[ElliotH]

I'm not entirely sure this is valid. I'm happy to be shown that I'm wrong, but it doesn't seem to support environments meaning that you couldn't implement define, making it essentially not a scheme interpreter.

I'd be impressed by an actual implementation of R5RS in a small line count, but this just seems to be a calculator with lambda expressions and lists.

[c4m]

Thanks for the feedback. It does support environments - if you check the source code it refers to environments as 'scope'. It is not possible to properly implement lambda without implementing environments.