CGAL 5.1  Algebraic Foundations

A model of the concept FromDoubleConstructible
is required to be constructible from the type double
.
In case the type is a model of RealEmbeddable
too, for any double d the identity: d == CGAL::to_double(T(d))
, is guaranteed.
Creation  
FromDoubleConstructible (const double &d)  
conversion constructor from double.  