property short cut for read-ony instance access, but....

[Gene Angelo]

Hello,

Is there a short cut for creating a property that has read-only access
from instance variables and read/write access for derived classes?

Was looking for something like...

attr_reader rompt
attr_writer protected rompt

or am I doomed to do it this way...

#...
def prompt
@prompt
end

def prompt=(value)
@prompt=value
end
protected rompt=
#...

 

[Robert Klemme]

Hello,

Is there a short cut for creating a property that has read-only access
from instance variables and read/write access for derived classes?

Was looking for something like...

attr_reader rompt
attr_writer protected rompt

or am I doomed to do it this way...

#...
def prompt
=A0 @prompt
end

def prompt=3D(value)
=A0 @prompt=3Dvalue
end
protected rompt=3D
#...

With a little meta programming you can do

class Module
def attr_protected *names
attr_accessor *names
protected *names.map {|n| "#{n}=3D"}
end
end

and use it like

class A
attr_protected :foo, :bar
end

Kind regards

robert

--=20
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/