Function call_by::from_val

pub fn from_val<'a, T: By<'a, Val>>(by_val: T) -> T::Type

Safe, zero-cost cast from T to <T as By<'a, Val>>::Type.

Rust’s type system does not always know that T is <T as By<'a, Val>>::Type for all 'a. This function safely converts from the former to the latter.