[Haskell-cafe] Lazy patterns

[Jon Schneider]

Good day,

I am trying to understand the lazy patterns as explained at

https://www.haskell.org/tutorial/patterns.html

If I type in the example without putting a ~ round the pattern sure enough
I do not get an answer as the text says. What I completely fail to
understand is why there is no CPU usage, increasing memory usage, stack
overflow or other runtime error before I use ^C to stop it. What is going
on under the hood ?

Jon