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Classes and Resource Ownership · 4:34
When Construction Fails
A constructor can't return an error code, so what should it do when it can't keep its promise? We follow an exception through stack unwinding, see why a vector copies instead of moving unless the move constructor is noexcept, watch a noexcept function call terminate, and compare the ways a program can end, all measured on a real Mac.
You will learn
- Explain class invariants and why a constructor throws when it can't establish one
- Trace stack unwinding and predict which destructors run
- Explain why move constructors should be noexcept (vector growth)
- Compare return from main, exit, abort and terminate