[M3devel] quake and/or "short circuit"

[Jay K]

It would have been nice for and/or to short circuit in quake like they do in C.


Code like:

if not defined("TARGET")
  readonly TARGET = "I386_FREEBSD"
else
  if not equal(TARGET, "FreeBSD4")
    readonly TARGET = "I386_FREEBSD"
  end
end


is better written as:
if not defined("TARGET") or not equal(TARGET, "FreeBSD4")
  readonly TARGET = "I386_FREEBSD"
end

but that isn't allowed because equal() will complain that TARGET isn't defined.

It probably can't fixed though, due to e.g.:

if TRUE or DoSomething()
  ...
end


would be broken.


perhaps
OR and AND
or short_circuit_and
or and_shorted
or and_short_circuit
or and_early_out
or and_early
or "&&"
or something...


Or I should just rewrite so much quake in Modula-3...


 - Jay
 		 	   		  
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