r/ProgrammerHumor 2d ago

Meme bugIntroducedDebugging

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1.1k Upvotes

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u/AnnoyedVelociraptor 2d ago

FYI char in Rust is 32-bits, maximum size of a UTF-8 character

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u/Xirdus 1d ago

Rust's char stores UTF-32, not UTF-8, but yes.

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u/AnnoyedVelociraptor 1d ago

I did some more reading, and I wonder if it is more correct that Rust encodes Unicode Scalars as char?

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u/Xirdus 1d ago

Technically speaking, the spec says char represents Unicode scalar, with actual encoding unspecified. The spec requires that char is 4 bytes and has the same ABI as u32, but that's it.

In practice, it's UTF-32.