Struct std::iter::FlatMap

pub struct FlatMap<'self, A, T, U> {
    priv iter: T,
    priv f: &'self fn(A) -> U,
    priv frontiter: Option<U>,
    priv backiter: Option<U>,
}

An iterator that maps each element to an iterator, and yields the elements of the produced iterators

Trait Implementations

Advance the iterator and return the next value. Return None when the end is reached.

Return a lower bound and upper bound on the remaining length of the iterator.

The common use case for the estimate is pre-allocating space to store the results.

Yield an element from the end of the range, returning None if the range is empty.