Are Boolean operators lazy?

Hello,

TL;DR: Are the and and or Boolean operators guaranteed to be lazy, so we can document it?

I encountered this bug https://github.com/nushell/nushell/issues/10237 which makes last error out on an empty input instead of returning a null if I understand correctly.

So I have written this workaround:

  let filler = if ($text != "") and ($text | split chars | last) == "%" { "%" } else { " " }

This code works without errors for me, so the RHS of the and Boolean operator must not be evaluated / be lazily evaluated.
To put it short, the and operator seems lazy (nu version 0.108.0)

I cannot find it documented in Boolean | Nushell and looking for "lazy" in the documentation does not yield anything related to Booleans.

Is and guaranteed to be lazy in future versions? What about or?
Should we document this behavior?

リンクされている Boolean のドキュメントページと、参照されている Nushell の issue 10237 から始めてください。and と or が遅延評価されることが保証されているかを確認し、その後、確認できた動作と、適切な Boolean のドキュメントページにある示された例への影響を文書化してください。