> The surface syntax is responsible for some grouping, but not all. This requires that the parser understand the program’s bindings and expand macros to get a complete picture of a program’s structure. Interleaving the parsing of a token stream with macro expansion in this fashion is called enforestation, and it allows macros to extend the syntax of conventional languages. The Honu research language pioneered this technique.

Rhombus takes inspiration from Honu!