luabind/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 <luabind/prefix.hpp>
  27 #include <exception>
  28 #include <luabind/config.hpp>
  29
  30 struct lua_State;
  31
  32 namespace luabind
  33 {
  34
  35 #ifndef LUABIND_NO_EXCEPTIONS
  36
  37         // this exception usually means that the lua function you called
  38         // from C++ failed with an error code. You will have to
  39         // read the error code from the top of the lua stack
  40         // the reason why this exception class doesn't contain
  41         // the message itself is that std::string's copy constructor
  42         // may throw, if the copy constructor of an exception that is
  43         // being thrown throws another exception, terminate will be called
  44         // and the entire application is killed.
  45         class error : public std::exception
  46         {
  47         public:
  48                 error(lua_State* L): m_L(L) {}
  49                 lua_State* state() const throw() { return m_L; }
  50                 virtual const char* what() const throw()
  51                 {
  52                         return "lua runtime error";
  53                 }
  54         private:
  55                 lua_State* m_L;
  56         };
  57
  58         // if an object_cast<>() fails, this is thrown
  59         // it is also thrown if the return value of
  60         // a lua function cannot be converted
  61         class cast_failed : public std::exception
  62         {
  63         public:
  64                 cast_failed(lua_State* L, LUABIND_TYPE_INFO i): m_L(L), m_info(i) {}
  65                 lua_State* state() const throw() { return m_L; }
  66                 LUABIND_TYPE_INFO info() const throw() { return m_info; }
  67                 virtual const char* what() const throw() { return "unable to make cast"; }
  68         private:
  69                 lua_State* m_L;
  70                 LUABIND_TYPE_INFO m_info;
  71         };
  72
  73 #else
  74
  75         typedef void(*error_callback_fun)(lua_State*);
  76         typedef void(*cast_failed_callback_fun)(lua_State*, LUABIND_TYPE_INFO);
  77
  78         void set_error_callback(error_callback_fun e);
  79         void set_cast_failed_callback(cast_failed_callback_fun c);
  80         error_callback_fun get_error_callback();
  81         cast_failed_callback_fun get_cast_failed_callback();
  82
  83 #endif
  84
  85         typedef int(*pcall_callback_fun)(lua_State*);
  86         void set_pcall_callback(pcall_callback_fun e);
  87         pcall_callback_fun get_pcall_callback();
  88
  89 }
  90
  91 #endif // LUABIND_ERROR_HPP_INCLUDED
  92