
/*: Markdown documentation
 
 ### Table of contents
 * [Value Types vs. Reference Types](ValueVsReferenceTypes)
 * [Mixing Value Types and Reference Types](MixingValueReferenceTypes)
 * [Copying](Copying)
 * [Copying Reference Types](CopyingReferenceTypes)
 * [Equality vs. Identity](EqualityVsIdentity)
 * [Equatable and Comparable](EquatableComparable)
 * [Type Checking and Type Casting](TypeCheckingCasting)
 
 */
