use builtin for TracePoint.

Define TracePoint in trace_point.rb and use __builtin_ syntax.

prelude.rb

@@ -136,69 +136,6 @@ class IO
   end
 end
 
-class TracePoint
-  # call-seq:
-  #    trace.enable(target: nil, target_line: nil, target_thread: nil)    -> true or false
-  #    trace.enable(target: nil, target_line: nil, target_thread: nil) { block }  -> obj
-  #
-  # Activates the trace.
-  #
-  # Returns +true+ if trace was enabled.
-  # Returns +false+ if trace was disabled.
-  #
-  #   trace.enabled?  #=> false
-  #   trace.enable    #=> false (previous state)
-  #                   #   trace is enabled
-  #   trace.enabled?  #=> true
-  #   trace.enable    #=> true (previous state)
-  #                   #   trace is still enabled
-  #
-  # If a block is given, the trace will only be enabled within the scope of the
-  # block.
-  #
-  #    trace.enabled?
-  #    #=> false
-  #
-  #    trace.enable do
-  #      trace.enabled?
-  #      # only enabled for this block
-  #    end
-  #
-  #    trace.enabled?
-  #    #=> false
-  #
-  # +target+, +target_line+ and +target_thread+ parameters are used to
-  # limit tracing only to specified code objects. +target+ should be a
-  # code object for which RubyVM::InstructionSequence.of will return
-  # an instruction sequence.
-  #
-  #    t = TracePoint.new(:line) { |tp| p tp }
-  #
-  #    def m1
-  #      p 1
-  #    end
-  #
-  #    def m2
-  #      p 2
-  #    end
-  #
-  #    t.enable(target: method(:m1))
-  #
-  #    m1
-  #    # prints #<TracePoint:line@test.rb:5 in `m1'>
-  #    m2
-  #    # prints nothing
-  #
-  # Note: You cannot access event hooks within the +enable+ block.
-  #
-  #    trace.enable { p tp.lineno }
-  #    #=> RuntimeError: access from outside
-  #
-  def enable target: nil, target_line: nil, target_thread: nil, &blk
-    self.__enable target, target_line, target_thread, &blk
-  end
-end
-
 class Binding
   # :nodoc:
   def irb