“C++ Templates are Turing Complete” by Todd L. Veldhuizen has the history of discovery, early elaboration.
Link to paper:
http://web.archive.org/web/20131101122512/http://ubietylab.n...
Via "Accidentally Turing-Complete":
https://news.ycombinator.com/item?id=30189780
alt Hacker News
Link to paper:
http://web.archive.org/web/20131101122512/http://ubietylab.n...
Via "Accidentally Turing-Complete":
https://news.ycombinator.com/item?id=30189780