Parameter Passing
=================

Given the following (partial) class definitions:

.. code-block:: c++
   :caption: Variant A

   class Person
   {
   public:
       Person(std::string firstname, 
              std::string lastname);
   };

.. code-block:: c++
   :caption: Variant B

   class Person
   {
   public:
       Person(const std::string& firstname, 
              const std::string& lastname);
   };

Question 1: Which One Is Better?
--------------------------------

Which of these class definitions would lead to better performance in
object initialization?

.. list-table::
   :align: left
   :widths: auto
   :header-rows: 1

   * * Variant A
     * Variant B
   * *
     *

Question2: Why?
---------------

Why does the chosen variant perform better? (Write an ``X`` in the
"True" or "False" columns)

.. list-table::
   :align: left
   :widths: auto
   :header-rows: 1

   * * True
     * False
     * Statement
   * *
     *
     * Variant A has a shorter calling sequence
   * *
     *
     * Variant A is better at moving the parameters into the object
   * *
     *
     * Variant B does not create temporary copies