Structural typing in Rust

Have you ever wanted to write a structurally typed function in Rust? Do you spend a lot of time and effort getting your Rust struct s just so , and want to DRY-out data access for common field paths without declaring a new trait and implementing it for each struct (let’s say, Cat and Dog both have a name: String field)? If so, read on.

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What this article is talking about isn’t structural typing, it’s nominal row typing. Rust already has a structural type, it’s the Tuple, but the examples and such they show is about a nominal row type. Very bad set of misnaming there… >.>

And yes, row typing is fun, though often not but sometimes can be zero-cost. ^.^