/usr/include/root/Math/Vector2Dfwd.h is in libroot-math-genvector-dev 5.34.30-0ubuntu8.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// Authors: W. Brown, M. Fischler, L. Moneta 2005
/**********************************************************************
* *
* Copyright (c) 2005 , LCG ROOT MathLib Team *
* *
* *
**********************************************************************/
// Header file Vector2Dfwd
//
// Created by: Lorenzo Moneta at Mon Apr 16 2007
//
//
#ifndef ROOT_Math_Vector2Dfwd
#define ROOT_Math_Vector2Dfwd 1
// forward declarations of displacement vectors (Vectors) and type defs definitions
namespace ROOT {
namespace Math {
template<class CoordSystem, class Tag> class DisplacementVector2D;
template<typename T> class Cartesian2D;
template<typename T> class Polar2D;
class DefaultCoordinateSystemTag;
/**
2D Vector based on the cartesian coordinates x,y in double precision
*/
typedef DisplacementVector2D< Cartesian2D<double>, DefaultCoordinateSystemTag > XYVector;
typedef XYVector XYVectorD;
/**
2D Vector based on the cartesian coordinates x,y,z in single precision
*/
typedef DisplacementVector2D< Cartesian2D<float>, DefaultCoordinateSystemTag > XYVectorF;
/**
2D Vector based on the polar coordinates rho, phi in double precision.
*/
typedef DisplacementVector2D< Polar2D<double>, DefaultCoordinateSystemTag > Polar2DVector;
typedef Polar2DVector Polar2DVectorD;
/**
2D Vector based on the polar coordinates rho, phi in single precision.
*/
typedef DisplacementVector2D< Polar2D<float>, DefaultCoordinateSystemTag > Polar2DVectorF;
} // end namespace Math
} // end namespace ROOT
#endif /* ROOT_Math_Vector2Dfwd */
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