throw expressions (C++ only)

You use a throw expression to indicate that your program has encountered an exception.

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The type of assignment_expression cannot be an incomplete type, or a pointer to an incomplete type other than one of the following:

The assignment_expression is treated the same way as a function argument in a call or the operand of a return statement.

If the assignment_expression is a class object, the copy constructor and destructor of that object must be accessible. For example, you cannot throw a class object that has its copy constructor declared as private.

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