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Remember,
the lifetime of a temporary object is from the
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time
it is created until the end of the statement in which it
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was
created.
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In
the assignment statement, the temporary object is
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destroyed
after the temporary is assigned.
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As a
formal argument (passed by value), the temporary
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object
is destroyed after the function is called.
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Therefore,
not only are temporary objects formed (and the
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constructor
implicitly invoked) but the objects are also
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destroyed
(and the destructors are implicitly invoked).
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