
/*!
\ingroup PkgStreamLines2Concepts
\cgalConcept

The concept `StreamLinesTraits_2` describes the set of requirements for
the template parameter of the class 
`CGAL::Regular_grid_2<StreamLinesTraits_2>`. 
This concept provides the types handled by the 
`CGAL::Stream_lines_2<VectorField_2, Integrator_2>` class. 

\cgalHasModel The kernels of \cgal are models for this traits class. 

*/
class StreamLinesTraits_2 {
public:

/// \name Types 
/// @{

/*!
The scalar type. 
*/ 
typedef unspecified_type FT; 

/*!
The point type. 
*/ 
typedef unspecified_type Point_2; 

/*!
The vector type. 
*/ 
typedef unspecified_type Vector_2; 

/// @}

}; /* end StreamLinesTraits_2 */

