empty_fallback_chain

Function maybe_empty_fallback_chain

Source 
pub fn maybe_empty_fallback_chain<A: IntoIterator, B: IntoIterator<Item = A::Item>>(
    a: A,
    b: Option<B>,
) -> EmptyFallbackChain<A::IntoIter, B::IntoIter> ⓘ
Expand description

Construct an EmptyFallbackChain iterator with the second one optionally “pre-emptively made empty”

See IteratorExt::maybe_empty_fallback_chain for more information.