[082349872349872]

https://scholarworks.iu.edu/dspace/items/3ab772c9-92c9-4f59-...

Iverson's 1962 book also mentions tree representations, see pp45-62: https://archive.org/details/aprogramminglanguage1962/page/n6...

[gsf_emergency]

Thanks. Was hoping for low-level code that might even blow a deue(I?)ng(m?)ker's mind on THE semantics-syntax duality..

This was closest: https://www.dyalog.com/blog/2018/01/stackless-traversal/

Your links should still be useful for orienteering!