Class | Recorder |
In: |
lib/more/facets/recorder.rb
|
Parent: | Object |
Recorder is similar essentially a method probe. It records everthing that happens to it, building an internal parse tree. You can then pass a substitute object and apply the recoding to it. Or you can utilize the parse tree.
The only limitation of Recorder is with special operators, like if, &&, ||, etc. Since they are not true methods they can‘t be recorded. (Too bad for Ruby.)
class Z def name ; 'George' ; end def age ; 12 ; end end z = Z.new r = Recorder.new q = proc { |x| (x.name == 'George') & (x.age > 10) } x = q[r] x.__call__(z)
produces
true
# File lib/more/facets/recorder.rb, line 91 91: def __call__( orig ) 92: return orig unless @msg 93: 94: sym = @msg[0] 95: args = @msg[1..-1].collect do |a| 96: Recorder === a ? a.__call__(orig) : a 97: end 98: obj = args.shift 99: 100: obj.__send__( sym, *args ) 101: end
# File lib/more/facets/recorder.rb, line 87 87: def inspect 88: "<Recorder #{@msg.inspect}>" 89: end