Zaggen · February 23, 2017 16:18
diff --git a/traits-decorator.ts b/traits-decorator.ts
 declare const _: _.LoDashStatic

 export function traits(...traitsList) {
  return function decorator(constructor: any) {
    const mergedTraits =  _.extend.apply(_, traitsList)
    const {prototype} = constructor
    const {__proto__} = constructor.prototype
    const prototypeClone =  _.clone(prototype) // We use a clone to avoid getting properties on the proto chain
    constructor.prototype = _.extend(prototype, mergedTraits, prototypeClone)
    constructor.prototype.constructor = constructor
    constructor.prototype.__proto__ = __proto__
    constructor.prototype._traits = mergedTraits
  }
 }


 // Usage
 /*
 import {movable, killable} from 'game-traits'

 @traits(movable, killable)
 class Player {
  // We can override traits inherited methods (kill comes from killable) and call the original method via this._traits
  kill(): void{
    console.log('Player is about to die')
    this._traits.kill.call(this) // Unless you know for sure that the traitFn does not have side effects use with .call or .apply
  }
 }
 */
	declare const _: _.LoDashStatic

	export function traits(...traitsList) {
	return function decorator(constructor: any) {
	const mergedTraits = _.extend.apply(_, traitsList)
	const {prototype} = constructor
	const {__proto__} = constructor.prototype
	const prototypeClone = _.clone(prototype) // We use a clone to avoid getting properties on the proto chain
	constructor.prototype = _.extend(prototype, mergedTraits, prototypeClone)
	constructor.prototype.constructor = constructor
	constructor.prototype.__proto__ = __proto__
	constructor.prototype._traits = mergedTraits
	}
	}


	// Usage
	/*
	import {movable, killable} from 'game-traits'

	@traits(movable, killable)
	class Player {
	// We can override traits inherited methods (kill comes from killable) and call the original method via this._traits
	kill(): void{
	console.log('Player is about to die')
	this._traits.kill.call(this) // Unless you know for sure that the traitFn does not have side effects use with .call or .apply
	}
	}
	*/