Function gluon_base::merge::merge

pub fn merge<F, A: ?Sized, B: ?Sized, R>(
    a_original: &A, 
    a: Option<A::Owned>, 
    b_original: &B, 
    b: Option<B::Owned>, 
    f: F
) -> Option<R> where
    A: ToOwned,
    B: ToOwned,
    F: FnOnce(A::Owned, B::Owned) -> R, 

Merges two values using f if either or both them is Some(..). If both are None, None is returned.