Closure’s structure

I couldn’t find any docs on closures’ internal representation. Can anyone please explain how does it look like generally (in pseudocode maybe)?

The exact representation is unstable, and I guess that's intentional, since any explicit guarantee may inhibit optimizations and/or future features. Conceptually, every closure is a struct with all captured values as fields and Fn* implementations derived from body.

I remember someone recommending this link for some more explanation - can't check it right now myself, however.


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