including singleton methods with a module?

[Ferenc Engard]

Hi all!

I have a module, which defines several instance methods, and a singleton
(class) method also, which gets use one of the class methods of the
class which includes it.

I.e.:

-------------------------------------------
module Mod
def self.s1
do_something_with(helperfn)
end

def fn1
...
end

def fn2
...
end
end

class C
include Mod

def self.helperfn
...
end
end
-------------------------------------------

Using like this, I cannot call C.s1(). I suppose I could take out s1
something like this, am I right?

module Mod2
def s1
do_something_with(helperfn)
end
[...]
end

class C
include Mod
extend Mod2
end
-------------------------------------------

... Or maybe:

[...]
class C
include Mod
def self.s1() Mod.s1() end
end
-------------------------------------------

But, I would like to use my module in my classes as simply is "include
Mod". How can I do this?

Thanks,
Ferenc

 

[ts]

F> Using like this, I cannot call C.s1(). I suppose I could take out s1
F> something like this, am I right?

you can use ::append_features

svg% cat b.rb
#!/usr/bin/ruby
module Mod
module Intern
def s1
p "s1"
end
end

def fn1
p "fn1"
end

def self.append_features(mod)
super
mod.extend Intern
end
end

class A
include Mod
end

A.new.fn1
A.s1
svg%

svg% b.rb
"fn1"
"s1"
svg%


Guy Decoux

 

[Ferenc Engard]

Thanks, the good old append_features worked.

Ferenc