ATS-Postiats
c3c
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ATS-Postiats | c3c | |
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18 | 24 | |
349 | 1,283 | |
- | 2.6% | |
0.0 | 9.6 | |
about 1 year ago | 8 days ago | |
ATS | C | |
GNU General Public License v3.0 or later | GNU Lesser General Public License v3.0 only |
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ATS-Postiats
- What is the most feature-rich programming language
- Evolutie limbaje in industrie
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The Little Typer – The Beauty of Dependent Type Systems, One Step at a Time
This is one of my two favorite books in The Little ...er series. The other is The Rational Schemer. These are two of the most advanced books in the series.
The Little Typer provides an introduction to dependent types. These can by used to guarantee things like "applying 'concat' to a list of length X and list of length Y returns a list of X+Y". It is also possible, to some extent, to use dependent types to replace proof tools like Coq. Two interesting languages using dependent types are:
- Idris. This is basically "strict Haskell plus dependent types": https://www.idris-lang.org/)
- ATS. This is a complex systems-level language with dependent types: http://www.ats-lang.org/
The Rational Schemer shows how to build a Prolog-like logic language as a Scheme library. This is a very good introduction to logic programming and the implementation of backtracking and unification is fascinating.
This is an excellent series overall, but these two books are especially good for people who are interested in unusual programming language designs. I don't expect dependent types or logic programming to become widely-used in the next couple generations of mainstream languages, but they're still fascinating.
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Does Rust have any design mistakes?
Not being ATS
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The case against an alternative to C
> any safety checks put into the competing language will have a runtime cost, which often is unacceptable
This is completely wrong. The best counterexample is probably ATS http://www.ats-lang.org which is compatible with C, yet also features dependent types (allowing us to prove arbitrary statements about our programs, and check them at compile time) and linear type (allowing us to precisely track resource usage; similar to Rust)
A good example is http://ats-lang.sourceforge.net/DOCUMENT/ATS2CAIRO/HTML/c36.... which uses the Cairo graphics library, and ends with the following:
> It may seem that using cairo functions in ATS is nearly identical to using them in C (modulo syntatical difference). However, what happens at the level of typechecking in ATS is far more sophisticated than in C. In particular, linear types are assigned to cairo objects (such as contexts, surfaces, patterns, font faces, etc.) in ATS to allow them to be tracked statically, that is, at compile-time, preventing potential mismanagement of such objects. For instance, if the following line:
val () = cairo_surface_destroy (sf) // a type error if omitted
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Security advisory: malicious crate rustdecimal | Rust Blog
For a low level language in which you actually need to prove that your code doesn't cause UB, see http://www.ats-lang.org/
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Why is ATS not considered in the design of modern system languages?
Here's the homepage fo the language: http://www.ats-lang.org/. The trick to finding results about with google is to search "ATS programming language".
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ESPOL, NEWP, Mesa, Cedar, Modula-2, Modula-2+, Modula-3, Oberon, Oberon-2, Component Pascal, Active Oberon, D, C#, F#, VB, Ada, Go, Swift, just a few examples.
In SPARK's case, you have to state your invariants in even greater precision than in Rust, and naturally it has worse inference. That's okay, the same happens in a certain language with Atrocious Type Syntax.
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What are all the situations you can't do compile time type-checking when building a programming language?
Yes, things like mentioned in the post can be expressed and checked statically, as demonstrated by languages like Idris and ATS. ATS might be even more relevant as it's an imperative language too, it can get rather low-level (like talking about properties of C runtime functions) while proving required properties statically, and it includes a solver for certain amount of arithmetics so that you don't need to prove obvious mathematical identities to the compiler. http://www.ats-lang.org/
- Is it possible to make a functional programming language that is equivalent of Rust in terms of performance and resource efficiency?
c3c
- Odin Programming Language
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Show HN: The C3 programming language reaches feature-stabiliy
C3, "The C-like for people who like C" just reached v0.5, marking its feature-stable release: https://c3.handmade.network/blog/p/8824-say_hello_to_c3_0.5
Feature stability ensures that version 0.5 will undergo bug fixes and maintenance separately from the main branch, providing projects with a stable compiler version to work with.
Try it out in the browser https://learn-c3.org
Github: https://github.com/c3lang/c3c
If you appreciate C, then maybe this is a language you'll enjoy. Dive into the documentation at https://c3-lang.org to view examples and read more in depth about the language.
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Give me your feature ideas for a C-like
Tuples are being discussed, although I am unsure if it would be sufficiently useful. (Discussion here and here if you want to leave some thoughts)
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Is there a static version of lld available? Or do I have to build lld from scratch?
I've been trying to build c3lang on my local machine. The problem is that it requires static files for both llvm and lld. Now, the static files for llvm have been provided (llvm-static), but not for lld, at least that's what I think. I thought that maybe I've made a mistake somewhere by not search the package thoroughly. I just wanted to know what package will install static files for lld.
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Give me your best (and worst) ideas for a C-like language
So (preferably) have a little look at the language (https://c3-lang.org/) and maybe try it out (https://learn-c3.org/) and then file whatever issue you want: https://github.com/c3lang/c3c/issues/new
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C3 is now at 0.4.0
Like this: https://github.com/c3lang/c3c
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Learn Enough C to Survive
> I wish we had C+: C + a few niceties (and not C ++ everything). There's a whole bunch of newer languages aiming at the space C is sitting in, but with a few additions C could be much more ergonomic without having to invent an entire new language.
I’ve made a pre-processor for C to add some things I miss, although it is currently limited to what can be done without type information and has to keep compatibility with existing C syntax: https://sentido-labs.com/en/library/cedro/202106171400/
There is another language call C3 that “is a C-like language striving to be an evolution of C, rather than a completely new language”: https://github.com/c3lang/c3c
If you have the time, I’d like to hear which things you miss in C. There might be something I did not imagine that could be added to Cedro.
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Are Hoistings Possible for C++?
Off the top of my head, cc99 and c3 are two C dialects that both can do this.
- C3C - Compiler for the c3 language
- The case against an alternative to C
What are some alternatives?
lean4 - Lean 4 programming language and theorem prover
durin - the Dependent Unboxed higher-oRder Intermediate Notation
chapel - a Productive Parallel Programming Language
librope - UTF-8 rope library for C
cicada - An old-school bash-like Unix shell written in Rust
poprc - A Compiler for the Popr Language
virgil - A fast and lightweight native programming language
SinScheme - Sinister's Scheme Compiler!
HVM - A massively parallel, optimal functional runtime in Rust
lisp - A lisp JIT compiler and interpreter built with cranelift.
coq - Coq is a formal proof management system. It provides a formal language to write mathematical definitions, executable algorithms and theorems together with an environment for semi-interactive development of machine-checked proofs.
cone - Cone Programming Language