On: Show HN: Rust library for numerical integration of...

[legobmw99]

Is there a technical reason to now allow closures as the integrand?

[n_plus_1_acc → legobmw99]

Mayve because they aren't guaranteed to be actual functions (in the mathematical sense) and could return random values

[legobmw99 → n_plus_1_acc]

The Fn trait could be used, which prevents mutation, but allows a lot of useful closures. I should note, a motivated user could provide a junk function no matter what the type accepted is