this one works well fn get_fun() -> impl Fn() -> usize { || 42 } but what type to return in following function fn get_fun2() -> ??? { || { || 42 } } i've tried impl Fn() -> (impl Fn() -> usize) but it doesn't work, Can someone explain it to me, why it doesn't work, and how to solve it? …

Functional Programming: What type to return?

Finn December 14, 2018, 2:18pm 10

That's right, currently you need to state auxiliary structs. I had the same issue a few weeks ago:

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