LispForum

*DEBUGGER-HOOK* seems to be what you want?

http://www.lispworks.com/documentation/ ... ger-hookST

It seems to me that you want to do this in two steps, first walk the tree to figure out the how deep the tree goes, and then walk the tree again simplifying all nodes at that depth

... and if we're gonna necro, then it's also worth pointing out that sharp quote will do the right thing in the face of LABELS/FLET

Try JOIN-THREAD

Your problem is actually that you are mixing imperative with functional style. There is no special handling of the last form of the body of DO, it is discarded, so your call to CONS is wasted, and SAT remains NIL As an aside, DO should be used only in situations where you can't use one of the more s...

If you are pasting into the terminal then you may be hitting the maximum size of the clipboard, if your code is run with stdin from a file it works-for-me™️ Peters-MacBook-Pro:local-projects peter$ cat /tmp/data.txt | sbcl --script test.lisp Array: 1000299 1000298 1000297 1000296 1000295 1000294...

Which platform, which implementation, and some code to show what you are doing would help me help you.

I use ASDF:SYSTEM-RELATIVE-PATHNAME (usually with a per-package wrapper) to directly create PATHNAMES when I need to do this.

In sbcl back-quote READs into an internal structure-type (this is allowed by the standard, even if inconvenient), which means that any symbols that you are trying to grovel in that back-quote would be ignored by your walker. I don't know if other things are also allowed to READ non-portably (I'm una...

Watch out on sbcl because that's a naive walker