@witty-crayon-22786 The

vec![foo].into_iter().collect()

dance is finally making me sad enough to think about picking up https://github.com/bluss/maplit or https://github.com/DanielKeep/rust-grabbag/blob/8b309175abca487df78c20e8ba984ec5f3617e11/grabbag_macros/src/lib.rs#L36 or https://github.com/kmcallister/literator or something - any thoughts?