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Multiple ChoiceIntermediate 45s

Declared move ctor disables implicit copy

A class declares a move constructor `T(T&&)` but declares no copy constructor. What happens when code tries to copy the object?
Options
  1. 1The copy constructor is implicitly declared and works normally, copying each member in turn.
  2. 2The copy constructor is implicitly deleted; the copy fails to compile (or binds to nothing).
  3. 3The copy falls back to the move constructor, since the implicit copy was never generated.
  4. 4It compiles but calls the destructor twice, because the copy binds to the move constructor.
cpprule-of-fivespecial-member-functions

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