> The Killer Feature: |> with Auto-Tracing. No other language has this combination

Of the languages listed, Elixir, Python and Rust can all achieve this combination. Elixir has a pipe operator built-in, and Python and Rust have operator overloading, so you could overload the bitwise | operator (or any other operator you want) to act as a pipeline operator. And Rust and Elixir have macros, and Python has decorators, which can be used to automatically add logging/tracing to functions.

It's not automatic for all functions, though having to be explicit/selective about what is logged/traced is generally considered a good thing. It's rare that real-world software wants to log/trace literally everything, since it's not only costly (and slow) but also a PII risk.

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tyushk 5 hours ago | parent [-]

In Rust, wouldn't implementing BitOr for Fn/FnOnce/FnMut violate the orphan rule?

	▲	wavemode 4 hours ago \| parent [-]
		I'm envisioning that in Rust (and Python), the operator overload would be on a class/struct. It would be the macro/decorator (the same one that adds logging) which would turn the function definition into an object that implements Fn.