Evaluate argument lazily with escaping autoclosure

[pyrtsa]

This should fix 99dadd3#diff-360d1675e0d2b6a0544b37d913f5e599, though I'm not 101% sure this solution works in all possible circumstances. Discuss!

[robrix]

It does, yes. That said, I’m persuaded by @jspahrsummers that @autoclosure(escaping) is unnecessarily obtuse for this purpose anyway.

[pyrtsa]

Agreed. In that case, the README should be updated here:

var memos = 0
let implicitClosure = Memo(++memos)

[robrix]

Oof, good catch. I’ll tackle that; thanks very much for the PR!

[robrix]

Fixed in 77860c8.