this post was submitted on 13 Jun 2024
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Announcing Rust 1.79.0 (blog.rust-lang.org)
submitted 4 months ago by snaggen@programming.dev to c/rust@programming.dev
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[–] BatmanAoD@programming.dev 10 points 4 months ago* (last edited 4 months ago)

How does the const { None } example type-inference work? The size of the option type can't be known without knowing the type of the Somevariant.

Edit: aha, it doesn't work as-is. It needs to infer the type of elements of foo from usage. https://play.rust-lang.org/?version=stable&mode=debug&edition=2021&gist=05a95c592626b6935ae812527aa6bbc6