function allowingNULL(object $val = NULL) function preventNULL(object $val)
I like this idea even though it's abusing the default value syntax.
What's a bit weird is something like
function foo(object $obj = NULL, $mandatoryparameter) { ... }
where people will wonder why there is a default value even though they can't omit the parameter really. But personally I could live with that.
- Chris
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