Trait (computer programming): Difference between revisions

Revision as of 14:31, 4 June 2009

Revision as of 14:41, 4 June 2009

Line 1:

In [[computer programming]], a '''trait''' is an [[abstract type]], used as a "simple conceptual model for structuring [[object oriented]] programs".<ref>http://web.cecs.pdx.edu/~black/publications/TR_CSE_02-012.pdf</ref> Traits are similar to [[mixin]]s, but may include definitions for class methods.

Traits are supported as a native language feature in the [[Scala programming language]],

<ref>http://www.scala-lang.org/node/126 A Tour of Scala: Traits</ref>

<ref>http://www.ibm.com/developerworks/java/library/j-scala04298.html The busy Java developer's guide to Scala: Of traits and behaviors</ref>

the [[Squeak]] version of [[Smalltalk]] from version 3.9, and in [[Perl 6]] (which calls them "roles"),

as an add-on by the [[Moose (Perl)|Moose]] module for [[Perl 5]] and the [[Joose framework]] for [[JavaScript]],

and have been proposed for inclusion in [[Smalltalk]], [[PHP]], and [[ActionScript|ActionScript 3.0]].

''Module mixins'' in [[Ruby (programming language)|Ruby]] are similar to traits to some degree.