17 Library introduction [library]

17.3 Definitions [definitions]

17.3.25 traits class [defns.traits]

a class that encapsulates a set of types and functions necessary for class templates and function templates to manipulate objects of types for which they are instantiated
Note: Traits classes defined in Clauses [strings], [localization] and [input.output] are character traits, which provide the character handling support needed by the string and iostream classes.  — end note ]