Jemgine

DeyjaScript 12 : Closures

Sun, 30 Oct 2011 19:37:00 +0000

The next step after lambda functions is obviously closures. Without closures, I couldn't write code like this.

var view = new View(world, new Rectangle(0,0,800,600));
bindKey("W", [void v] { view.panCamera(0.0, 1.0, 5.0); }, true);

Closures allow lambdas to use variables local to the function they are declared in. To...

DeyjaScript 11 : Enough blather; time to actually use it.

Tue, 18 Oct 2011 23:53:00 +0000

I mentioned last time that I might start integrating this scripting language with that other thing, and I did. Nothing evolves a library faster than actually using it. First, I designed the interface I wanted scripts to see. The first thing I want to use...

DeyjaScript 10 : Lambdas

Tue, 11 Oct 2011 13:13:00 +0000

I started thinking, okay, I've written this thing. Now how can I actually use it? Wasn't I supposed to be making a mud engine? Yeah, well, I already don't want to anymore. Instead, I'm going to use DeyjaScript in this thing, http://www.gamedev.n...ony-build-demo/ . I'll use it to implement an...

Gnome Colony Build Demo

Sat, 08 Oct 2011 04:32:00 +0000

So, I think this is finally ready to show people.

Here's a screenshot I took.

Here's something someone else made.

And here is the actual thing...!
GCBuildDemo.zip (710.09K)
Number of downloads: 13

DeyjaScript 9 : Arrays and Generics

Sun, 02 Oct 2011 01:55:00 +0000

For arrays in this language, I had two requirements. First, they had to be dynamically sized, and second, they had to be type-safe. But, when I want about trying to actually implement them, I discovered that my current implementation of the type system could handle only one or the other. I could create arrays, but like in C++, the array itself...

DeyjaScript 8 : Modules

Tue, 27 Sep 2011 01:56:00 +0000

I try to keep the ultimate goal of this project, to be used in a mud engine, in mind when I decide what features to implement next. So I decide that modules are next. Actually compiling a self-contained module is straightforward. I changed the 'ExecutionContext' into a 'ScriptEngine'. I gave it a global scope. Each module will get...

DeyjaScript 7 : Scope fixes and Inheritance

Fri, 23 Sep 2011 18:20:00 +0000

This entry will be formatted as a series of features, and some notes on their implementation.

First, I created a proper scope stack. This allowed me to fix the problem of variables 'leaking out of' blocks. Code like this used to be possible.

if (condition) {
	int x = 5;
}
x = 6; //Just fine!

It takes more work to...

Source for the previous entry

Wed, 21 Sep 2011 13:07:00 +0000

I fixed those design flaws I talked about in http://www.gamedev.n...d-design-flaws/ so here is the source. There isn't actually anything to say about it, as it doesn't do anything it didn't already do. Except string literals.

Some changes
-Functions now get their own chunk of...

DeyjaScript 6 : Member Variables and Design Flaws

Mon, 19 Sep 2011 12:31:00 +0000

Installment six, in which I implement member variables and the whole thing starts to unravel. I always find that there's a certain point in a project where the abstractions that I've chosen suddenly show their flaws, and this is that point. A series of kludges, rather than proper design, makes this work.

Declaring member variables is...

DeyjaScript 5 : Objects and methods

Sun, 18 Sep 2011 13:58:00 +0000

I have to say, after getting to the fifth installment in about a week, that I like this style of 'journaling' 'tutorials'. I'm not writing what you should do to create a scripting language, instead I'm just saying what I have done. It also forces me to find a single isolated feature and implement it. I did something similar...