Alternative to Exit label

BlitzMax Forums/BlitzMax Programming/Alternative to Exit label

Curtastic

(Posted 2005) [#1]

I don't like it when you exited to a label, it is hard to tell if you exited or not. (the loop might have finished on its own)

Print "Hello"
'find target
Area
	For y=1 To 20
		For x=1 To 10
			If grid_good(x,y) Then ExitArea
		Next
	Next
	'spot not found?
	RuntimeError "good place not found. oh no."
EndArea


'move
Print "moving to good target."

This is similar to putting your code in a function, exept that you dont have to pass every local to it. And you dont have to name your loop...

We can do this right now:

Strict

'find target
Local y
#label10
For y=1 To 20
	For Local x=1 To 10
		If grid_good(x,y) Then Exit label10
	Next
Next
'did we exit?
If x=11 And y=21 Then 'error 'x' not found because it shouldnt get accessed here.
	RuntimeError "good place not found. oh no."
Else
	'move
	Print "moving to good target"
EndIf

The problem with ExitArea is that you couldn't exit out of 2 nested areas. that would be messy anyways. You can do it with exit label.