I implemented racket's for loops for guile scheme (my server is down since a week, so my hosted documentation isn't up, but you can find it in the repo linked b

I implemented racket's for loops for guile scheme (my server is down since a week, so my hosted documentation isn't up, but you can find it in the repo linked below). It is maybe not a trivial macro, but I didn't need to struggle much to reach about 90% feature parity with racket. The code it outputs is almost always as fast as a hand-rolled named-let (just as with racket), and you can port it without much difficulty to other schemes. I support most of the sequence iterators (in-range, in-list etc) and support non-tco loops to create things like lazy streams. https://bitbucket.org/bjoli/guile-for-loops/ https://bitbucket.org/bjoli/guile-for-loops/