Logo ROOT   master
Reference Guide
StaticCheck.h
Go to the documentation of this file.
1 // @(#)root/smatrix:$Id$
2 // Authors: T. Glebe, L. Moneta 2005
3 
4 
5 ////////////////////////////////////////////////////////////////////////////////
6 // The Loki Library
7 // Copyright (c) 2001 by Andrei Alexandrescu
8 // This code accompanies the book:
9 // Alexandrescu, Andrei. "Modern C++ Design: Generic Programming and Design
10 // Patterns Applied". Copyright (c) 2001. Addison-Wesley.
11 // Permission to use, copy, modify, distribute and sell this software for any
12 // purpose is hereby granted without fee, provided that the above copyright
13 // notice appear in all copies and that both that copyright notice and this
14 // permission notice appear in supporting documentation.
15 // The author or Addison-Wesley Longman make no representations about the
16 // suitability of this software for any purpose. It is provided "as is"
17 // without express or implied warranty.
18 ////////////////////////////////////////////////////////////////////////////////
19 
20 // Last update: June 20, 2001
21 
22 #ifndef Root_Math_StaticCheck
23 #define Root_Math_StaticCheck
24 
25 
26 // case of dictionary generator
27 #if defined(__MAKECINT__) || defined(G__DICTIONARY)
28 
29 #include "Math/MConfig.h"
30 #include <iostream>
31 #include <cassert>
32 
33 #define STATIC_CHECK(expr, msg) \
34  if (!(expr) ) std::cerr << "ERROR: " << #msg << std::endl; \
35  assert(expr);
36 
37 #else
38 
39 namespace ROOT
40 {
41 
42  namespace Math {
43 
44 #ifndef USE_OLD_SC
45 
46 
47  template<bool> struct CompileTimeChecker
48  {
49  CompileTimeChecker(void *) {}
50  };
51  template<> struct CompileTimeChecker<false> {};
52 
53  } // end namespace Math
54 } // end namespace ROOT
55 
56 #define STATIC_CHECK(expr, msg) \
57  { class ERROR_##msg {}; \
58  ERROR_##msg e; \
59  (void) (ROOT::Math::CompileTimeChecker<(expr) != 0> (&e)); }
60 
61 
62 #else
63 ////////////////////////////////////////////////////////////////////////////////
64 // Helper structure for the STATIC_CHECK macro
65 ////////////////////////////////////////////////////////////////////////////////
66 
67  template<int> struct CompileTimeError;
68  template<> struct CompileTimeError<true> {};
69 
70  } // end namespace Math
71 } // end namespace ROOT
72 
73 ////////////////////////////////////////////////////////////////////////////////
74 // macro STATIC_CHECK
75 // Invocation: STATIC_CHECK(expr, id)
76 // where:
77 // expr is a compile-time integral or pointer expression
78 // id is a C++ identifier that does not need to be defined
79 // If expr is zero, id will appear in a compile-time error message.
80 ////////////////////////////////////////////////////////////////////////////////
81 
82 #define STATIC_CHECK(expr, msg) \
83  { ROOT::Math::CompileTimeError<((expr) != 0)> ERROR_##msg; (void)ERROR_##msg; }
84 
85 
86 ////////////////////////////////////////////////////////////////////////////////
87 // Change log:
88 // March 20, 2001: add extra parens to STATIC_CHECK - it looked like a fun
89 // definition
90 // June 20, 2001: ported by Nick Thurn to gcc 2.95.3. Kudos, Nick!!!
91 ////////////////////////////////////////////////////////////////////////////////
92 
93 #endif
94 
95 #endif
96 
97 #endif // STATIC_CHECK_INC_
Returns the available number of logical cores.
Definition: RNumpyDS.hxx:30
Namespace for new Math classes and functions.