Category:Wren-trait: Difference between revisions

Change to blurb following addition of Const class.
(Changed description following transfer of iteration classes to Wren-iterate.)
(Change to blurb following addition of Const class.)
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'''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 ByKeyConst. ByRef enables a value to be passed ''by reference'' to a method or function and, 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 [https://rosettacode.org/wiki/Category:Wren 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.
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