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Reference Guide
TPyException.h
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1 // @(#)root/pyroot:$Name: $:$Id$
2 // Author: Scott Snyder, Apr 2004
3 
4 #ifndef ROOT_TPyException
5 #define ROOT_TPyException
6 
7 //////////////////////////////////////////////////////////////////////////////
8 // //
9 // TPyException //
10 // //
11 // Purpose: A C++ exception class for throwing python exceptions //
12 // through C++ code. //
13 // Created: Apr, 2004, sss, from the version in D0's python_util. //
14 // //
15 // The situation is: //
16 // - We're calling ROOT C++ code from python. //
17 // - The C++ code can call back to python. //
18 // - What to do then if the python callback throws an exception? //
19 // //
20 // We need to get the control flow back to where PyROOT makes the ROOT call.//
21 // To do that we throw a TPyException. //
22 // We can then catch this exception when we do the ROOT call. //
23 // //
24 // Note that we don't need to save any state in the exception -- it's //
25 // already in the python error info variables. //
26 // (??? Actually, if the program is multithreaded, this is dangerous //
27 // if the code has released and reacquired the lock along the call chain. //
28 // Punt on this for now, though.) //
29 // //
30 //////////////////////////////////////////////////////////////////////////////
31 
32 // ROOT
33 #include "DllImport.h"
34 #include "Rtypes.h"
35 
36 // Standard
37 #include <exception>
38 
39 
40 namespace PyROOT {
41 
42 class TPyException : public std::exception {
43 public:
44 // default constructor
45  TPyException();
46 
47 // destructor
48  virtual ~TPyException() noexcept;
49 
50 // give reason for raised exception
51  virtual const char* what() const noexcept;
52 
53  ClassDef(TPyException,0) //C++ exception for throwing python exceptions
54 };
55 
56 } // namespace PyROOT
57 
58 #if defined(G__DICTIONARY) && defined(R__SOLARIS)
59 // Force the inclusion of rw/math.h
60 #include <limits>
61 // Work around interaction between a struct named exception in math.h,
62 // std::exception and the use of using namespace std;
63 #if (__SUNPRO_CC < 0x5050)
64 #define exception std::exception
65 #endif
66 #endif
67 #endif
virtual const char * what() const noexcept
#define ClassDef(name, id)
Definition: Rtypes.h:320
virtual ~TPyException() noexcept