libMesh
zero_function.h
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1 // The libMesh Finite Element Library.
2 // Copyright (C) 2002-2017 Benjamin S. Kirk, John W. Peterson, Roy H. Stogner
3 
4 // This library is free software; you can redistribute it and/or
5 // modify it under the terms of the GNU Lesser General Public
6 // License as published by the Free Software Foundation; either
7 // version 2.1 of the License, or (at your option) any later version.
8 
9 // This library is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 // Lesser General Public License for more details.
13 
14 // You should have received a copy of the GNU Lesser General Public
15 // License along with this library; if not, write to the Free Software
16 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 
18 #ifndef LIBMESH_ZERO_FUNCTION_H
19 #define LIBMESH_ZERO_FUNCTION_H
20 
21 // Local includes
22 #include "libmesh/const_function.h"
23 
24 namespace libMesh
25 {
26 
34 template <typename Output=Number>
35 class ZeroFunction : public ConstFunction<Output>
36 {
37 public:
38  ZeroFunction () : ConstFunction<Output>(0) {}
39 
40  virtual UniquePtr<FunctionBase<Output>> clone() const libmesh_override
41  {
43  }
44 };
45 
46 } // namespace libMesh
47 
48 #endif // LIBMESH_ZERO_FUNCTION_H
ConstFunction that simply returns 0.
Definition: zero_function.h:35
The libMesh namespace provides an interface to certain functionality in the library.
virtual UniquePtr< FunctionBase< Output > > clone() const libmesh_override
Definition: zero_function.h:40
std::unique_ptr< T > UniquePtr
Definition: auto_ptr.h:46
Function that returns a single value that never changes.