Self-test questions

For multiple choice questions, choose all the options that apply:

1. What are the advantages of using boost::swap over std::swap?

   a. There is no real advantage

   b. boost::swap invokes swap overloads supplied with the passed type, if any

   c. boost::swap is faster than std::swap

   d. boost::swap does not throw exceptions

2. Can you apply a visitor to multiple variant arguments in a single call? (Hint: you may want to look up the online documentation)

   a. Yes. A visitor can only be applied to one or two variant arguments

   b. Yes. A visitor can be applied to one or more arguments

   c. No. The member operators take only one variant argument

   d. None of the above

3. Is the following a valid compile-time assert?

   BOOST_STATIC_ASSERT(x == 0); // x is some variable

   a. Yes, provided x is of an integral type

   b. Yes, provided x is declared as a const static numeric variable

   c. No, x is a variable, and its value cannot be known at compile time

   d. Only expressions involving sizeof are valid in a BOOST_STATIC_ASSERT...