gistfile1.txt

require 'rubygems'
require 'kagemusha'

musha = Kagemusha.new(Time)
musha.defs(:now) { self.local(1984, 5, 11) }
musha.def(:+) {|other| other }

def foo
  puts "enter foo"
  p Time.now
  p Time.now + 60 * 60 * 24
  puts "leave foo"
end

foo
musha.swap {
  puts "enter musha.swap"
  p Time.now
  p Time.now + 60 * 60 * 24
  foo
  puts "leave musha.swap"
}

## enter foo
## Fri Nov 21 22:24:27 +0900 2008
## Sat Nov 22 22:24:27 +0900 2008
## leave foo
## enter musha.swap
## Fri May 11 00:00:00 +0900 1984
## 86400
## enter foo
## Fri May 11 00:00:00 +0900 1984
## 86400
## leave foo
## leave musha.swap