Difference between revisions of "Return"

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(clarify a little more)
m
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A '''return''' command is similar to '''[[break]]''' in that it stops code after the '''return''' from executing and thus can be used to exit a state early. However, a '''return''' proparates along a call chain of [[state]]s and terminates the execution of the innermost [[event]] or [[actor]] code. Thus, when the following code snippet is run, only quote 125 ("SPAWNED LIGHTEFFECT1") is displayed.
A '''return''' command is similar to '''[[break]]''' in that it stops code after the '''return''' from executing and thus can be used to exit a state early. However, a '''return''' proparates along a call chain of [[state]]s and terminates the execution of the innermost [[event]] or [[actor]] code. Thus, when the following code snippet is run, only quote 125 ("SPAWNED HEAVYHBOMB") is displayed.


  '''definequote''' 125 SPAWNED HEAVYHBOMB
  '''definequote''' 125 SPAWNED HEAVYHBOMB

Revision as of 12:10, 23 December 2012

A return command is similar to break in that it stops code after the return from executing and thus can be used to exit a state early. However, a return proparates along a call chain of states and terminates the execution of the innermost event or actor code. Thus, when the following code snippet is run, only quote 125 ("SPAWNED HEAVYHBOMB") is displayed.

definequote 125 SPAWNED HEAVYHBOMB
definequote 126 RAN EVENT_EGS
definequote 127 RAN TEST STATE

state teststate1
    return
    userquote 127
ends

onevent EVENT_EGS
    ifactor HEAVYHBOMB
    {
        state teststate1  // after teststate1's return, return from EVENT_EGS!
        userquote 126
    }
endevent

onevent EVENT_LOADACTOR
    ifvare THISACTOR 0
    {
        // the concrete actor is irrelevant, only placeholder
        spawn HEAVYHBOMB  // --> EVENT_EGS
        userquote 125
    }
endevent

Replacing the return by a break in the above example would lead to quotes 126 and 125 being displayed (in that order) at run time.