Recorder

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

Methods

__call__ inspect method_missing new

Public Class methods

new( msg=nil )

[Source]

    # File lib/more/facets/recorder.rb, line 83
83:   def initialize( msg=nil )
84:     @msg = msg
85:   end

Public Instance methods

__call__( orig )

[Source]

     # 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

inspect()

[Source]

    # File lib/more/facets/recorder.rb, line 87
87:   def inspect
88:     "<Recorder #{@msg.inspect}>"
89:   end

method_missing( sym, *args, &blk )

[Source]

     # File lib/more/facets/recorder.rb, line 103
103:   def method_missing( sym, *args, &blk )
104:     object_class.new( [ sym, self, *args ] )
105:   end