LispForum

You could stick with Qt4 and use CommonQt. The Qt5 support is obviously planned.
There exists CAPI, it looks nice to me, but it's not open/free*.

*It should be noted that I don't mean exact definitions, but rather my feelings about that.

There is a kind of comparison, lots of text fewer tables. It could be out of date, I haven't inspected that.

I'm not familiar with deftest.
But on the unexported symbol, they can be accessed with double colon:

If you used another implementation of scheme things wouldn't happen so good. You are trying to use a block of code, but you can't just use surrounding parentheses: ((expr1) (expr2) (expr3)) the first member of a list (expr1) is evaluated and used as an function, thus for a block of code there is an ...

In docs they say:

The executable you create will not have a read-eval-print-loop, so be sure to have an expression that starts your program running in the definitions window before creating the executable.

Therefore, you have to write your own REPL or use the built-in one.

In functional programming style you'd write functions working with the stream in a way that you'd pass the stream as an extra argument to them and then you'd just use with-open-file in code using these functions.

There are other issues too. The with-open-file lexically encompasses code with an open stream (it opens the stream execute the code inside and closes the stream), but it appears you want to open the outside stream from let . For that you have functions: open , close and open-stream-p . Moreover, i'd...

Just try in the .emacs file alone, it's doing nothing. I'm using therefore try to replace it in your code.

The defun isn't a special construction, the parenthesis has to be in front of it.

Yeah, one must change the approach (in functional programming), be more declarative than imperative. Right now, I'm learning Haskell (deeper and deeper) and the pure functional programming has its own glamour.