luabind/detail/error.hpp

   1 // Copyright (c) 2003 Daniel Wallin and Arvid Norberg
   2
   3 // Permission is hereby granted, free of charge, to any person obtaining a
   4 // copy of this software and associated documentation files (the "Software"),
   5 // to deal in the Software without restriction, including without limitation
   6 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
   7 // and/or sell copies of the Software, and to permit persons to whom the
   8 // Software is furnished to do so, subject to the following conditions:
   9
  10 // The above copyright notice and this permission notice shall be included
  11 // in all copies or substantial portions of the Software.
  12
  13 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
  14 // ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
  15 // TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
  16 // PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
  17 // SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
  18 // ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  19 // ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
  21 // OR OTHER DEALINGS IN THE SOFTWARE.
  22
  23 #ifndef LUABIND_ERROR_HPP_INCLUDED
  24 #define LUABIND_ERROR_HPP_INCLUDED
  25
  26 #include <exception>
  27
  28 namespace luabind
  29 {
  30         // this exception usually means that the lua function you called
  31         // from C++ failed with an error code. You will have to
  32         // read the error code from the top of the lua stack
  33         // the reason why this exception class doesn't contain
  34         // the message itself is that std::string's copy constructor
  35         // may throw, if the copy constructor of an exception that is
  36         // being thrown throws another exception, terminate will be called
  37         // and the entire application is killed.
  38         struct error : public std::exception
  39         {
  40                 virtual const char* what() const throw()
  41                 {
  42                         return "lua runtime error";
  43                 }
  44         };
  45
  46         // this exception is thrown when you call a lua function
  47         // from C++, and the return value on the lua stack cannot
  48         // be converted to the type you specified in the C++ call
  49         // (as a template parameter)
  50         class cant_convert_return_value: public std::exception
  51         {
  52         public:
  53
  54                 virtual const char* what() const throw()
  55                 {
  56                         return "The return value from the called function cannot be converted by the given return value policy";
  57                 }
  58
  59         };
  60
  61         // if a object_cast<>() fails, this is thrown
  62         class cast_failed : public std::exception
  63         {
  64         public:
  65                 virtual const char* what() const throw() { return "unable to make cast"; }
  66         };
  67
  68
  69 }
  70
  71 #endif // LUABIND_ERROR_HPP_INCLUDED