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A
downcast operation is when a pointer to a direct or
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indirect
base class is converted to a pointer to a derived
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class.
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The
static_cast operator syntax is
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static_cast<type*>(expr)
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where expr is an expression pointing
to a direct or
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indirect
base class object and type is a derived class.
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The
result of the cast operation is that expr is converted to
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a
pointer to the specified type, converting the static type of
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one
pointer into another.
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As
such, it depends on the programmer to ensure that the
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conversion
is correct. It is inherently unsafe because no
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run
time type information is used.
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