Editing Parrot virtual machine (section)

==={{Anchor|PMC}}Functional concepts===
Parrot has rich support for several features of [[functional programming]] including [[Closure (computer science)|closures]] and [[continuation]]s, both of which can be particularly difficult to implement correctly and portably, especially in conjunction with [[exception handling]] and [[thread (computer science)|threading]]. The biggest advantage is the dynamic extendability of objects with methods, which allows for ''polymorphic containers'' (PMCs) and associated [[opcode]]s. Implementing solutions to these problems at the virtual machine level obviates the need to solve them in the individual client languages.