Boolean short circuiting

Hello all

I was just messing about to test whether bmax short-circuits boolean expressions, and it seems that it does:

Function F1:Int()
	Print "F1"
	Return True
End Function

Function F2:Int()
	Print "F2"
	Return True
End Function

If F1() Or F2()
	Print "TRUE"
EndIf

Does anyone know if this is intentional, and if so can I rely on it always being in the language, and on left to right ordering like C?

It's just that it's so damned handy!


Ian C

Yes, it's intentional and yes, it will always evaluate left to right.

WOOOOOOOOOOOOOOOOW - i do not know this... i think this is the same how this works in C++...

test this in bb3d and bbmax. in bb3d this create a error - in blitzmax not!

nice

Type test
Field val:Int
EndType

Local xxx:test

If xxx<>Null And xxx.val=1 Then Print "COOL"
Print "OK"

That's very useful. Also, you can just use "If xxx" instead of "If xxx<>Null" I think.

that's old future.

Fantastic news Mark! Cheers for that.

And MrCredo it is very powerful and just the same as C++ works (and C# for that matter)... Rather than having to nest lots of if's for cheap over expensive operations, just do:

if CheapCollisionCheck() and ExpensiveCollisionCheck() ...

And you've done a handy bit of opimisation as ExpensiveCollisionCheck() won't be called if CheapCollisionCheck() was false :-)


Ian C