cish VS xvm

The other day I was implementing an AST in Cish, when I realized I could leverage Cish's type-system to do the type checking for the AST automatically.

The latest release

Link to Github Release Page

Nice, although TeleClassic is a little different - it’s written ground up from just the stuff in .NETs stl, and I’m hoping this’ll provide the increased flexibility I want. Eventually I hope to use SuperForth, a language I wrote, as an in game scripting language which users can use to upload their own mini games.

Here’s the GitHub repo, and I recommend that you build with makefile.

machine.h

``` All of the above functions, with the exception of main, can be found in compiler.c.

I’m still working on SuperForth, a statically typed functional programming language. I’m currently working on reducing the memory footprint of the ast. Part of the reason it’s there is because the ast was designed before the virtual machine and compiler were implemented, so it’s kinda bloated at the moment

It’s pretty much high level c, but with anon functions and higher order functions. The original goal of the project was to provide higher level functional abstractions/a faster more portable runtime for running USACO solutions. Although it’s not nearly as fast as C, or even Java, it’s register based vm runs 3x as fast as python, with the same amount of portability. The compiler doesn’t apply many optimizations (it’s under 400 LOC), and the rest of the code is fairly short and simple to understand. check it out here

Have a look at the ecstasy library for the language definitions of these types.

2) Funky interfaces: This is an Ecstasy interface that declares abstract static members (e.g. functions), which can then be implemented on any class and overridden on any sub-class, such that they can be invoked by type (instead of this), and virtually resolved (late bound at runtime) based on the type known at compile time. The best known example, of course, is Hashable, because it has to guarantee that a type implements both equals() and hashCode() on the same class, and the implementation is tied to the type, and not to the this. (C# added a similar feature last year in version 11.)

I'm just going to warn you in advance that invocation is one of the hardest things in the compiler to make easy. In other words, the nicer your language's "developer experience" is around invocation, the more hell you're going to have to go through to get there. The AST nodes for Name( (NameExpression) and Invoke( (InvocationExpression) alone are 7kloc in the Ecstasy implementation, for example -- but the result is well worth it.

Ecstasy uses message passing automatically behind the scenes for asynchronous calls, but the message passing isn't visible at the language level (i.e. there is no "message object" or something like that visible). Basically, all Ecstasy code is executing on a fiber inside a service, and services are all running concurrently, so from any service realm to any service realm, the communication is by message.

Regarding Ecstasy, we did not set out to build a new language; we actually set out to solve a real world problem. Specifically, we wanted to be able to dramatically improve the density of workloads in data centers, by at least two orders of magnitude in the case of lightly used applications. Our initial goal was to create a runtime design that would support 10,000 stateful application instances on a single server. Let's call it the "a10k" problem 🤣 ... a tribute to the c10k problem from 1999. We refer to our goal as "zero carbon compute", i.e. we want to push the power and hardware cost for an application to as close to zero as possible; you can't reach zero, but you can get close. If we succeed, we will help reduce the electricity used in data centers over the next few decades by a significant percentage.

Generally, left to right, one character at a time. If you’re looking for example code, here’s a simple hand-built lexer.

Parts of Ecstasy are now implemented in Ecstasy. Here's the Lexer, for example.

Ecstasy

Ecstasy and the xvm were designed assuming an adaptive runtime compiler (similar in concept to the Hotspot compiler for Java), but not necessarily using a JIT.

A Future reference has the various capabilities that you'd imagine, taking lambdas for thenDo(), whenComplete(), etc. The reference, in the above example, is a local variable, so you just obtain it using the C-style & operator: