algebraic-data-traits

Writing Java in Javascript considered harmful

I made this because I am tired of seeing this:

function NotReallyAClass() {
    this._notReallyPrivate = 'bar';
    return this
}
 
NotReallyAClass.prototype = new SomeGodClass();
 
NotReallyAClass.prototype.crash = function () {
    ...
}

Stop it!

Usage

npm install -g sweet.js
npm install jmars/algebraic-data-traits
sjs -m adt/macros -m sparkler/macros -o index.js index.sjs

Dependencies

• Sweet.js
• ADT.js
• Light-Traits

trait Speaks {
    log(str) {
        console.log(str)
    }
}
 
trait Barks {
    requires log
 
    bark() {
        this.log('WOOF!')
    }
}
 
data Animal {
    Dog {
        name: String
    },
    Cat {
        name: String
    }
}
 
impl Dog {
    mixin Speaks
    mixin Barks
}
 
impl Cat {
    requires log
 
    mixin Speaks
    
    meow() {
        this.log('MEOW!')
    }
}
 
var fluffy = Cat.create({name:'fluffy'});
fluffy.meow() // MEOW!
 
// And sparkler.js compatible
fluffy match {
    case Cat{name} => console.log(name) // fluffy
}