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• Iterator Blocks, Part Five: Push vs Pull

  A while back I posted some commentary I did for the Scripting Summer Games where I noted that there is an isomorphism between "pull" sequences and "push" events. Normally you think of events as something that "calls you", pushing the event arguments at Read More... Posted Thursday, July 23, 2009 7:05 AM by Eric Lippert | 13 Comments Filed under: C#, Language Design, Iterators, exception handling

• Iterator blocks Part Four: Why no yield in catch?

  Now that you know why we disallow yielding in a finally, it’s pretty straightforward to see why we also disallow yielding in a catch. First off, we still have the problem that it is illegal to “goto” into the middle of the handler of a try-protected region. Read More... Posted Monday, July 20, 2009 6:44 AM by Eric Lippert | 14 Comments Filed under: C#, Language Design, Iterators, exception handling

• Iterator Blocks, Part Three: Why no yield in finally?

  There are three scenarios in which code could be executing in a finally in an iterator block. In none of them is it a good idea to yield a value from inside the finally, so this is illegal across the board. The three scenarios are (1) normal cleanup, Read More... Posted Thursday, July 16, 2009 6:18 AM by Eric Lippert | 10 Comments Filed under: C#, Language Design, Iterators, exception handling