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Re^2: $1 not "freezing" in an addition

by ikegami (Pope)
on Dec 16, 2012 at 14:36 UTC ( #1009069=note: print w/replies, xml ) Need Help??

in reply to Re: $1 not "freezing" in an addition
in thread $1 not "freezing" in an addition

What happens? You might expect that you'd get output like this:

The example you gave has nothing to do with operand evaluation order and everything to do with operator precedence. Your code is equivalent to print(foo(+bar(), "\n"));, for which operand evaluation order *is* defined.

If you had used print foo() + bar(), "\n"; (or added the empty prototype, as you mentioned), then you would be relying on undefined operand evaluation order, yet it will give you the following on all machines:

foo just happened bar just happened 42

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