A single word on a line is never wrapped in parens, though it may close parens inserted in a previous line.
I keep thinking there's an example similar to this one of yours that won't parse correctly unless you explicitly wrap the if in parens:
if (foo)
(bar)
(qux)
But I can't think of a counter-example :)
Even if the algo is unambiguous this approach will fail if people can't easily wrap their heads around what it will do. But that's a matter of taste, I suppose.
