comp.lang.ruby

Stefan Lang

8/1/2008 11:37:00 AM

2008/8/1 Daniel Berger <djberg96@gmail.com>:
> Hi all,
>
> Courtesy of Yuki Sonoda, I stumbled across this:
>
> http://gist.githu...
>
> Looks pretty cool to me. Decoration plus AOP!

I've written a Python-style-decorators library, too.
(Code is here: http://repo.or.cz/w/de...)

Mainly because I don't like Ruby's private/protected methods.
So the library provides decorators to mark single method
definitions as private/protected/public:

require "decorate/private_method"

class Foo
private_method
def foo
...
end
end

Around/before/after methods are also possible:

require "decorate/around_decorator"

class MyObject
extend Decorate::AroundDecorator

around_decorator :log_time, :call => :log_time

def log_time(call)
t0 = Time.now
call.transfer
puts "#{call.receiver}.#{call.message}(#{call.args}) took
#{Time.now - t0} seconds"
call.result
end

log_time
def do_something(x)
sleep(rand(x))
end

end

m = MyObject.new
m.do_something(2)
m.do_something(1)

$ ruby around_example.rb
#<MyObject:0x7fa30c7c9c08>.do_something(2) took 0.998558 seconds
#<MyObject:0x7fa30c7c9c08>.do_something(1) took 1.9e-05 seconds

Stefan