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Creating your own custom derive macro (cetra3.github.io)

submitted 1 year ago by [email protected] to c/[email protected]

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[–] [email protected] 2 points 1 year ago (1 children)

Oh nooooo I've been discovered posting to reddit! 😯 We need to really post more rust content here, there's barely anything.

Yeah I just used anyhow instead of thiserror as that's what I'm using on divedb.

I'm not sure about the impl thing, care to elaborate?

[–] RunAwayFrog 2 points 1 year ago (1 children)

I’m not sure about the impl thing, care to elaborate?

See this serde-derive code.

Basically, you're wrapping your impl in a dummy const, so your impl lives in its own lexical scope.

You can set attributes on that scope, define consts/statics, import stuff that will not interfere with anything outside the generated code...etc.

So, just add your use lines. You can allow unused imports on the scope too, no conditional imports needed to avoid warnings. You don't have to worry about anything 😉

[–] [email protected] 1 points 1 year ago

Oh wow I'm getting flashbacks to IIFE in js! Makes sense