This fascinating snippet of Rust does some tricky work with no allocations or copying, type- and memory-safely: gist.github.com/Aatch/5734372
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it at least allocates the Some() on line 59, right? Very cool, though.
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Ah, sorry, I wasn’t counting stack allocations because they’re not what I normally worry about. Yes.
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hm, how does that Some avoid being heap allocated? It gets returned from the get_string call. (I don't know Rust well).
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The Some wraps a reference to an inner pointer of the json argument. The “lifetime parameters” ensure the safety of that trick.
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