - Pony library for building HTTP server applications.
zig - General-purpose programming language and toolchain for maintaining robust, optimal, and reusable software.
CSP - Compile-time LISP interpreter on C macro preprocessor
corrode - C to Rust translator
Cloak - A mini-preprocessor library to demostrate the recursive capabilites of the preprocessor
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