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MaikKlein/do?

Created May 23, 2013 16:42
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do?
fn unwrap(f: &fn() -> Option<int>) -> Option<int>{
f()
}
fn main() {
let c = unwrap(|| {
let a = Some(2);
let b = Some(3);
a + b
});
println(fmt!("%?", c));
}
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