Trait (computer programming): Difference between revisions

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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 have been proposed for inclusion in [[Smalltalk]], [[PHP]], and [[ActionScript|ActionScript 3.0]], and are found in [[Moose (Perl)|Moose]] ([[Perl]] 5), [[Perl 6]], [[Joose (framework)|Joose]] ([[JavaScript]]), and [[Scala programming language|Scala]]. ''Module mixins'' in [[Ruby (programming language)|Ruby]] are similar to traits to some degree.

<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>

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

Traits were initially developed at the Software Composition Group, [[University of Berne]].<ref>http://scg.unibe.ch/cgi-bin/scgbib.cgi?query=nathanael+traits+composable+units+ecoop</ref>