ActsFatras/Selectors/SurfaceSelectors.hpp

0001 // This file is part of the ACTS project.
0002 //
0003 // Copyright (C) 2016 CERN for the benefit of the ACTS project
0004 //
0005 // This Source Code Form is subject to the terms of the Mozilla Public
0006 // License, v. 2.0. If a copy of the MPL was not distributed with this
0007 // file, You can obtain one at https://mozilla.org/MPL/2.0/.
0008
0009 #pragma once
0010
0011 namespace Acts {
0012 class Surface;
0013 }
0014
0015 namespace ActsFatras {
0016
0017 /// Do not select any surface, ever.
0018 struct NoSurface {
0019   /// Reject all surfaces unconditionally
0020   /// @param surface The surface to evaluate (unused)
0021   /// @return Always false
0022   constexpr bool operator()(const Acts::Surface& surface) const {
0023     static_cast<void>(surface);
0024     return false;
0025   }
0026 };
0027
0028 /// Select every surface.
0029 struct EverySurface {
0030   /// Accept all surfaces unconditionally
0031   /// @param surface The surface to evaluate (unused)
0032   /// @return Always true
0033   constexpr bool operator()(const Acts::Surface& surface) const {
0034     static_cast<void>(surface);
0035     return true;
0036   }
0037 };
0038
0039 }  // namespace ActsFatras