From: "popoxee (Bruce Metz)" <popoxee@...>
Date: 2013-10-30T10:00:48+09:00
Subject: [ruby-core:58073] [ruby-trunk - Feature #9060][Open] "Assignment"	operator overloading


Issue #9060 has been reported by popoxee (Bruce Metz).

----------------------------------------
Feature #9060: "Assignment" operator overloading
https://bugs.ruby-lang.org/issues/9060

Author: popoxee (Bruce Metz)
Status: Open
Priority: Normal
Assignee: 
Category: 
Target version: 


I understand assignment in ruby is assigning an object to the variable. However there are other cases we need to use assignments. For example:

(({class Foo
end

class Bar < Foo
end

f = Foo.new
b = Bar.new
//Some operations on b}))

Now we want f to contain the same data as b. But if we use f = b, f will not be Foo any more.
Or we can define a method like ((*Foo##loadFromBar*)), but Foo is the super class of Bar and usually defined before Bar...

Can we have something like:
(({f := b}))
so that f will have the same shared data with b?

And we can even load data from other classes by overloading this operator:

(({class Foo
  def :=(f)
    @data = f
  end
end
f = Foo.new
f := 2.2}))

We can always achieve this by defining a named method, but this operator can provide some syntax sugar and convenience.


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