Category:Wren-trait: Difference between revisions

Wren-trait is a module which provides the abstract classes: Comparable, Cloneable and CloneableSeq. The first of these enables child classes to easily support the basic comparison operators and the latter two enables such classes to identify themselves as cloneable given a suitable mechanism.

It also contains the wrapper classes: ByRef, ByKey and Const. ByRef enables a value to be passed by reference to a method or function, ByKey enables a reference type object to be used as a Map key and Const represents a group of individually named read-only values.

It is the fifth in a series of modules (listed on the language's main page) designed to assist with writing Rosetta Code tasks so the same code does not have to be written or copy/pasted time and time again thereby bloating a task's script code unnecessarily. It is also small enough to be used by other modules in the series which are usually organized and written to avoid inter-dependencies.

To use it all you need to do is to copy the source code (in the talk page) to a text file called trait.wren and place this in the same directory as the importing script or module so the command line interpreter can find it.