CGAL 5.6.1 - Algebraic Foundations
FractionTraits Concept Reference

## Definition

A model of FractionTraits is associated with a type Type.

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

Has Models:
CGAL::Fraction_traits<T>
FractionTraits_::Decompose
FractionTraits_::Compose
FractionTraits_::CommonFactor

## Types

typedef unspecified_type Type
The associated type.

typedef unspecified_type Is_fraction
Tag indicating whether the associated type is a fraction and can be decomposed into a numerator and denominator. More...

typedef unspecified_type Numerator_type
The type to represent the numerator. More...

typedef unspecified_type Denominator_type
The (simpler) type to represent the denominator. More...

## Functors

In case Type is not a Fraction all functors are Null_functor.

typedef unspecified_type Compose
A model of FractionTraits_::Compose.

typedef unspecified_type Decompose
A model of FractionTraits_::Decompose.

typedef unspecified_type Common_factor
A model of FractionTraits_::CommonFactor.

## ◆ Denominator_type

The (simpler) type to represent the denominator.

This is undefined in case the associated type is not a fraction.

## ◆ Is_fraction

Tag indicating whether the associated type is a fraction and can be decomposed into a numerator and denominator.

This is either CGAL::Tag_true or CGAL::Tag_false.

## ◆ Numerator_type

The type to represent the numerator.

This is undefined in case the associated type is not a fraction.