I kinda wish there was a better way to do if err != nil in go

I would rename Check to Must which there is at least some precedent for.

I don’t think it is a taboo, but it is possibly just worse code in many cases. Handling error values is usually something that should be done thoughtfully. Panic is nice but can easily be overused and should not make it out of a package.

I too wish there was a better way, but in the form of proper enums and result and option types. However, wrapping in functions is fine in some cases not taboo.

As an aside, you probably don’t need a static union type for your min and max functions. I assume you could use comparable.

There is! See “Errors are values” from the Go blog: https://go.dev/blog/errors-are-values

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I too consider that if err != nil a bit complicated to type. Most times, I wrap it away in a function like your Check0. I know that the major "framework" for command line applications (cobra) has a similar logic with its checkError function.