Coroutine

• Coroutine
• https://blogs.msdn.microsoft.com/vcblog/2015/11/30/coroutines-in-visual-studio-2015-update-1/
• http://www.crystalclearsoftware.com/soc/coroutine/coroutine/tutorial.html
• Usage
  • Acquire additional action during a normal action
    • Choose where to put minion
    • Choose spell target
    • Choose One effect
    • Discover effect
• Alternatives
  • Hand-crafted state machine
  • Pass a functor/callback to acquire additional action parameters
• Note
  • Coroutine saved state cannot be copied
    • So, the game state cannot be copied during a coroutine call
  • We can still make it copyable
    • Save the last-copyable state 'State A'
    • Save all the function calls after 'State A'
• And make it comparable
  • In the resumable functions...
    • All local variables influences engine/decisions should be on the state obejct
• Final decision
  • Pass a functor/callback to provide additional action parameters
    • Coroutine needs to run on a separated stack, which might slow things down
    • It's not really necessary to use the coroutines. We can do all stuffs using callbacks