Multiple ChoiceHard 45s
string_view as function parameter
A function takes `std::string_view` and stores it in a member that outlives the call. The risk is:
Options
- 1None; a string_view always owns its own buffer, so storing it never risks a dangling view.
- 2If the caller passed a temporary std::string, the view dangles; string_view never owns or keeps lifetime.
- 3It is safe, because string_view deep-copies the source string during its construction.
- 4It is safe, because string_view keeps the source alive through shared ownership counting.
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