Rhombus: A New Spin on Macros without All the Parentheses. - Matthew Flatt; Taylor Allred; Nia Angle; Stephen De Gabrielle; Robert Bruce Findler; Jack Firth; Kiran Gopinathan; Ben Greenman; Siddhartha Kasivajhula; Alex Knauth; Jay A. McCarthy; Sam Phillips; et al. (Proc. ACM Program. Lang., 2023)