Scurry

Scurry is an dynamically typed component-based object-oriented language, written in Rust. Scurry is still under active development and thus more features will be available soon.

...

That was a mouthful. So what can it actually do?

Overview

Here are some general features: ``` // Basic arithmetic 1 + 1; 2 * 2; 3 / 3; 4 - 4; 5 % 5;

// Control flow for i in [1, 2, 3] { // Dynamically sized arrays println(i); }

// Loops include break and continue! while True { println("This is infinite."); }

if True { println("True"); } elif 3 != 3 { println("This makes no sense!!"); } else { println("False"); }

// Variable assignment too x = 5555; switch x { case 5 { println("Why would this be true"); }

default {
    println("The last resort");
}

}

// First class functions with lexical scoping fn thiscoolfunction(x) { return fn() { return x; }; } println(thiscoolfunction(3)());

// Data structures array = [1, 2, 3]; array.push("cool!");

map = {"key": 4, 99: True}; map[42] = "value"; ```

These are pretty nice, but the main feature of this language are components. Components designed are small reusable objects that can share behavior without sharing state. As shown in this trivial example: ``` decl ThreeNumbers { // These are the possible fields of ThreeNumbers. Fields are always // private. field1 field2 field3

// $ prefixes special methods, this one is called when an instance is made
fn $new(self, field1, field2, field3) {
    self.field1 = field1;
    self.field2 = field2;
    self.field3 = field3;
}

// `exp` denotes public methods
exp fn sum(self) {
    return self.field1 + self.field2 + self.field3;
}

}

// New instance of ThreeNumbers numbers = ThreeNumbers(50, 5, 500); println(numbers.sum());

decl ThreeNumbersAndString { number1 number2 number3 string

// Calls ThreeNumbers's $new at the end of this component's $new, passing
// these fields
[ThreeNumbers] {
    number1
    number2
    number3
}

fn $new(self, n1, n2, n3, string) {
    self.number1 = n1;
    self.number2 = n2;
    self.number3 = n3;
    self.string = string;
}

exp fn get_string(self) {
    return self.string;
}

}

// strnums cannot access any state from ThreeNumbers! Only methods strnums = ThreeNumbersAndString(50, 5, 500, "hello!"); println(strnums.sum()); println(strnums.get_string()); ``` This language encourages small components with very little state that can be modified and small API surface areas.

Installation

Currently, Scurry can be downloaded with the following methods.

Cargo

Must have the Rust toolchain installed.

$ cargo install scurry

Manual

Must have the Rust toolchain installed.

zsh $ git clone https://github.com/dzfrias/scurry $ cd scurry $ cargo build --release $ # Now put the binary wherever you'd like!

License

Scurry is licensed under the MIT License.