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Interestingly enough it seems to do the shift first in Swift

All well-known programming languages will do the shift first.

I looked at about 20 different "popular" languages and I believe that only 2 (Go and Swift) of them have shifts at a higher precedence than addition.

I think I'm missing a reference/joke =/

Or this might just be another confident but baseless HN commenter assertion.

C, C++, Java, and Rust all have shift as lower precedence than addition/subtraction. Edit: and Javascript, Python.

You can add C# as well.

Use brackets to be explicit about your expected order of operations.

Oops! I added brackets, thanks!