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'Evolving' - adaptive object evolution. Soar above classes, prototypes and mixins
###
Copyright (c) 2015 Michele Bini
This library is free software: you can redistribute it and/or modify
it under the terms of the version 3 of the GNU General Public License
as published by the Free Software Foundation.
This library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
###
Define 'Evolving' as a generic base class
class Evolving
Define the 'evolve' method, that applies 'evolution' to the current class.
It returns an ordinary Javascript class you can instantiate with 'new'.
Technically, since Javascript objects have prototypal inheritance, "classes" are just constructors.
evolve: (evolution)->
x = ->
x.prototype = @
The object generated by `new` may have the constructor set to x.prototype.constructor, instead of x. So, we set the constructor right back to x.
(y = new x).constructor = x
Set defaults for the new class:
x.evolution = evolution
x.prototype = y
Finally let the evolution happen, and return the new class
evolution.call(y).constructor
Export 'Evolving' if necessary
exports?.Evolving = Evolving
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