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submitted 2 years ago by testeronious@lemmy.world to c/rust@programming.dev

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[–] onlinepersona@programming.dev 0 points 2 years ago (1 children)

What am I missing? Seems like it just puts the parameter in Some?

[–] Ephera@lemmy.ml 21 points 2 years ago* (last edited 2 years ago) (1 children)

You must've read that wrong.

The first example, but formatted differently:

let value = "My name is Rho.";
let result = unformat!("My {} is {}.", value);

Now, result contains:

Some(("name", "Rho"))

...because the words "name" and "Rho" in value happened to be at the position of the {}-slots in the unformat!()-pattern.

[–] onlinepersona@programming.dev 5 points 2 years ago

Oh yeah! Thanks. It's been a long day.