impl Fn which returns an impl

[Alphapage]

Hello,

fn fun(p: impl Fn(i32)) {} compiles. But:
fn fun(p: impl Fn(i32) -> impl Fn(i32)){} doesn't.

Is it intentional ?

Thank you in advance for your answers.

[madsmtm]

A better place to ask this is probably the users forum, but the answer is that yes, it is indeed intentional, though I'm not the right person to answer in detail why ;)