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CoffeeScriptでObject.definePropertyを使ってみた

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CoffeeScript Issue #1165によるとObject.definePropertyは当分実装されない模様。少々強引ですが面白やり方を見つけましたのでここに記入します。

ぶっちゃけObjectice-Cの@propertyみたいに@synthesis出来たらいいなって思ってます。

Function::property = (prop, desc) ->
  Object.defineProperty @prototype, prop, desc

class Fuga
  constructor: (@_foo='bar') ->
  @property 'foo',
    get: -> @_foo
    set: (foo) -> @_foo = foo

f = new Fuga 'Nyaa'
console.log p.foo
f.foo = 'Nyo'
console.log p.foo

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