alt Hacker NewsIt's only semantically a pass-by-value, in reality a reference is passed and the data is only copied if needed (i.e. value is mutated while shared).
It's only semantically a pass-by-value, in reality a reference is passed and the data is only copied if needed (i.e. value is mutated while shared).
So the language has reference semantics, and (per the edit) for every object (like in Python)?
(Ah, no, your example elsewhere in the thread suggests that the referred-to structures get implicitly copied all over the place.)