source: src/Fragmentation/Summation/ZeroInstance.hpp@ a3fc46

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Last change on this file since a3fc46 was beb16e, checked in by Frederik Heber <heber@…>, 12 years ago

Added template function ZeroInstance to have zero value in OrthogonalSummation::Sum() initially.

  • the problem is that e.g. double's default cstor does not initialize to 0 as the underlying representation is not a bunch of 0 bits as given by the OS.
  • Property mode set to 100644
File size: 587 bytes
Line 
1/*
2 * ZeroInstance.hpp
3 *
4 * Created on: Aug 10, 2012
5 * Author: heber
6 */
7
8#ifndef ZEROINSTANCE_HPP_
9#define ZEROINSTANCE_HPP_
10
11
12// include config.h
13#ifdef HAVE_CONFIG_H
14#include <config.h>
15#endif
16
17/** This functions returns an instance equal to zero.
18 *
19 * @return instance initialized to zero
20 */
21template <typename T> T ZeroInstance()
22{
23 return NULL;
24}
25
26template<> inline double ZeroInstance<double>() { return 0.; }
27template<> inline int ZeroInstance<int>() { return 0; }
28template<> inline size_t ZeroInstance<size_t>() { return (size_t)0; }
29
30
31#endif /* ZEROINSTANCE_HPP_ */
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