insoul · October 10, 2013 12:57 · Oct 10, 2013
diff --git a/gistfile1.rb b/gistfile1.rb
@@ -0,0 +1,37 @@
+class A
+ def yield_block
+  yield
+ end
+
+ def call_block(&block)
+  block.call
+ end
+
+ def eval_block(&block)
+  instance_eval(&block)
+ end
+end
+
+class B
+ def initialize
+  @a = A.new
+ end
+
+ def yield_test
+  @a.yield_block { puts self.class }
+ end
+
+ def call_test
+  @a.call_block { puts self.class }
+ end
+
+ def eval_test
+  @a.eval_block { puts self.class }
+ end
+end
+
+b = B.new
+b.yield_test #=> B
+b.call_test  #=> B
+b.eval_test  #=> A
+