\begin{ccRefConcept}{FractionTraits}

\ccDefinition

A model of \ccRefName\ is associated with a type \ccc{Type}.

In case the associated type is a \ccc{Fraction}, a model of \ccRefName\
provides the relevant functionality for decomposing and re-composing as well
as the numerator and denominator type.

\ccInclude{CGAL/Fraction_traits.h}

\ccTypes

\ccNestedType{Type}{the associated type}
\ccNestedType{Is_fraction}{ 
        Tag indicating whether the associated type is a fraction and can be 
        decomposed into a numerator and denominator. \\
        This is either \ccc{CGAL::Tag_true} or \ccc{CGAL::Tag_false}.}
\ccNestedType{Numerator_type  }{The type to represent the numerator. 
        This is undefined in case the associated type is not a fraction. }
\ccNestedType{Denominator_type}{The (simpler) type to represent the denominator.
        This is undefined in case the associated type is not a fraction. }

\ccHeading{Functors}

In case \ccc{Type} is not a \ccc{Fraction} all functors are \ccc{Null_functor}.

\ccNestedType{Decompose}{A model of \ccc{FractionTraits::Decompose}.}
\ccNestedType{Compose}{A model of \ccc{FractionTraits::Compose}.}
\ccNestedType{Common_factor}{A model of \ccc{FractionTraits::CommonFactor}.}

\ccHasModels

\ccRefIdfierPage{CGAL::Fraction_traits<T>}\\

\ccSeeAlso
\ccRefConceptPage{FractionTraits::Decompose}\\
\ccRefConceptPage{FractionTraits::Compose}\\
\ccRefConceptPage{FractionTraits::CommonFactor}\\

\end{ccRefConcept}