Bonjour, > There’s the ,expand command at the REPL. > > It’s implemented like this: > > (define (repl-expand repl form) > (let ((from (repl-language repl)) > (opts (repl-compile-options repl))) > (decompile (compile form #:from from #:to 'tree-il #:opts opts > #:env (current-module)) > #:from 'tree-il #:to from))) > > Psyntax, the macro expander, returns tree-il, hence the need to go > through ‘decompile’.
Thanks a lot. By the way, the (undocumented, as of 2.0.5) decompile function returns two values -- the first being the expanded expression and the second -- #f. As I've figured out from system/base/compile, the second return value is the environment, but I've been wondering under what circumstances would that value be different from #f. Best regards MG
