Method chaining and the finishing problem

问题

are there any approaches, given a statement like the following

First().Second();

to know from within First() whether/when Second() has executed?

Reference: http://martinfowler.com/dslwip/MethodChaining.html

回答1:

Second() will not execute until First() has completed, therefore this is impossible. All that First() can do is to violate fluency, thereby making it impossible for Second() to run.

来源：https://stackoverflow.com/questions/2146623/method-chaining-and-the-finishing-problem